24 results on '"K. O'Sullivan"'
Search Results
2. PCR Incorporation of Polyoxometalate Modified Deoxynucleotide Triphosphates and Their Application in Molecular Electrochemical Sensing of Yersinia pestis
- Author
-
Mayreli Ortiz, Markéta Svobodová, Ciara K. O'Sullivan, Denis Lesage, Bernold Hasenknopf, Serge Thorimbert, Richard B. Cole, Ahmed M. Debela, Glycochimie Organique Biologique et Supramoléculaire (GOBS), Institut Parisien de Chimie Moléculaire (IPCM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Chemical Biology (CHEMBIO), Chimie Structurale Organique et Biologique (CSOB), and Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
DNA, Bacterial ,Yersinia pestis ,[SDV]Life Sciences [q-bio] ,Sequence (biology) ,010402 general chemistry ,Polymerase Chain Reaction ,01 natural sciences ,Redox ,Catalysis ,chemistry.chemical_compound ,[CHIM]Chemical Sciences ,Nucleotide ,A-DNA ,Electrodes ,ComputingMilieux_MISCELLANEOUS ,Polymerase ,chemistry.chemical_classification ,biology ,Nucleotides ,010405 organic chemistry ,Organic Chemistry ,Electrochemical Techniques ,General Chemistry ,Tungsten Compounds ,biology.organism_classification ,Electrophoresis, Gel, Pulsed-Field ,0104 chemical sciences ,Biochemistry ,chemistry ,Polyoxometalate ,biology.protein ,Gold ,DNA - Abstract
Redox-labeled nucleotides are of increasing interest for the fabrication of next generation molecular tools and should meet requirements of being thermally stable, sensitive, and compatible with polymerase-mediated incorporation while also being electrochemically discriminable. The synthesis and characterization of Keggin and Dawson polyoxometalate-deoxynucleotide (POM-dNTP) bioconjugates linked through 7-deaza-modified purines is described. The modified POM-dNTPs were used for polymerase-based amplification of a DNA sequence specific for Yersinia pestis and the amplified DNA detected using an electrochemical DNA sensor. This highlights the potential of polyoxometalates as thermally stable, sensitive and polymerase-compatible redox labels for exploitation in bioanalytical applications.
- Published
- 2017
3. Cover Feature: Tuning of Oxidation Potential of Ferrocene for Ratiometric Redox Labeling and Coding of Nucleotides and DNA (Chem. Eur. J. 6/2020)
- Author
-
Miroslav Fojta, Radek Pohl, Veronika Sýkorová, Anna Simonova, Michal Hocek, Ivan Magriñá, Luděk Havran, Ciara K. O'Sullivan, and Mayreli Ortiz
- Subjects
chemistry.chemical_classification ,chemistry.chemical_compound ,Ferrocene ,Chemistry ,Organic Chemistry ,Nucleotide ,General Chemistry ,Electrochemistry ,Combinatorial chemistry ,Redox ,Catalysis ,DNA ,Nucleobase - Published
- 2019
4. Bleed-to-read disposable microsystems for the genetic and serological analysis of celiac disease markers with amperometric detection
- Author
-
Julian Höth, Ciara K. O'Sullivan, Richard Klemm, Kristina Lind, Hamdi Joda, Alex Fragoso, Valerio Beni, Mayreli Ortiz, and Ioanis Katakis
- Subjects
business.industry ,Clinical Biochemistry ,Nanotechnology ,Computational biology ,Human leukocyte antigen ,Bleed ,Lab-on-a-chip ,Biochemistry ,Analytical Chemistry ,law.invention ,Serology ,Genetic marker ,law ,Microsystem ,Medicine ,Disease markers ,business - Abstract
Celiac disease is an auto-immune disorder induced by ingestion of gluten in genetically predisposed individuals. Its diagnostics is more accurate using a combination of immunologic and genetic tests to detect of high levels of certain auto-antibodies and the presence human leukocyte antigen HLA-DQ2 or HLA-DQ8 genetic markers. In this work, we report the design and testing of automated microsystems combining sample treatment, storage, fluidic transport, and detection in a single platform able to carry out genetic or serologic analysis for detection of celiac disease markers. These microsystems share a common footprint and many fluidic features and are thus able to perform a complete assay. The microsystem for the genetic assay extracts and amplifies the DNA prior to detection, while the serology microsystem contains a filter and chamber for the generation and subsequent dilution of plasma. The performance of both platforms is demonstrated and compared with reference methods with an excellent correlation, which makes the developed platform amenable for clinical studies.
- Published
- 2015
5. Aptamers for Analