102 results on '"S. O'Dwyer"'
Search Results
2. 10P Molecular mutations in appendix cancers
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M.C. Strach, B. Chakrabarty, R. Nagaraju, G.J. Burghel, H. Schlecht, S. Mullamitha, M. Braun, S. O'Dwyer, O. Aziz, and J. Barriuso
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Cancer Research ,Oncology - Published
- 2023
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3. Mechanisms for spectral variation in the range of semi-variograms.
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S. O'Dwyer and Philip Lewis
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- 2003
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4. An application of stereomatching to the problem of geo-referencing historical air-photos.
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S. O'Dwyer, Philip Lewis, and Jan-Peter Müller
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- 2003
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- View/download PDF
5. The economic recession and subjective well-being in older adults in the Republic of Ireland
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Brendan D. Kelly, M Wrigley, K Mullin, S O'Dwyer, and Richard M. Duffy
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Employment ,Male ,media_common.quotation_subject ,Recession ,The Republic ,03 medical and health sciences ,Diagnostic Self Evaluation ,0302 clinical medicine ,Economic situation ,History and Philosophy of Science ,Surveys and Questionnaires ,Humans ,030212 general & internal medicine ,Subjective well-being ,Applied Psychology ,Social policy ,media_common ,Aged ,Mental health ,Confidence interval ,030227 psychiatry ,European Social Survey ,Psychiatry and Mental health ,Cross-Sectional Studies ,Economic Recession ,Mental Health ,Female ,Psychology ,Ireland ,Demography - Abstract
ObjectiveSubjective well-being in older people is strongly associated with emotional, physical and mental health. This study investigates subjective well-being in older adults in Ireland before and after the economic recession that commenced in 2008.MethodsCross-sectional data from the biennial European Social Survey (2002–2012) were analysed for two separate groups of older adults: one sampled before the recession and one after. Stratification and linear regression modelling were used to analyse the association between subjective well-being, the recession and multiple potential confounders and effect modifiers.ResultsData were analysed on 2013 individuals. Overall, subjective well-being among older adults was 1.30 points lower after the recession compared with before the recession (s.e. 0.16; 95% confidence interval 1.00–1.61; ps.d. 3.24); post-recession:14.8 (s.d. 3.72)]. Among these older adults, the pre- and post-recession difference was especially marked in women, those with poor health and those living in urban areas.ConclusionsSubjective well-being was significantly lower in older adults after the recession compared with before the recession, especially in women with poor health in urban areas. Policy-makers need proactively to protect these vulnerable cohorts in future health and social policy. Future research could usefully focus on older people on fixed incomes whose diminished ability to alter their economic situation might make them more vulnerable to reduced subjective well-being during a recession.
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- 2019
6. Biphasic drug release testing coupled with diffusing wave spectroscopy for mechanistic understanding of solid dispersion performance
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Jankovic, S. O'Dwyer, P.J. Box, K.J. Imanidis, G. Reppas, C. Kuentz, M.
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Amorphous solid dispersions (ASDs) represent an important formulation technique to achieve supersaturation in gastrointestinal fluids and to enhance absorption of poorly water-soluble drugs. Drug release from such systems is complex due to emergence of different colloidal structures and potential drug precipitation, which can occur in parallel to absorption. The latter drug uptake from the intestinal lumen can be simulated by an organic layer in a biphasic in vitro test, which was employed in this work to mechanistically study the release of ketoconazole from ASDs produced by hot melt extrusion using different HPMCAS grades. A particular aim was to introduce diffusing wave spectroscopy (DWS) to biopharmaceutical testing of solid dispersions. Results indicated that amorphous formulations prevented crystallization of the weakly basic drug upon transfer into the intestinal medium. Microrheological differences among polymer grades and plasticizers were revealed in the aqueous phase, which affected drug release and subsequently uptake into the organic layer. The results indicate that DWS can be employed as a new non-invasive tool to better understand drug release from solid dispersions. This novel light scattering technique is highly promising for future biopharmaceutical research on supersaturating systems such as solid dispersions. © 2019 Elsevier B.V.
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- 2019
7. Cytoreductive surgery and HIPEC improve survival compared to palliative chemotherapy for biliary carcinoma with peritoneal metastasis: A multi-institutional cohort from PSOGI and BIG RENAPE groups
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I. Amblard, F. Mercier, D.L. Bartlett, S.A. Ahrendt, K.W. Lee, H.J. Zeh, E.A. Levine, D. Baratti, M. Deraco, P. Piso, D.L. Morris, B. Rau, A.A.K. Tentes, J.-J. Tuech, F. Quenet, E. Akaishi, M. Pocard, Y. Yonemura, G. Lorimier, D. Delroeux, L. Villeneuve, O. Glehen, G. Passot, J. Abba, K. Abboud, M. Alyami, C. Arvieux, N. Bakrin, J.-M. Bereder, D. Bouzard, C. Brigand, S. Carrère, F. Dumont, C. Eveno, O. Facy, F. Guyon, R. Kianmanesh, R. Lo Dico, F. Marchal, P. Mariani, P. Meeus, S. Msika, P. Ortega-Deballon, B. Paquette, P. Peyrat, N. Pirro, J. Porcheron, P. Rat, O. Sgarbura, E. Thibaudeau, F. Zinzindohoue, S.H. Baik, A. Bhatt, P. Cachin, W. Ceelen, I. De Hingh, M. De Simone, P. Dubé, R.P. Edwards, J. Franko, L. Gonzalez-Bayon, V. Gushchin, M.P. Holtzman, M.-C. Hsieh, D. Kecmanovic, K. Lehmann, Y. Liu, S. Mehta, S. O'Dwyer, E. Orsevigo, P.K. Pande, E.J. Park, J.F. Pingpank, F. Rajan, A. Sardi, L. Sideris, A. Sommariva, J. Spiliotis, P. Sugarbaker, M. Teo, R. Yarema, R. Younan, S.S. Zaveri, Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), Hospices Civils de Lyon (HCL), Ciblage thérapeutique en Oncologie (EA3738), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Service de chirurgie digestive [CHU Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Institut de Recherche en Cancérologie de Montpellier (IRCM - U1194 Inserm - UM), CRLCC Val d'Aurelle - Paul Lamarque-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Service de Chirurgie d'Oncologie Digestive [CHU Lariboisière], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Lariboisière-Fernand-Widal [APHP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Institut de Cancérologie de l'Ouest [Angers/Nantes] (UNICANCER/ICO), UNICANCER, and Centre Hospitalier Régional Universitaire de Besançon (CHRU Besançon)
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Adult ,Male ,medicine.medical_specialty ,Peritoneal metastasis ,medicine.medical_treatment ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,030230 surgery ,03 medical and health sciences ,0302 clinical medicine ,Klatskin ,medicine ,Humans ,Prospective Studies ,Registries ,Peritoneal Neoplasms ,Aged ,Aged, 80 and over ,Chemotherapy ,business.industry ,Gallbladder ,Cytoreduction Surgical Procedures ,Hyperthermia, Induced ,General Medicine ,Middle Aged ,Hilar cholangiocarcinoma ,Prognosis ,Gemcitabine ,3. Good health ,Surgery ,Biliary carcinoma ,Survival Rate ,medicine.anatomical_structure ,Bile Duct Neoplasms ,Oncology ,030220 oncology & carcinogenesis ,Cohort ,Peritoneal Cancer Index ,Intra-hepatic cholangiocarcinoma ,Female ,Hyperthermic intraperitoneal chemotherapy ,France ,business ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology ,Follow-Up Studies ,medicine.drug - Abstract
Background Peritoneal metastasis from biliary carcinoma (PMC) is associated with poor prognosis when treated with chemotherapy. Objective To evaluate the impact on survival of cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC), and compare with conventional palliative chemotherapy for patients with PMC. Material and methods A prospective multicenter international database was retrospectively searched to identify all patients with PMC treated with a potentially curative CRS/HIPEC (CRS/HIPEC group). The overall survival (OS) was compared to patients with PMC treated with palliative chemotherapy (systemic chemotherapy group). Survival was analyzed using Kaplan-Meier method and compared with Log-Rank test. Results Between 1995 and 2015, 34 patients were included in the surgical group, and compared to 21 in the systemic chemotherapy group. In the surgical group, median peritoneal cancer index was 9 (range 3–26), macroscopically complete resection was obtained for 25 patients (73%). There was more gallbladder localization in the surgical group compared to the chemotherapy group (35% vs. 18%, p = 0.001). Median OS was 21.4 and 9.3 months for surgical and chemotherapy group, respectively (p=0.007). Three-year overall survival was 30% and 10% for surgical and chemotherapy group, respectively. Conclusion Treatment with CRS and HIPEC for biliary carcinoma with peritoneal metastasis is feasible and may provide survival benefit when compared to palliative chemotherapy.
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- 2018
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8. E-PORTFOLIO APPLICATION FOR STUDENT REFLECTION AND ENGAGEMENT IN THREE CASE STUDIES IN AN ARCHITECTURE SCHOOL IN THE UNITED KINGDOM
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A. Banteli, A. Du Plooy, and S. O’Dwyer
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Kingdom ,Mathematics education ,Portfolio ,Sociology ,Architecture ,Reflection (computer graphics) - Published
- 2018
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9. Is there an oncological interest in the combination of CRS/HIPEC for peritoneal carcinomatosis of HCC? Results of a multicenter international study
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Vadim Gushchin, M. Teo, Frédéric Dumont, David L. Morris, Jean-Jacques Tuech, Guillaume Passot, Lilian Schwarz, R. Kianmanesh, J. Abba, M. De Simone, Antonio Sommariva, D. Kecmanovic, Jan Franko, D. Delroeux, Rami Younan, S.S. Zaveri, Catherine Arvieux, G. Ferron, Olivier Glehen, Mao-Chih Hsieh, Marc Pocard, Frédéric Marchal, P.K. Pande, Gérard Lorimier, Beate Rau, M.-C. Hsieh, Cécile Brigand, F. Rajan, Seung Hyuk Baik, S. Carrère, P. Meeus, F. Guyon, N. Pirro, Y. Liu, P. Ortega-Deballon, Edward A. Levine, P. Piso, Dario Baratti, F. Zinzindohoue, E. Thibaudeau, A. Sardi, Diane Goéré, J.-M. Bereder, A.A.K. Tentes, R. Lo Dico, Mohammad Alyami, J. Porcheron, O. Sgarbura, S. Mehta, L. Gonzalez-Bayon, Aditi Bhatt, M.P. Holtzman, Pascale Mariani, Wim Ceelen, S.A. Ahrendt, K. Abboud, O. Facy, E. Orsenigo, David L. Bartlett, Paul H. Sugarbaker, P. Cachin, N. Bakrin, Laurent Villeneuve, R.P. Edwards, B. Paquette, J.F. Pingpank, P. Rat, K. Lehmann, Y. Yonemura, S. O'Dwyer, P. Peyrat, John Spiliotis, D. Bouzard, Sanket Mehta, K.W. Lee, I. H. J. T. de Hingh, François Quenet, L. Sideris, S. Msika, Roman Yarema, Eduardo Hiroshi Akaishi, Clarisse Eveno, H.J. Zeh, Pierre Dubé, Eun Jung Park, Vahan Kepenekian, Département de chirurgie [CHU Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Institut Gustave Roussy (IGR), Département de chirurgie, CRLCC Val d'Aurelle - Paul Lamarque, Institut de Recherche en Cancérologie de Montpellier (IRCM - U1194 Inserm - UM), CRLCC Val d'Aurelle - Paul Lamarque-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Ciblage thérapeutique en Oncologie (EA3738), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Centre Hospitalier Lyon Sud [CHU - HCL] (CHLS), and Hospices Civils de Lyon (HCL)
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Male ,MESH: Combined Modality Therapy ,Colorectal cancer ,Hepatocellular carcinoma ,0302 clinical medicine ,MESH: Liver Neoplasms ,Pseudomyxoma peritonei ,MESH: Peritoneal Neoplasms ,Cytoreductive surgery ,MESH: Carcinoma, Hepatocellular ,Peritoneal Neoplasms ,MESH: Treatment Outcome ,MESH: Aged ,Univariate analysis ,MESH: Middle Aged ,Standard treatment ,Liver Neoplasms ,General Medicine ,Cytoreduction Surgical Procedures ,Middle Aged ,Prognosis ,Combined Modality Therapy ,3. Good health ,Survival Rate ,Treatment Outcome ,Oncology ,030220 oncology & carcinogenesis ,030211 gastroenterology & hepatology ,Hyperthermic intraperitoneal chemotherapy ,Female ,Adult ,medicine.medical_specialty ,Carcinoma, Hepatocellular ,MESH: Survival Rate ,Adolescent ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,MESH: Prognosis ,03 medical and health sciences ,medicine ,Humans ,MESH: Cytoreduction Surgical Procedures ,MESH: Hyperthermia, Induced ,Aged ,Retrospective Studies ,MESH: Adolescent ,MESH: Humans ,HIPEC ,business.industry ,MESH: Adult ,MESH: Retrospective Studies ,Hyperthermia, Induced ,medicine.disease ,MESH: Male ,Surgery ,Peritoneal Cancer Index ,Ovarian cancer ,business ,MESH: Female ,Peritoneal carcinomatosis ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
Introduction Peritoneal metastasis (PM) of hepatocellular carcinoma (HCC) without distant spread are rare. The related prognosis is poor without standard treatment available. The role of cytoreduction surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC) is poorly documented. Methods An international multicentric cohort was constituted by retrospective analysis of 21 patients undergoing CRS/HIPEC for PM of HCC between 1992 and 2016 from 10 reference centers of PSOGI. Data on clinical features, treatment strategies, and survival outcomes were analyzed. Results The median time interval from the diagnosis of PM to the procedure was 4.5 months. The median peritoneal cancer index was 14. Sixteen patients had complete cytoreduction (CCR0-1). Ten patients had grades 3 to 4 complications. The median duration of follow-up was 52.2 months. The median OS was 46.7 months. The projected 3y-OS and 5y-OS were 88.9 and 49.4% respectively. The median OS for patients with CCR0-1 resection was not reached whereas it was 5.9 months for those with CCR2-3 resection after CRS (p = 0.0005). The median RFS was 26.3 months and projected RFS at 3 years of 36.5 months Three prognostic factors were associated with improved RFS in the univariate analysis: preoperative chemotherapy (p = 0.0156), PCI >15 (p = 0.009), Number of chemotherapy agents used for HIPEC (p = 0.005). Conclusion CRS/HIPEC is a safe and effective approach in selected patients with PM of HCC. CRS/HIPEC gives the patient a chance for a good relapse free and overall survival and should be considered as an option.
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- 2018
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10. Clinical Consensus Guidelines on the Application of Cerebrospinal Fluid Biomarkers for Alzheimer's Disease Diagnosis: Recommendations of the Irish Network for Biomarkers in Neurodegeneration
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A M, Miller, E, Begley, R, Coen, M, Doyle, J, Dunne, S, Hutchinson, S P, Kennelly, R A, Kenny, R P, Killeen, A, Lynch, S, O'Dwyer, C, O'Neill, S S, O'Sullvan, M J, Rowan, N, Sheehy, C, McGuigan, and B A, Lawlor
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Amyloid beta-Peptides ,Alzheimer Disease ,Humans ,tau Proteins ,Ireland ,Biomarkers ,Peptide Fragments - Abstract
It is accepted that a lumbar puncture (LP) and cerebrospinal fluid (CSF) biomarker analysis support the routine diagnostic work-up for the differential diagnosis of dementia due to Alzheimer's disease (AD) within certain patient cohorts1. These tests, which measure CSF protein concentrations of amyloid-β42 (Aβ42), total tau (t-tau) and phospho tau (p-tau), were recently validated, accredited and made available clinically for the first time in Ireland. A working group, comprising Irish clinical and scientific researchers, met to review a) the validation results; b) international consensus opinions, and c) research and clinical evidence as to the clinical utility of CSF biomarker analysis for AD dementia diagnosis. The outcome of this meeting was the formulation of a consensus statement paper for the benefit of health care professionals involved in the diagnosis and management of dementia to ensure appropriate use of these biomarker tests in clinical settings in Ireland.
- Published
- 2017
11. Depression in old age in Austria, Ireland, Portugal and Sweden
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Carl Hörnsten, L. Lagarto, Yngve Gustafson, Vasco Nogueira, T. Egger, T. Fruehwald, Brian A. Lawlor, Horácio Firmino, Alfonso J. Cruz-Jentoft, R.E. Roller, and S. O'Dwyer
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Gerontology ,Geriatrics ,education.field_of_study ,medicine.medical_specialty ,business.industry ,Population ,Mental illness ,medicine.disease ,Quality of life (healthcare) ,Epidemiology ,medicine ,Geriatrics and Gerontology ,education ,business ,Psychiatry ,Depression (differential diagnoses) ,Disease burden ,Management of depression - Abstract
Depression is the third leading cause of disease burden worldwide and the most frequent psychiatric disorder in the older adult population. Depression in old age is disabling, both psychosocially and physically, decreases quality of life and increases mortality. This paper explores the epidemiology, screening, diagnosis and management of depression in old age in four European countries in an attempt to gain a better understanding of the issues contributing to the variability in clinical practice. The prevalence of depression in community dwelling older individuals is high, but studies in the oldest population and in specific settings (like nursing homes) are few. Depression may go undiagnosed, and wide screening programs for early identification of this disease are uncommon. Depression screening is consistently included in comprehensive geriatric assessment, and most geriatricians appear to be confident in its diagnosis and management. Old age psychiatry is still largely underdeveloped, except for Ireland. Primary care physicians start treatment of depression in most countries, referring only complex cases for specialised care. SSRIs seem to be the first line treatment, but choice of antidepressants is widely variable in different countries. Availability of non-pharmacological therapies is still low, and only highly skilled centres use a multifaceted approach to depression care. Attitudes towards depression and mental illness are still mostly negative, which may hinder identification and management of this highly prevalent geriatric problem.
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- 2013
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12. User Requirements for Data Communications in the United States.
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D. S. O'Dwyer and W. F. Reddersen
- Published
- 1976
13. Detection of Toxoplasma gondii DNA in naturally infected sheep's milk
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Luciana Afonso Guimarães, D de Santana Rocha, George Rêgo Albuquerque, H N S O'dwyer, Alexandre Dias Munhoz, R L de Sousa Moura, and Bianca Mendes Maciel
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Population ,Sheep Diseases ,law.invention ,Excretion ,chemistry.chemical_compound ,law ,parasitic diseases ,Genetics ,medicine ,Prevalence ,Parasite hosting ,Animals ,education ,Molecular Biology ,Polymerase chain reaction ,Sheep, Domestic ,education.field_of_study ,Sheep ,biology ,Toxoplasma gondii ,General Medicine ,DNA, Protozoan ,medicine.disease ,biology.organism_classification ,Virology ,Toxoplasmosis ,Milk ,Toxoplasmosis, Animal ,chemistry ,biology.protein ,Female ,Antibody ,Toxoplasma ,DNA - Abstract
The objective of this study was to verify whether Toxoplasma gondii is excreted in the milk of naturally infected sheep. In order to accomplish this, 275 lactating ewes were used; these were bred extensively in 17 estates distributed across nine cities. Polymerase chain reaction amplification was used to detect T. gondii DNA in milk samples, and the indirect immunofluorescence test was employed for the detection of anti-T. gondii IgG antibodies in the sera, with a cut-off value of 1:64. It was possible to verify the presence of the parasite DNA in 6.5% (18/275) of the studied animals. Anti-T. gondii antibodies were present in 41.5% of the animals studied (114/275). There was no correlation between parasite excretion in milk and the presence of IgG in 38.9% of the studied animals (7/18). The high seropositivity and the presence of parasite DNA in the milk led to the conclusion that T. gondii infection is present in the sheep population in southern and southwestern Bahia, and that there is a risk of the human population becoming infected due to the consumption of raw, in natura milk.
- Published
- 2015
14. Clinical and Economic Benefits of a Community Pharmacy Vaccination Strategy
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P O'Reilly, S O'Dwyer, Stephen McCarthy, J. Gallagher, and Stephen Byrne
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Vaccination ,medicine.medical_specialty ,Nursing ,Community pharmacy ,business.industry ,Health Policy ,Family medicine ,Public Health, Environmental and Occupational Health ,medicine ,business ,Economic benefits - Published
- 2016
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15. On the potential of CHRIS/PROBA for estimating vegetation canopy properties from space
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S. O'Dwyer, Mathias Disney, M. Cutter, D. Lobb, Philip Lewis, P. Hobson, and M. J. Barnsley
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Geography ,Spectrometer ,Geography, Planning and Development ,Imaging spectrometer ,Hyperspectral imaging ,Satellite ,Vegetation ,Bidirectional reflectance distribution function ,Albedo ,Instrumentation ,Image resolution ,Remote sensing - Abstract
The Compact High Resolution Imaging Spectrometer (CHRIS), to be launched on board the PROBA (Project for On‐Board Autonomy) satellite in 2001/2002, will provide remotely‐sensed data for terrestrial and atmospheric applications. The mission is intended to demonstrate the potential of a compact, low‐cost, imaging spectrometer when combined with a small, agile satellite platform. CHRIS will provide data in 18–62 user‐selectable spectral channels in the range 400 nm to 1050 nm (1.25 nm ‐ 11 nm intervals) at a nominal spatial resolution of either 25 m or 50 m. Since PROBA can be pointed off‐nadir in both the along‐track and across‐track directions, it will be possible to use CHRIS to sample the Bidirectional Reflectance Distribution Function (BRDF) of the land surface. This combination of an agile satellite and a highly configurable sensor offers the unique potential to acquire high spatial resolution, spectral BRDF data sets and, from these, to study the biophysical and biochemical properties of vegetation ca...
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- 2000
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16. Evaluation of odontogenic maxillary sinusitis using cone-beam computed tomography: three case reports
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Rita S. O’Dwyer, Jerome J. Cymerman, and Diane H. Cymerman
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Molar ,Endodontic therapy ,Male ,Cone beam computed tomography ,Chronic bronchitis ,Maxillary sinus ,Mucocele ,Dentistry ,stomatognathic system ,Medicine ,Humans ,Mandibular Diseases ,Sinusitis ,General Dentistry ,Sinus (anatomy) ,Aged ,business.industry ,Mucous retention cyst ,Cone-Beam Computed Tomography ,Middle Aged ,medicine.disease ,Maxillary Sinusitis ,Root Canal Therapy ,stomatognathic diseases ,medicine.anatomical_structure ,Tooth Extraction ,Female ,business ,Periapical Periodontitis - Abstract
Introduction Ten to twelve percent of all cases of maxillary sinusitis derive from odontogenic origin. The purpose of this study was to report the use of cone-beam computed tomography (CBCT) scanning in elucidating dental pathology as an etiology of maxillary sinusitis. Methods Intraoral periapical radiographs and CBCT scanning were performed in the evaluation of three patients presenting with pain, sinus congestion, or respiratory complaints. In the first case, extractions of impacted third molar and adjacent nonrestorable tooth were performed. In the second two cases, endodontic therapy was done. Radiologic follow-up with CBCT scanning or medical computed tomography scanning was performed 6 to 12 months after dental procedures were performed. Results All three patients presented with severe sinusitis that resolved after appropriate dental treatment. The first patient also showed marked improvement of chronic bronchitis after completion of dental treatment. In all patients, complete or near total resolution of sinusitis, including eradication of mucous retention cyst, was confirmed by post-treatment CBCT or computed tomography scanning. Conclusions These cases show the utility of CBCT scanning in evaluating patients presenting with concurrent sinus and dental complaints. In these three patients, maxillary sinusitis of odontogenic origin responded well to the eradication of dental etiology.
- Published
- 2011
17. Hospital/physician contracting and the illegality defense
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M W, Peregrine, A A, Waller, and J S, O'Dwyer
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Professional Corporations ,Fees, Medical ,Medicaid ,Fee Schedules ,Medical Staff, Hospital ,Humans ,Ethics, Institutional ,Liability, Legal ,Medicare Part B ,Contract Services ,Financial Management, Hospital ,Hospitals, Voluntary ,United States - Published
- 1994
18. A case of dermatitis artefacta
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M, Carew-McColl and S, O'Dwyer
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Adult ,Self Mutilation ,Humans ,Dermatitis ,Female - Published
- 1982
19. An Application of Stereomatching to the Problem of Geo-Referencing Historical Air-Photos
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Jan-Peter Muller, Philip Lewis, and S. O'Dwyer
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Set (abstract data type) ,Transformation (function) ,Computer science ,Photography ,Elevation ,Geo referencing ,Topographic map ,Digital elevation model ,Image resolution ,Remote sensing - Abstract
This paper describes the application of a stereomatching algorithm to the problem of geo-rectifying a set of declassified military air photos over Cat Tien National Park, Vietnam. A disparity model, related to topographic features, is first built and then co-registered to a geo-referenced elevation model to provide the transformation required to correct the air-photos. Accuracy of results is assessed through correlation coefficients between retrieved disparities and known elevations.
20. The Roman Roads of Wales: An Historical Survey
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P. C. and S. O'Dwyer
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Geography ,Geography, Planning and Development ,Archaeology ,Earth-Surface Processes - Published
- 1939
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21. Screening doctors in training for dyslexia: the benefits of an inclusive screening approach.
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O'Dwyer S, Lavington G, Miller J, Elfes C, Calogeras A, and El-Bakri F
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There is a lack of suitable screeners for dyslexia for doctors in training, as the typical adult screeners do not cater for the needs of capable medical graduates. The aim of this research is to create an inclusive screening and training process for doctors with undiagnosed dyslexia. This involved working with doctors to co-create a new dyslexia screener tool. We designed an innovative holistic dyslexia screening, assessment, and support system as part of a 3-year longitudinal study. Qualitative data was collected through the use of a dyslexia screener and case-study interviews with trainees in general practice and psychiatry. Interviews were thematically analyzed to explore dyslexic trainees' experiences of an inclusive approach to dyslexia screening and assessment. Out of the 103 trainees that were screened, 10 were found to have dyslexia, one dyspraxia, and another ADHD trait. Dyslexia-specific coaching, exam, and workplace accommodations were beneficial in dispelling stigma about dyslexia as well as supporting examination success. International Medical Graduate (IMG) trainees were also supported in this process. The case study participants' progression was tracked over 3 years, and all subsequently passed their examinations. We recommend that all trainees are given access to this inclusive, holistic, medical-focused dyslexia screening process. Specifically, this can enable newly diagnosed trainees to access support and exam accommodation. In particular, greater understanding of dyslexia helps dispel stigma and enable better support, which has a positive impact on trainee well-being as well as progression., (© The Author(s) 2024. Published by Oxford University Press on behalf of Fellowship of Postgraduate Medicine.)
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- 2024
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22. Metformin in the management of antipsychotic-induced weight gain - why the 'weight'?
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Fitzgerald I, Sahm LJ, Ní Dhubhlaing C, O'Dwyer S, O'Connell J, Torrens J, and Crowley EK
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Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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- 2024
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23. Hyperthermic intraoperative peritoneal chemotherapy and cytoreductive surgery for people with peritoneal metastases: a systematic review and cost-effectiveness analysis.
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Gurusamy K, Leung J, Vale C, Roberts D, Linden A, Wei Tan X, Taribagil P, Patel S, Pizzo E, Davidson B, Mould T, Saunders M, Aziz O, and O'Dwyer S
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- Humans, Technology Assessment, Biomedical, Randomized Controlled Trials as Topic, Female, Quality-Adjusted Life Years, Ovarian Neoplasms pathology, Ovarian Neoplasms drug therapy, Ovarian Neoplasms surgery, Ovarian Neoplasms therapy, Hyperthermia, Induced economics, Cost-Effectiveness Analysis, Cost-Benefit Analysis, Peritoneal Neoplasms secondary, Peritoneal Neoplasms therapy, Peritoneal Neoplasms drug therapy, Hyperthermic Intraperitoneal Chemotherapy, Cytoreduction Surgical Procedures economics
- Abstract
Background: We compared the relative benefits, harms and cost-effectiveness of hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery ± systemic chemotherapy versus cytoreductive surgery ± systemic chemotherapy or systemic chemotherapy alone in people with peritoneal metastases from colorectal, gastric or ovarian cancers by a systematic review, meta-analysis and model-based cost-utility analysis., Methods: We searched MEDLINE, EMBASE, Cochrane Library and the Science Citation Index, ClinicalTrials.gov and WHO ICTRP trial registers until 14 April 2022. We included only randomised controlled trials addressing the research objectives. We used the Cochrane risk of bias tool version 2 to assess the risk of bias in randomised controlled trials. We used the random-effects model for data synthesis when applicable. For the cost-effectiveness analysis, we performed a model-based cost-utility analysis using methods recommended by The National Institute for Health and Care Excellence., Results: The systematic review included a total of eight randomised controlled trials (seven randomised controlled trials, 955 participants included in the quantitative analysis). All comparisons other than those for stage III or greater epithelial ovarian cancer contained only one trial, indicating the paucity of randomised controlled trials that provided data. For colorectal cancer, hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy probably results in little to no difference in all-cause mortality (60.6% vs. 60.6%; hazard ratio 1.00, 95% confidence interval 0.63 to 1.58) and may increase the serious adverse event proportions compared to cytoreductive surgery ± systemic chemotherapy (25.6% vs. 15.2%; risk ratio 1.69, 95% confidence interval 1.03 to 2.77). Hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy probably decreases all-cause mortality compared to fluorouracil-based systemic chemotherapy alone (40.8% vs. 60.8%; hazard ratio 0.55, 95% confidence interval 0.32 to 0.95). For gastric cancer, there is high uncertainty about the effects of hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy versus cytoreductive surgery + systemic chemotherapy or systemic chemotherapy alone on all-cause mortality. For stage III or greater epithelial ovarian cancer undergoing interval cytoreductive surgery, hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy probably decreases all-cause mortality compared to cytoreductive surgery + systemic chemotherapy (46.3% vs. 57.4%; hazard ratio 0.73, 95% confidence interval 0.57 to 0.93). Hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy may not be cost-effective versus cytoreductive surgery + systemic chemotherapy for colorectal cancer but may be cost-effective for the remaining comparisons., Limitations: We were unable to obtain individual participant data as planned. The limited number of randomised controlled trials for each comparison and the paucity of data on health-related quality of life mean that the recommendations may change as new evidence (from trials with a low risk of bias) emerges., Conclusions: In people with peritoneal metastases from colorectal cancer with limited peritoneal metastases and who are likely to withstand major surgery, hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy should not be used in routine clinical practice ( strong recommendation ). There is considerable uncertainty as to whether hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy or cytoreductive surgery + systemic chemotherapy should be offered to patients with gastric cancer and peritoneal metastases (no recommendation) . Hyperthermic intraoperative peritoneal chemotherapy + cytoreductive surgery + systemic chemotherapy should be offered routinely to women with stage III or greater epithelial ovarian cancer and metastases confined to the abdomen requiring and likely to withstand interval cytoreductive surgery after chemotherapy ( strong recommendation )., Future Work: More randomised controlled trials are necessary., Study Registration: This study is registered as PROSPERO CRD42019130504., Funding: This award was funded by the National Institute for Health and Care Research (NIHR) Health Technology Assessment programme (NIHR award ref: 17/135/02) and is published in full in Health Technology Assessment ; Vol. 28, No. 51. See the NIHR Funding and Awards website for further award information.
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- 2024
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24. Informing the development of antipsychotic-induced weight gain management guidance: patient experiences and preferences - qualitative descriptive study.
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Fitzgerald I, Crowley EK, Ní Dhubhlaing C, O'Dwyer S, and Sahm LJ
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Background: Antipsychotic-induced weight gain (AIWG) is a substantial contributor to high obesity rates in psychiatry. Limited management guidance exists to inform clinical practice, and individuals with experience of managing AIWG have had no or minimal input into its development. A lack of empirical research outlining patient values and preferences for management also exists. Recommendations addressing weight management in psychiatry may be distinctly susceptible to ideology and sociocultural values regarding intervention appropriateness and expectations of self-management, reinforcing the need for co-produced management guidance. This study is the first to ask: how do individuals conceptualise preferred AIWG management and how can this be realised in practice?, Aims: 1. Explore the management experiences of individuals with unwanted AIWG. 2. Elicit their values and preferences regarding preferred management., Method: Qualitative descriptive methodology informed study design. A total of 17 participants took part in semi-structured interviews. Data analysis was undertaken using reflexive thematic analysis., Results: Participants reported that clinicians largely overestimated AIWG manageability using dietary and lifestyle changes. They also reported difficulties accessing alternative management interventions, including a change in antipsychotic and/or pharmacological adjuncts. Participants reported current management guidance is oversimplified, lacks the specificity and scope required, and endorses a 'one-size-fits-all' management approach to an extensively heterogenous side-effect. Participants expressed a preference for collaborative AIWG management and guidance that prioritises early intervention using the range of evidence-based management interventions, tailored according to AIWG risk, participant ability and participant preference., Conclusion: Integration of this research into guideline development will help ensure recommendations are relevant and applicable, and that individual preferences are represented.
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- 2024
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25. Human A2-CAR T Cells Reject HLA-A2 + Human Islets Transplanted Into Mice Without Inducing Graft-versus-host Disease.
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Ellis CE, Mojibian M, Ida S, Fung VCW, Skovsø S, McIver E, O'Dwyer S, Webber TD, Braam MJS, Saber N, Sasaki S, Lynn FC, Kieffer TJ, and Levings MK
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- Humans, Mice, Animals, HLA-A2 Antigen, Leukocytes, Mononuclear, Graft Rejection prevention & control, Receptors, Chimeric Antigen, Graft vs Host Disease, Islets of Langerhans Transplantation, Insulins
- Abstract
Background: Type 1 diabetes is an autoimmune disease characterized by T-cell-mediated destruction of pancreatic beta-cells. Islet transplantation is an effective therapy, but its success is limited by islet quality and availability along with the need for immunosuppression. New approaches include the use of stem cell-derived insulin-producing cells and immunomodulatory therapies, but a limitation is the paucity of reproducible animal models in which interactions between human immune cells and insulin-producing cells can be studied without the complication of xenogeneic graft-versus-host disease (xGVHD)., Methods: We expressed an HLA-A2-specific chimeric antigen receptor (A2-CAR) in human CD4 + and CD8 + T cells and tested their ability to reject HLA-A2 + islets transplanted under the kidney capsule or anterior chamber of the eye of immunodeficient mice. T-cell engraftment, islet function, and xGVHD were assessed longitudinally., Results: The speed and consistency of A2-CAR T-cell-mediated islet rejection varied depending on the number of A2-CAR T cells and the absence/presence of coinjected peripheral blood mononuclear cells (PBMCs). When <3 million A2-CAR T cells were injected, coinjection of PBMCs accelerated islet rejection but also induced xGVHD. In the absence of PBMCs, injection of 3 million A2-CAR T cells caused synchronous rejection of A2 + human islets within 1 wk and without xGVHD for 12 wk., Conclusions: Injection of A2-CAR T cells can be used to study rejection of human insulin-producing cells without the complication of xGVHD. The rapidity and synchrony of rejection will facilitate in vivo screening of new therapies designed to improve the success of islet-replacement therapies., (Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2023
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26. Predicting antipsychotic-induced weight gain in first episode psychosis - A field-wide systematic review and meta-analysis of non-genetic prognostic factors.
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Fitzgerald I, Sahm LJ, Byrne A, O'Connell J, Ensor J, Ní Dhubhlaing C, O'Dwyer S, and Crowley EK
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- Humans, Prognosis, Weight Gain, Body Mass Index, Antipsychotic Agents adverse effects, Psychotic Disorders drug therapy
- Abstract
Background: Whether non-genetic prognostic factors significantly influence the variable prognosis of antipsychotic-induced weight gain (AIWG) has not yet been systematically explored., Methods: Searches for both randomized and non-randomized studies were undertaken using four electronic databases, two trial registers, and via supplemental searching methods. Unadjusted and adjusted estimates were extracted. Meta-analyses were undertaken using a random-effects generic inverse model. Risk of bias and quality assessments were undertaken using Quality in Prognosis Studies (QUIPS) and Grading of Recommendations Assessment, Development and Evaluation (GRADE), respectively., Results: Seventy-two prognostic factors were assessed across 27 studies involving 4426 participants. Only age, baseline body mass index (BMI), and sex were suitable for meta-analysis. Age (b=-0.044, 95%CI -0.157-0.069), sex (b=0.236, 95%CI -0.086-0.558), and baseline BMI (b=-0.013 95%CI -0.225-0.200) were associated with nonsignificant effects on AIWG prognosis. The highest quality GRADE rating was moderate in support of age, trend of early BMI increase, antipsychotic treatment response, unemployment, and antipsychotic plasma concentration. Trend of early BMI increase was identified as the most clinically significant prognostic factor influencing long-term AIWG prognosis., Conclusions: The strong prognostic information provided by BMI trend change within 12 weeks of antipsychotic initiation should be included within AIWG management guidance to highlight those at highest risk of worse long-term prognosis. Antipsychotic switching and resource-intensive lifestyle interventions should be targeted toward this cohort. Our results challenge previous research that several clinical variables significantly influence AIWG prognosis. We provide the first mapping and statistical synthesis of studies examining non-genetic prognostic factors of AIWG and highlight practice, policy, and research implications.
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- 2023
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27. Human A2-CAR T cells reject HLA-A2+ human islets transplanted into mice without inducing graft versus host disease.
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Ellis CE, Mojibian M, Ida S, Fung VCW, Skovsø S, McIver E, O'Dwyer S, Webber TD, Braam MJS, Saber N, Kieffer TJ, and Levings MK
- Abstract
Background: Type 1 diabetes (T1D) is an autoimmune disease characterised by T cell mediated destruction of pancreatic beta-cells. Islet transplantation is an effective therapy, but its success is limited by islet quality and availability along with the need for immunosuppression. New approaches include use of stem cell-derived insulin-producing cells and immunomodulatory therapies, but a limitation is the paucity of reproducible animal models in which interactions between human immune cells and insulin-producing cells can be studied without the complication of xenogeneic graft- versus -host disease (xGVHD)., Methods: We expressed an HLA-A2-specific chimeric antigen receptor (A2-CAR) in human CD4+ and CD8+ T cells and tested their ability to reject HLA-A2+ islets transplanted under the kidney capsule or anterior chamber of the eye of immunodeficient mice. T cell engraftment, islet function and xGVHD were assessed longitudinally., Results: The speed and consistency of A2-CAR T cells-mediated islet rejection varied depending on the number of A2-CAR T cells and the absence/presence of co-injected peripheral blood mononuclear cells (PBMCs). When <3 million A2-CAR T cells were injected, co-injection of PBMCs accelerated islet rejection but also induced xGVHD. In the absence of PBMCs, injection of 3 million A2-CAR T cells caused synchronous rejection of A2+ human islets within 1 week and without xGVHD for 12 weeks., Conclusions: Injection of A2-CAR T cells can be used to study rejection of human insulin-producing cells without the complication of xGVHD. The rapidity and synchrony of rejection will facilitate in vivo screening of new therapies designed to improve the success of isletreplacement therapies.
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- 2023
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28. The spectrum of functional tic-like behaviours: Data from an international registry.
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Martino D, Hedderly T, Murphy T, Müller-Vahl KR, Dale RC, Gilbert DL, Rizzo R, Hartmann A, Nagy P, Anheim M, Owen T, Malik O, Duncan M, Heyman I, Liang H, McWilliams A, O'Dwyer S, Fremer C, Szejko N, Han VX, Kozlowska K, and Pringsheim TM
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- Adolescent, Young Adult, Humans, Female, Male, Retrospective Studies, Comorbidity, Tics, Autism Spectrum Disorder, Tic Disorders epidemiology, Tic Disorders drug therapy, Attention Deficit Disorder with Hyperactivity, Tourette Syndrome epidemiology
- Abstract
Background and Purpose: Between 2019 and 2022, there was a marked rise in adolescents/young adults seeking urgent help for functional tic-like behaviours (FTLBs). Given the global scale of this phenomenon, we aimed to pool cases from different institutions in an international registry to better characterize this spectrum and facilitate future longitudinal observation., Methods: An international collaborative group from 10 tertiary referral centres for tic disorders collected retrospective data on FTLB patients who sought specialists' attention between the last quarter of 2019 and June 2022. An audit procedure was used for collection of data, which comprised demographics, course of presentation and duration, precipitating and predisposing factors, phenomenology, comorbidities, and pharmacological treatment outcome., Results: During the study period, we collected data on 294 patients with FTLBs, 97% of whom were adolescents and young adults and 87% of whom were female. FTLBs were found to have a peak of severity within 1 month in 70% of patients, with spontaneous remissions in 20%, and a very high frequency of complex movements (85%) and vocalizations (81%). Less than one-fifth of patients had pre-existing primary tic disorder, 66% had comorbid anxiety disorders, 28% comorbid depressive disorders, 24% autism spectrum disorder and 23% attention deficit/hyperactivity disorder. Almost 60% explicitly reported exposure to tic-related social media content. The vast majority of pharmacologically treated patients did not report benefit with tic-suppressing medications., Conclusions: Our data from the largest multicentre registry of FTLBs to date confirm substantial clinical differences from primary tic disorders. Social modelling was the most relevant contributing factor during the pandemic. Future longitudinal analyses from this database may help understand treatment approaches and responsiveness., (© 2022 European Academy of Neurology.)
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- 2023
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29. RAS Mutation Status Should Not Be Used to Predict Outcome from Cytoreductive Surgery and Hyperthermic Intraperitoneal Chemotherapy for Colorectal Peritoneal Metastases.
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Bhullar D, O'Dwyer S, Wilson M, Saunders MP, Kochhar R, Barriuso J, and Aziz O
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- Humans, Hyperthermic Intraperitoneal Chemotherapy, Cytoreduction Surgical Procedures, Retrospective Studies, Proto-Oncogene Proteins B-raf genetics, Proto-Oncogene Proteins p21(ras) genetics, Combined Modality Therapy, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Mutation, Biomarkers, Survival Rate, Peritoneal Neoplasms therapy, Peritoneal Neoplasms drug therapy, Colorectal Neoplasms therapy, Colorectal Neoplasms drug therapy, Hyperthermia, Induced
- Abstract
Background: Genetic biomarkers guide systemic anti-cancer treatment (SACT) in metastatic colorectal cancer. It has been suggested they have a role in selecting patients with colorectal peritoneal metastases (CRPM) for cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC). This study aims to quantify the effect of mutation status on overall survival (OS), adjusting for confounders such as pre-operative systemic anticancer treatment (SACT)., Patients and Methods: Retrospective analysis of patients undergoing CRS/HIPEC for CRPM at a national peritoneal tumour centre (2004-2017) was performed. Demographics, treatment history and operative data were extracted. Known biomarker gene mutation status was noted including: KRAS, NRAS, BRAF, PIK3CA and MMR. Cox regression analysis and Kaplan-Meier curves were used to determine overall survival., Results: One hundred ninety-five patients were included. Median follow-up time was 34.7 months (range 5.4-184.9 months) and median OS was 38.7 months (95% CI 32.4-44.9 months). Biomarker status was as follows: KRAS (n = 114), NRAS (n = 85), BRAF (n = 44), PIK3CA (n = 15) and MMR (n = 21). Mutation rates were 45.6%, 3.5%, 13.6%, 13.3% and 14.3%, respectively. Seventy-four per cent underwent complete cytoreduction (CC = 0), 81% received SACT pre-CRS/HIPEC and 65% post-CRS/HIPEC. RAS (p = 0.21) or BRAF (p = 0.109) mutation status did not predict OS. Nodal involvement, extramural vascular invasion, Peritoneal Cancer Index (PCI) score, CC score, SACT post-HIPEC and NRAS mutation were significant negative predictors of OS in univariate analysis (p < 0.05). Multivariate Cox regression confirmed CC-score > 1 (HR: 7.599, 95% CI 3.402-16.974, p < 0.0001) as a negative predictor of OS. RAS mutation status did not affect outcome (HR: 1.682, 95% CI 0.995-2.843, p = 0.052)., Conclusions: RAS mutation status should not in isolation be used to select patients for CRS/HIPEC., (© 2022. The Author(s).)
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- 2023
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30. What Works in Violence Prevention Among Young People?: A Systematic Review of Reviews.
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Kovalenko AG, Abraham C, Graham-Rowe E, Levine M, and O'Dwyer S
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- Humans, Adolescent, Young Adult, Adult, Violence prevention & control, Attitude, Sex Offenses prevention & control, Crime Victims, Bullying prevention & control, Intimate Partner Violence prevention & control
- Abstract
Violence prevention programs aim to raise awareness, change attitudes, normative beliefs, motivation, and behavioral responses. Many programs have been developed and evaluated, and optimistic claims about effectiveness made. Yet comprehensive guidance on program design, implementation, and evaluation is limited. The aim of this study was to provide an up-to-date review of evidence on what works for whom. A systematic search of PsycINFO, MEDLINE, ERIC, and Sociology Collection ProQuest identified 40 reviews and meta-analyses reporting on the effectiveness of violence prevention programs among young people (age 15-30) in educational institutions, published before October 2018. These included reviews of programs designed to reduce (i) bullying, (ii) dating and relationship violence, (iii) sexual assault, and (iv) antisocial behavior. Only evaluations that reported on behavioral outcomes such as perpetration, victimization, and bystander behavior were included. The reviewed evaluations reported on programs that were mainly implemented in high-income countries in Europe and North America. The majority found small effects on violence reduction and victimization and increases in self-reported bystander behavior. Our findings expose critical gaps in evaluation research in this area and provide recommendations on how to optimize the effectiveness of future programs.
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- 2022
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31. Healthcare utilisation, physical activity and mental health during COVID-19 lockdown: an interrupted time-series analysis of older adults in England.
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Wang J, Spencer A, Hulme C, Corbett A, Khan Z, Da Silva MV, O'Dwyer S, Wright N, Testad I, Ballard C, Creese B, and Smith R
- Abstract
COVID-19 measures which reduce interpersonal contact may be effective in containing the transmission, but their impacts on peoples' well-being and daily lives overtime remain unclear. Older adults are more vulnerable to both the virus and social isolation. It is therefore imperative to understand how they were affected during this period. Major concerns arising from the pandemic cover the aspects of mental health, healthcare utilisation and individual behavioural changes. Complementing the existing before-and-after analyses, we explore the impacts of easing and re-introducing COVID-19 measures by using a time-series data in England. The data was collected between May and November 2020 from the monthly surveys of the Platform for Research Online to Investigate Genetics and Cognition in Aging (PROTECT). Chi-squared analysis and interrupted time-series analysis were conducted to examine impacts of easing and re-introducing COVID-19 measures. Overall, mental health improves overtime but at a decreasing rate. The use of telephone/video consultations with a doctor or health professional presented a decreasing trend during the pandemic, whilst that of in-person consultation was increasing overtime. We observed significant variations in the time trends of mental health measures, healthcare utilisation and physical activity following the ease but not the re-introduction of COVID-19 measures. Future research is required to understand if these asymmetric impacts were driven by adaption of the people or stringency of the measures., Supplementary Information: The online version contains supplementary material available at 10.1007/s10433-022-00741-y., Competing Interests: Conflict of interestAuthors have no conflict of interest to disclose., (© The Author(s) 2022.)
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- 2022
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32. Healthcare utilisation and physical activities for older adults with comorbidities in the UK during COVID-19.
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Wang J, Spencer A, Hulme C, Corbett A, Khan Z, Vasconcelos Da Silva M, O'Dwyer S, Wright N, Testad I, Ballard C, Creese B, and Smith R
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- Aged, Communicable Disease Control, Comorbidity, Cross-Sectional Studies, Delivery of Health Care, Exercise, Humans, Patient Acceptance of Health Care, United Kingdom epidemiology, COVID-19 epidemiology
- Abstract
A major concern with COVID-19 was the impact it would have on individual health, the routine use of healthcare services, and physical activities, especially for older adults with comorbidities. To address this, we studied the association between these variables for older adults during the pandemic. To explore what policy instruments might be effective in mitigating the negative impacts, we investigated the effects of a shielding notice for those identified as vulnerable by the government and social media given it has been an important source for disseminating information of COVID-19. We employed a UK sample with 3,807 participants aged ≥50 from an online survey administered during May and June 2020. Based on numbers of comorbidities, we separated the sample into a higher comorbidity group with those in the upper quartile of the sample (n = 829) and a lower comorbidity group with the remainder (n = 2,978). Statistical methods include chi-squared analyses and cross-sectional regressions. We found that individuals with higher comorbidities were more likely to have poorer self-reported health and mental health and to receive a shielding notice from the government compared to those without (p < 0.05). Decreases in physical activities were associated with poorer self-reported health and the increases were associated with better self-reported health; on the other hand, the decreases were associated with poorer mental health, but the increases did not link to better mental health. Examination of the effects of policy instruments shows that a shielding notice was positively associated with primary care use. The notice generated greater reliance on telephone/video consultations compared to in-person consultations, but the impacts were less strong for people with higher comorbidities. Frequent use of social media raised the probability of increasing physical activities and reduced that of decreasing physical activities, implying social media being an effective tool in promoting physical activities during the lockdown and subsequent restrictions., (© 2021 John Wiley & Sons Ltd.)
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- 2022
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33. The role of self-reported stressors in recovery from Exhaustion Disorder: a longitudinal study.
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Eklöf B, Larsson H, Ellbin S, Jonsdottir IH, O'Dwyer S, and Hansson C
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- Caregivers, Humans, Longitudinal Studies, Self Report, Fatigue psychology, Stress, Psychological psychology
- Abstract
Background: Exhaustion disorder (ED) is a stress-induced disorder characterized by physical and mental symptoms of exhaustion that can be long-lasting. Although stress exposure is essential for the development of ED, little is known regarding the role of stressors in the maintenance of ED. The aim of the study was to investigate the role of work-related stressors, private-related stressors, and adverse childhood experiences in long-term recovery from ED., Methods: A mixed methods design was used. The design was sequential, and data analysis was performed in two parts, where the first part consisted of qualitative analysis of patient records, and the second part consisted of statistical analysis of the data retrieved from the qualitative coding. Patient records from 150 patients with ED was analysed regarding work-related stressors, private-related stressors, and adverse childhood experiences. For each patient, two patient records were analysed, one from the time of diagnosis (baseline) and one from the follow-up clinical assessment, 7-12 years after diagnosis (follow-up). Out of the 150 patients, 51 individuals still fulfilled the diagnostic criteria for ED at follow-up (ED group) and 99 individuals no longer fulfilled the diagnostic criteria and were thus considered recovered (EDrec). Percentages in each group (ED and EDrec) reporting each stressor at baseline and follow-up were calculated as well as the differences in percentage points between the groups along with the 95% confidence intervals for the differences., Results: At baseline, significantly more EDrec patients reported quantitative demands (73% EDrec, 53% ED) and managerial responsibilities (14% EDrec, 2% ED). Private-related stressors did not differ at baseline. At follow-up, significantly more ED patients reported managerial responsibilities (8 ED, 0% EDrec) and caregiver stress (child) (24% ED, 6% EDrec) and significantly more EDrec patients reported caregiver stress (parent) (6% EDrec, 0% ED). There were no differences regarding adverse childhood experiences., Conclusions: The main conclusion is that neither adverse childhood experiences nor any of the stressors at baseline are associated with long-term ED. Ongoing stressors related to having responsibility for other people, such as managerial responsibilities or caring for a child with a chronic disease or psychiatric disorder, may be associated with long-term exhaustion., (© 2022. The Author(s).)
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- 2022
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34. Unpaid carers are the missing piece in treatment guidelines and research priorities for ME/CFS.
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O'Dwyer S, Boothby S, Smith G, Biddle L, Muirhead N, and Khot S
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- Caregivers, Employment, Humans, Qualitative Research, Fatigue Syndrome, Chronic therapy
- Abstract
Competing Interests: Competing interests: None declared.
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- 2022
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35. Insulin Null β-cells Have a Prohormone Processing Defect That Is Not Reversed by AAV Rescue of Proinsulin Expression.
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Ramzy A, Edeer N, Baker RK, O'Dwyer S, Mojibian M, Verchere CB, and Kieffer TJ
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- Animals, Humans, Insulin metabolism, Mice, Mice, Knockout, Rats, Insulin-Secreting Cells metabolism, Proinsulin genetics, Proinsulin metabolism
- Abstract
Up to 6% of diabetes has a monogenic cause including mutations in the insulin gene, and patients are candidates for a gene therapy. Using a mouse model of permanent neonatal diabetes, we assessed the efficacy of an adeno-associated virus (AAV)-mediated gene therapy. We used AAVs with a rat insulin 1 promoter (Ins1) regulating a human insulin gene (INS; AAV Ins1-INS) or native mouse insulin 1 (Ins1; AAV Ins-Ins1) to deliver an insulin gene to β-cells of constitutive insulin null mice (Ins1-/-Ins2-/-) and adult inducible insulin-deficient mice [Ins1-/-Ins2f/f PdxCreER and Ins1-/-Ins2f/f mice administered AAV Ins1-Cre)]. Although AAV Ins1-INS could successfully infect and confer insulin expression to β-cells, insulin null β-cells had a prohormone processing defect. Secretion of abundant proinsulin transiently reversed diabetes. We reattempted therapy with AAV Ins1-Ins1, but Ins1-/-Ins2-/- β-cells still had a processing defect of both replaced Ins1 and pro-islet amyloid polypeptide (proIAPP). In adult inducible models, β-cells that lost insulin expression developed a processing defect that resulted in impaired proIAPP processing and elevated circulating proIAPP, and cells infected with AAV Ins1-Ins1 to rescue insulin expression secreted proinsulin. We assessed the subcellular localization of prohormone convertase 1/3 (PC1/3) and detected defective sorting of PC1/3 to glycogen-containing vacuoles and retention in the endoplasmic reticulum as a potential mechanism underlying defective processing. We provide evidence that persistent production of endogenous proinsulin within β-cells is necessary for β-cells to be able to properly store and process proinsulin., (© The Author(s) 2022. Published by Oxford University Press on behalf of the Endocrine Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2022
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36. Obesity in Adults: A 2022 Adapted Clinical Practice Guideline for Ireland.
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Breen C, O'Connell J, Geoghegan J, O'Shea D, Birney S, Tully L, Gaynor K, O'Kelly M, O'Malley G, O'Donovan C, Lyons O, Flynn M, Allen S, Arthurs N, Browne S, Byrne M, Callaghan S, Collins C, Courtney A, Crotty M, Donohue C, Donovan C, Dunlevy C, Duggan D, Fearon N, Finucane F, Fitzgerald I, Foy S, Garvey J, Gibson I, Glynn L, Gregg E, Griffin A, Harrington JM, Heary C, Heneghan H, Hogan A, Hynes M, Kearney C, Kelly D, Neff K, le Roux CW, Manning S, McAuliffe F, Moore S, Moran N, Murphy M, Murrin C, O'Brien SM, O'Donnell C, O'Dwyer S, O'Grada C, O'Malley E, O'Reilly O, O'Reilly S, Porter O, Roche HM, Rhynehart A, Ryan L, Seery S, Soare C, Shaamile F, Walsh A, Woods C, Woods C, and Yoder R
- Subjects
- Adult, Humans, Ireland, Canada, Weight Loss, Chronic Disease, Obesity therapy, Obesity psychology, Overweight therapy
- Abstract
Background: This Clinical Practice Guideline (CPG) for the management of obesity in adults in Ireland, adapted from the Canadian CPG, defines obesity as a complex chronic disease characterised by excess or dysfunctional adiposity that impairs health. The guideline reflects substantial advances in the understanding of the determinants, pathophysiology, assessment, and treatment of obesity., Summary: It shifts the focus of obesity management toward improving patient-centred health outcomes, functional outcomes, and social and economic participation, rather than weight loss alone. It gives recommendations for care that are underpinned by evidence-based principles of chronic disease management; validate patients' lived experiences; move beyond simplistic approaches of "eat less, move more" and address the root drivers of obesity., Key Messages: People living with obesity face substantial bias and stigma, which contribute to increased morbidity and mortality independent of body weight. Education is needed for all healthcare professionals in Ireland to address the gap in skills, increase knowledge of evidence-based practice, and eliminate bias and stigma in healthcare settings. We call for people living with obesity in Ireland to have access to evidence-informed care, including medical, medical nutrition therapy, physical activity and physical rehabilitation interventions, psychological interventions, pharmacotherapy, and bariatric surgery. This can be best achieved by resourcing and fully implementing the Model of Care for the Management of Adult Overweight and Obesity. To address health inequalities, we also call for the inclusion of obesity in the Structured Chronic Disease Management Programme and for pharmacotherapy reimbursement, to ensure equal access to treatment based on health-need rather than ability to pay., (© 2022 The Author(s). Published by S. Karger AG, Basel.)
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- 2022
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37. Deletion of pancreas-specific miR-216a reduces beta-cell mass and inhibits pancreatic cancer progression in mice.
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Erener S, Ellis CE, Ramzy A, Glavas MM, O'Dwyer S, Pereira S, Wang T, Pang J, Bruin JE, Riedel MJ, Baker RK, Webber TD, Lesina M, Blüher M, Algül H, Kopp JL, Herzig S, and Kieffer TJ
- Subjects
- Animals, Apoptosis, Base Sequence, Cell Line, Tumor, Cell Movement, Diet, High-Fat, Humans, Insulin Secretion, Mice, Inbred C57BL, Mice, Knockout, MicroRNAs metabolism, Organ Specificity, Rats, Mice, Disease Progression, Gene Deletion, Insulin-Secreting Cells metabolism, Insulin-Secreting Cells pathology, MicroRNAs genetics, Pancreatic Neoplasms genetics, Pancreatic Neoplasms pathology
- Abstract
miRNAs have crucial functions in many biological processes and are candidate biomarkers of disease. Here, we show that miR-216a is a conserved, pancreas-specific miRNA with important roles in pancreatic islet and acinar cells. Deletion of miR-216a in mice leads to a reduction in islet size, β-cell mass, and insulin levels. Single-cell RNA sequencing reveals a subpopulation of β-cells with upregulated acinar cell markers under a high-fat diet. miR-216a is induced by TGF-β signaling, and inhibition of miR-216a increases apoptosis and decreases cell proliferation in pancreatic cells. Deletion of miR-216a in the pancreatic cancer-prone mouse line Kras
G12D ;Ptf1aCreER reduces the propensity of pancreatic cancer precursor lesions. Notably, circulating miR-216a levels are elevated in both mice and humans with pancreatic cancer. Collectively, our study gives insights into how β-cell mass and acinar cell growth are modulated by a pancreas-specific miRNA and also suggests miR-216a as a potential biomarker for diagnosis of pancreatic diseases., Competing Interests: The authors declare no competing interests., (© 2021 The Author(s).)- Published
- 2021
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38. Worth the Weight? Olanzapine Prescribing in Schizophrenia. A Review of Weight Gain and Other Cardiometabolic Side Effects of Olanzapine.
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Fitzgerald I, O'Dwyer S, Brooks M, Sahm L, Crowley E, and Ní Dhubhlaing C
- Abstract
Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
- Published
- 2021
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39. The involvement of people with dementia in advocacy: a systematic narrative review.
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Weetch J, O'Dwyer S, and Clare L
- Subjects
- Humans, Dementia
- Abstract
Methods: A systematic search and narrative synthesis of original research was conducted. Searches in Pubmed, Web of Science, PsychINFO and CINAHL followed PRISMA Guidelines. The review focused on people with dementia involved in advocacy. There were no restrictions based on study design or date. Language was limited to English., Results: Seven papers were identified, with predominantly qualitative methodologies. Four overarching themes were identified: threats, fighting back, evolving identities and making a difference. Threats ranged from those arising from dementia as an illness, to exposure to stigma. Fighting back represented advocates' response to these threats, often described using martial metaphors. Evolving identities captured advocates' journeys through diagnosis to involvement in advocacy and subsequent impact upon identity. Making a difference represented the impact of dementia advocacy at an individual, community and societal level., Conclusions: This review confirms that the threats associated with dementia extend beyond the symptoms of illness. Dementia advocacy offers potential improvements in well-being for those involved, through the activity itself and via extended social networks. There is little research on broader aspects of advocates' identity, including ethnicity, gender, and age. There has been little attempt to quantify the impact of dementia advocacy.
- Published
- 2021
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40. Loneliness, physical activity, and mental health during COVID-19: a longitudinal analysis of depression and anxiety in adults over the age of 50 between 2015 and 2020.
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Creese B, Khan Z, Henley W, O'Dwyer S, Corbett A, Vasconcelos Da Silva M, Mills K, Wright N, Testad I, Aarsland D, and Ballard C
- Subjects
- Aged, Aged, 80 and over, Aging, Anxiety etiology, Depression etiology, Female, Humans, Male, Middle Aged, Pandemics, Physical Distancing, Risk Factors, Sedentary Behavior, Stress, Psychological, Anxiety epidemiology, COVID-19 psychology, Depression epidemiology, Exercise, Loneliness psychology, Mental Health
- Abstract
Objective: Loneliness and physical activity are important targets for research into the impact of COVID-19 because they have established links with mental health, could be exacerbated by social distancing policies, and are potentially modifiable. In this study, we aimed to identify whether loneliness and physical activity were associated with worse mental health during a period of mandatory social distancing in the UK., Design: Population-based observational cohort study., Setting: Mental health data collected online during COVID-19 from an existing sample of adults aged 50 and over taking part in a longitudinal study of aging. All had comparable annual data collected between 2015 and 2019., Participants: Three-thousand two-hundred and eighty-one participants aged 50 and over., Measurements: Trajectories of depression (measured by PHQ-9) and anxiety (measured by GAD-7) between 2015 and 2020 were analyzed with respect to loneliness, physical activity levels, and a number of socioeconomic and demographic characteristics using zero-inflated negative binomial regression., Results: In 2020, PHQ-9 score for loneliness, adjusted for covariates, was 3.23 (95% CI: 3.01-3.44), an increase of around 1 point on all previous years in this group and 2 points higher than people not rated lonely, whose score did not change in 2020 (1.22, 95% CI: 1.12-1.32). PHQ-9 was 2.60 (95% CI: 2.43-2.78) in people with decreased physical activity, an increase of .5 on previous years. In contrast, PHQ-9 in 2020 for people whose physical activity had not decreased was 1.66, 95% CI: 1.56-1.75, similar to previous years. A similar relationship was observed for GAD-7 though the absolute burden of symptoms lower., Conclusion: After accounting for pre-COVID-19 trends, we show that experiencing loneliness and decreased physical activity are risk factors for worsening mental health during the pandemic. Our findings highlight the need to examine policies which target these potentially modifiable risk factors.
- Published
- 2021
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41. Cytoreductive surgery (CRS) with hyperthermic intraoperative peritoneal chemotherapy (HIPEC) versus standard of care (SoC) in people with peritoneal metastases from colorectal, ovarian or gastric origin: protocol for a systematic review and individual participant data (IPD) meta-analyses of effectiveness and cost-effectiveness.
- Author
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Gurusamy K, Vale CL, Pizzo E, Bhanot R, Davidson BR, Mould T, Mughal M, Saunders M, Aziz O, and O'Dwyer S
- Subjects
- Female, Humans, Male, Colorectal Neoplasms complications, Colorectal Neoplasms pathology, Colorectal Neoplasms therapy, Combined Modality Therapy, Cost-Benefit Analysis statistics & numerical data, Cost-Benefit Analysis trends, Disease Progression, Disease-Free Survival, Ovarian Neoplasms complications, Ovarian Neoplasms pathology, Ovarian Neoplasms therapy, Prognosis, Quality of Life, Randomized Controlled Trials as Topic, Sensitivity and Specificity, State Medicine organization & administration, Stomach Neoplasms complications, Stomach Neoplasms pathology, Stomach Neoplasms therapy, United Kingdom epidemiology, Meta-Analysis as Topic, Systematic Reviews as Topic, Cytoreduction Surgical Procedures methods, Hyperthermic Intraperitoneal Chemotherapy methods, Peritoneal Neoplasms mortality, Peritoneal Neoplasms secondary, Peritoneal Neoplasms therapy, Standard of Care statistics & numerical data
- Abstract
Introduction: There is uncertainty about whether cytoreductive surgery (CRS)+hyperthermic intraoperative peritoneal chemotherapy (HIPEC) improves survival and/or quality of life compared with standard of care (SoC) in people with peritoneal metastases who can withstand major surgery., Primary Objectives: To compare the relative benefits and harms of CRS+HIPEC versus SoC in people with peritoneal metastases from colorectal, ovarian or gastric cancers eligible to undergo CRS+HIPEC by a systematic review and individual participant data (IPD) meta-analysis., Secondary Objectives: To compare the cost-effectiveness of CRS+HIPEC versus SoC from a National Health Service (NHS) and personal social services perspective using a model-based cost-utility analysis., Methods and Analysis: We will perform a systematic review of literature by updating the searches from MEDLINE, Embase, Cochrane library, Science Citation Index as well as trial registers. Two members of our team will independently screen the search results and identify randomised controlled trials comparing CRS+HIPEC versus SoC for inclusion based on full texts for articles shortlisted during screening. We will assess the risk of bias in the trials and obtain data related to baseline prognostic characteristics, details of intervention and control, and outcome data related to overall survival, disease progression, health-related quality of life, treatment related complications and resource utilisation data. Using IPD, we will perform a two-step IPD, that is, calculate the adjusted effect estimate from each included study and then perform a random-effects model meta-analysis. We will perform various subgroup analyses, meta-regression and sensitivity analyses. We will also perform a model-based cost-utility analysis to assess whether CRS+HIPEC is cost-effective in the NHS setting., Ethics and Dissemination: This project was approved by the UCL Research Ethics Committee (Ethics number: 16023/001). We aim to present the findings at appropriate international meetings and publish the review, irrespective of the findings, in a peer-reviewed journal., Prospero Registration Number: CRD42019130504., Competing Interests: Competing interests: The clinical practice of the clinicians in the project: TM, MM, MS, OA and SO may be altered by the findings of the review., (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.)
- Published
- 2020
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42. Identifying people with dementia on Twitter.
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Talbot C, O'Dwyer S, Clare L, Heaton J, and Anderson J
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- Adult, Aged, Aged, 80 and over, Female, Humans, Internet, Male, Middle Aged, Dementia psychology, Social Media
- Published
- 2020
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- View/download PDF
43. Personalized Biofeedback on Inhaler Adherence and Technique by Community Pharmacists: A Cluster Randomized Clinical Trial.
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O'Dwyer S, Greene G, MacHale E, Cushen B, Sulaiman I, Boland F, Bosnic-Anticevich S, Mokoka MC, Reilly RB, Taylor T, Ryder SA, and Costello RW
- Subjects
- Administration, Inhalation, Biofeedback, Psychology, Humans, Medication Adherence, Nebulizers and Vaporizers, Quality of Life, Pharmacists, Pulmonary Disease, Chronic Obstructive drug therapy
- Abstract
Background: Guidelines recommend that patients treated with inhalers receive adherence counseling and device training. Digital technologies that assess both inhaler adherence and technique have been developed. Using these technologies community pharmacists, who have regular contact with patients, are well placed to deliver personalized inhaler education., Objective: To determine the impact of a pharmacist intervention, informed by digital technology, on inhaler technique and adherence of patients with asthma in the community., Methods: A cluster randomized, parallel-group, multisite pharmacy study was conducted over 6 months. All study groups had an electronic device (inhaler compliance assessment device) attached to their maintenance inhaler. A biofeedback group received personalized inhaler training informed by data recorded by the device. The demonstration group received inhaler training, by physical demonstration with a placebo inhaler. The control group received usual care. The primary outcome was inhaler adherence, which was classified as "actual adherence" and expressed as the proportion of expected drug accumulation if adherence and technique had been perfect. Secondary outcomes were quality-of-life scores as measured by the St George's Respiratory Questionnaire, symptoms, and exacerbations., Results: A total of 152 participants (n = 74 biofeedback, n = 56 demonstration, and n = 22 control) were recruited. Asthma was the predominant condition among participants (n = 83), with chronic obstructive pulmonary disease (n = 55) and asthma/chronic obstructive pulmonary disease overlap also reported (n = 8). In intention-to-treat analysis, adherence in the biofeedback group during month 2 was 62%, 18% higher (95% CI, 6 to 30) than that in the demonstration group (P = .004) and 24% higher (95% CI, 9 to 40) than that in the control group (P = .003). During month 6, adherence was 14% higher (95% CI, -1 to 30; P = .07) in the biofeedback group than in the demonstration group and 31% higher (95% CI, 13 to 48; P = .001) than in the control group. At the end of the study, the biofeedback group had a sustained fall in St George's Respiratory Questionnaire from baseline, -6.1 (95% CI, -9 to -0.4; P = .04) and had significantly improved daily respiratory symptoms., Conclusions: Community pharmacist-delivered inhaler training informed by a digital technology improved adherence and health status., (Copyright © 2019 American Academy of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2020
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44. Long-term metabolic consequences of acute dioxin exposure differ between male and female mice.
- Author
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Hoyeck MP, Blair H, Ibrahim M, Solanki S, Elsawy M, Prakash A, Rick KRC, Matteo G, O'Dwyer S, and Bruin JE
- Subjects
- Animals, Diabetes Mellitus etiology, Disease Models, Animal, Female, Homeostasis, Humans, Hypoglycemia, Insulin metabolism, Insulin Secretion, Male, Mice, Mice, Inbred C57BL, Risk, Diabetes Mellitus epidemiology, Environmental Pollutants adverse effects, Insulin-Secreting Cells physiology, Polychlorinated Dibenzodioxins adverse effects, Sex Factors
- Abstract
Epidemiological studies have consistently shown an association between exposure to environmental pollutants and diabetes risk in humans. We have previously shown that direct exposure of mouse and human islets (endocrine pancreas) to the highly persistent pollutant TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin) causes reduced insulin secretion ex vivo. Furthermore, a single high-dose of TCDD (200 µg/kg) suppressed both fasting and glucose-induced plasma insulin levels and promoted beta-cell apoptosis after 7 days in male mice. The current study investigated the longer-term effects of a single high-dose TCDD injection (20 µg/kg) on glucose metabolism and beta cell function in male and female C57Bl/6 mice. TCDD-exposed males displayed modest fasting hypoglycemia for ~4 weeks post-injection, reduced fasting insulin levels for up to 6 weeks, increased insulin sensitivity, decreased beta cell area, and increased delta cell area. TCDD-exposed females also had long-term suppressed basal plasma insulin levels, and abnormal insulin secretion for up to 6 weeks. Unlike males, TCDD did not impact insulin sensitivity or islet composition in females, but did cause transient glucose intolerance 4 weeks post-exposure. Our results show that a single exposure to dioxin can suppress basal insulin levels long-term in both sexes, but effects on glucose homeostasis are sex-dependent.
- Published
- 2020
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45. Functional cytochrome P450 1A enzymes are induced in mouse and human islets following pollutant exposure.
- Author
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Ibrahim M, MacFarlane EM, Matteo G, Hoyeck MP, Rick KRC, Farokhi S, Copley CM, O'Dwyer S, and Bruin JE
- Subjects
- Animals, Blood Glucose drug effects, Cell Line, Cytochrome P-450 CYP1A1 genetics, Cytochrome P-450 CYP1A2 genetics, Hep G2 Cells, Humans, Male, Mice, Mice, Inbred C57BL, Mice, Knockout, Polychlorinated Dibenzodioxins toxicity, Real-Time Polymerase Chain Reaction, Cytochrome P-450 CYP1A1 metabolism, Cytochrome P-450 CYP1A2 metabolism, Environmental Pollutants toxicity
- Abstract
Aims/hypothesis: Exposure to environmental pollution has been consistently linked to diabetes incidence in humans, but the potential causative mechanisms remain unclear. Given the critical role of regulated insulin secretion in maintaining glucose homeostasis, environmental chemicals that reach the endocrine pancreas and cause beta cell injury are of particular concern. We propose that cytochrome P450 (CYP) enzymes, which are involved in metabolising xenobiotics, could serve as a useful biomarker for direct exposure of islets to pollutants. Moreover, functional CYP enzymes in islets could also impact beta cell physiology. The aim of this study was to determine whether CYP1A enzymes are activated in islets following direct or systemic exposure to environmental pollutants., Methods: Immortalised liver (HepG2) and rodent pancreatic endocrine cell lines (MIN6, βTC-6, INS1, α-TC1, α-TC3), as well as human islets, were treated in vitro with known CYP1A inducers 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and 3-methylcholanthrene (3-MC). In addition, mice were injected with either a single high dose of TCDD or multiple low doses of TCDD in vivo, and islets were isolated 1, 7 or 14 days later., Results: CYP1A enzymes were not activated in any of the immortalised beta or alpha cell lines tested. However, both 3-MC and TCDD potently induced CYP1A1 gene expression and modestly increased CYP1A1 enzyme activity in human islets after 48 h. The induction of CYP1A1 in human islets by TCDD was prevented by cotreatment with a cytokine mixture. After a systemic single high-dose TCDD injection, CYP1A1 enzyme activity was induced in mouse islets ~2-fold, ~40-fold and ~80-fold compared with controls after 1, 7 and 14 days, respectively, in vivo. Multiple low-dose TCDD exposure in vivo also caused significant upregulation of Cyp1a1 in mouse islets. Direct TCDD exposure to human and mouse islets in vitro resulted in suppressed glucose-induced insulin secretion. A single high-dose TCDD injection resulted in lower plasma insulin levels, as well as a pronounced increase in beta cell death., Conclusions/interpretation: Transient exposure to TCDD results in long-term upregulation of CYP1A1 enzyme activity in islets. This provides evidence for direct exposure of islets to lipophilic pollutants in vivo and may have implications for islet physiology.
- Published
- 2020
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46. Pharmacy-based interventions to increase vaccine uptake: report of a multidisciplinary stakeholders meeting.
- Author
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Ecarnot F, Crepaldi G, Juvin P, Grabenstein J, Del Giudice G, Tan L, O'Dwyer S, Esposito S, Bosch X, Gavazzi G, Papastergiou J, Gaillat J, Johnson R, Fonzo M, Rossanese A, Suitner C, Barratt J, di Pasquale A, Maggi S, and Michel JP
- Subjects
- Adult, Congresses as Topic, Europe, Female, Humans, Italy, Male, Middle Aged, Organizational Objectives, Professional Role, Health Promotion methods, Patient Acceptance of Health Care psychology, Patient Acceptance of Health Care statistics & numerical data, Pharmaceutical Services organization & administration, Pharmacists, Vaccination psychology, Vaccination statistics & numerical data
- Abstract
Background: Despite the existence of efficacious vaccines, the burden of vaccine-preventable diseases remains high and the potential health benefits of paediatric, adolescent and adult vaccination are not being achieved due to suboptimal vaccine coverage rates. Based on emerging evidence that pharmacy-based vaccine interventions are feasible and effective, the European Interdisciplinary Council for Ageing (EICA) brought together stakeholders from the medical and pharmacy professions, the pharmaceutical industry, patient/ageing organisations and health authorities to consider the potential for pharmacy-based interventions to increase vaccine uptake. We report here the proceedings of this 3-day meeting held in March 2018 in San Servolo island, Venice, Italy, focussing firstly on examples from countries that have introduced pharmacy-based vaccination programmes, and secondly, listing the barriers and solutions proposed by the discussion groups., Conclusions: A range of barriers to vaccine uptake have been identified, affecting all target groups, and in various countries and healthcare settings. Ease of accessibility is a potentially modifiable determinant in vaccine uptake, and thus, improving the diversity of settings where vaccines can be provided to adults, for example by enabling community pharmacists to vaccinate, may increase the number of available opportunities for vaccination.
- Published
- 2019
- Full Text
- View/download PDF
47. Follow-Up Recommendations after Curative Resection of Well-Differentiated Neuroendocrine Tumours: Review of Current Evidence and Clinical Practice.
- Author
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Lamarca A, Clouston H, Barriuso J, McNamara MG, Frizziero M, Mansoor W, Hubner RA, Manoharan P, O'Dwyer S, and Valle JW
- Abstract
The incidence of neuroendocrine neoplasms (NENs) is increasing, especially for patients with early stages and grade 1 tumours. Current evidence also shows increased prevalence, probably reflecting earlier stage diagnosis and improvement of treatment options. Definition of adequate postsurgical follow-up for NENs is a current challenge. There are limited guidelines, and heterogeneity in adherence to those available is notable. Unfortunately, the population of patients at greatest risk of recurrence has not been defined clearly. Some studies support that for patients with pancreatic neuroendocrine tumours (PanNETs), factors such as primary tumour (T), stage, grade (Ki-67), tumour size, and lymph node metastases (N) are of relevance. For bronchial neuroendocrine tumours (LungNETs) and small intestinal neuroendocrine tumours (siNETs), similar factors have been identified. This review summarises the evidence supporting the rationale behind follow-up after curative resection in well-differentiated PanNETs, siNETs, and LungNETS. Published evidence informing relapse rate, disease-free survival, and relapse patterns are discussed, together with an overview of current guidelines informing postsurgical investigations and duration of follow-up.
- Published
- 2019
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- View/download PDF
48. A stochastic model of ion channel cluster formation in the plasma membrane.
- Author
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Sato D, Hernández-Hernández G, Matsumoto C, Tajada S, Moreno CM, Dixon RE, O'Dwyer S, Navedo MF, Trimmer JS, Clancy CE, Binder MD, and Santana LF
- Subjects
- Calcium Channels genetics, Cluster Analysis, Computer Simulation, Humans, Muscle, Smooth, Vascular cytology, Calcium Channels metabolism, Cell Membrane physiology, Models, Biological, Myocytes, Cardiac physiology, Neurons physiology, Stochastic Processes
- Abstract
Ion channels are often found arranged into dense clusters in the plasma membranes of excitable cells, but the mechanisms underlying the formation and maintenance of these functional aggregates are unknown. Here, we tested the hypothesis that channel clustering is the consequence of a stochastic self-assembly process and propose a model by which channel clusters are formed and regulated in size. Our hypothesis is based on statistical analyses of the size distributions of the channel clusters we measured in neurons, ventricular myocytes, arterial smooth muscle, and heterologous cells, which in all cases were described by exponential functions, indicative of a Poisson process (i.e., clusters form in a continuous, independent, and memory-less fashion). We were able to reproduce the observed cluster distributions of five different types of channels in the membrane of excitable and tsA-201 cells in simulations using a computer model in which channels are "delivered" to the membrane at randomly assigned locations. The model's three parameters represent channel cluster nucleation, growth, and removal probabilities, the values of which were estimated based on our experimental measurements. We also determined the time course of cluster formation and membrane dwell time for Ca
V 1.2 and TRPV4 channels expressed in tsA-201 cells to constrain our model. In addition, we elaborated a more complex version of our model that incorporated a self-regulating feedback mechanism to shape channel cluster formation. The strong inference we make from our results is that CaV 1.2, CaV 1.3, BK, and TRPV4 proteins are all randomly inserted into the plasma membranes of excitable cells and that they form homogeneous clusters that increase in size until they reach a steady state. Further, it appears likely that cluster size for a diverse set of membrane-bound proteins and a wide range of cell types is regulated by a common feedback mechanism., (© 2019 Sato et al.)- Published
- 2019
- Full Text
- View/download PDF
49. Burning mouth syndrome-a diagnostic dilemma.
- Author
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Ni Riordain R, O'Dwyer S, and McCreary C
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Burning Mouth Syndrome diagnosis
- Abstract
Background: Burning mouth syndrome (BMS) is a chronic pain disorder, more common in peri and postmenopausal females, with a varied symptomatology. Symptoms include a burning or stinging sensation of the tongue, lips or other oral mucosal surfaces, subjectively dry mouth or excess saliva, altered taste or loss of taste and paraesthetic sensations. These are usually present daily for more than 3 months., Aims: The aims of this study were to highlight the symptomatic manifestations of BMS along with the need for prompt diagnosis and onward referral when necessary., Methods: A cross-sectional study of patients with idiopathic BMS was conducted. The presenting symptoms, time to diagnosis and number of clinicians seen in advance of a diagnosis of BMS and anxiety and depression as determined by the Hospital Anxiety and Depression Scale (HADS) was recorded. Correlations were explored., Results: Fifty patients were enrolled in this study (38, F:12, M). The average time from onset of symptoms to diagnosis was 13 months. Commonly reported symptoms included burning (n = 44) and altered taste (n = 14). The median anxiety score was 13 and the median depression score was 10. No statistically significant correlations were found between the anxiety and depression scores generated and the number of clinicians seen or the time to diagnosis., Conclusion: The results of this study indicate that there is a need for an increased awareness of the symptoms reported in BMS, particularly in peri and postmenopausal women. This should aid prompt diagnosis and may alleviate some of the anxiety that patients may experience.
- Published
- 2019
- Full Text
- View/download PDF
50. Laparoscopic Cytoreductive Surgery with Hyperthermic Intraperitoneal Chemotherapy (L-CRS/HIPEC) for Perforated Low-Grade Appendiceal Mucinous Neoplasm (LAMN II).
- Author
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Parkin E, Selvasekar C, Wilson M, Renehan A, O'Dwyer S, and Aziz O
- Subjects
- Adenocarcinoma, Mucinous pathology, Appendiceal Neoplasms pathology, Combined Modality Therapy, Humans, Neoplasm Grading, Peritoneal Neoplasms pathology, Video Recording, Adenocarcinoma, Mucinous therapy, Appendiceal Neoplasms therapy, Cytoreduction Surgical Procedures methods, Hyperthermia, Induced methods, Laparoscopy methods, Peritoneal Neoplasms therapy
- Abstract
Introduction: Cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (CRS/HIPEC) is an established treatment for pseudomyxoma peritonei resulting from a perforated low-grade appendiceal mucinous neoplasm (LAMN II). In patients with localized disease, a laparoscopic procedure (L-CRS/HIPEC) can be undertaken., Methods: This video demonstrates L-CRS/HIPEC in a 66-year-old male who had previously undergone an appendicectomy for an LAMN II lesion. The preoperative computed tomography (CT) scan suggested disease localized to the right iliac fossa. However, laparoscopic assessment unexpectedly revealed disease in the pelvis and on the right hemidiaphragm and liver surface., Results: A technique for treating the thin film of mucin in the pelvis and on the right hemidiaphragm is demonstrated. The liver is mobilized to facilitate ablation of mucin on the serosal surface of the right lobe. Tips and tricks for starting the omentectomy, dealing with the vascular pedicle, and completing the dissection in the left upper quadrant are shown. The Peritoneal Cancer Index (PCI) score was 5 (3 for the right upper quadrant, 1 for the pelvis, 1 for the small bowel), and the cytoreduction score was CC-1. The operative duration was 8.5 h, and length of hospital stay was 5 days. The patient returned to work after 6 weeks., Discussion: L-CRS/HIPEC can be performed when patients are unexpectedly found to have disease, provided the appendiceal pathology is low grade and the PCI score is low. There are potential benefits to this approach, with a shorter length of hospital stay and faster functional recovery when compared with traditional open surgery.
- Published
- 2019
- Full Text
- View/download PDF
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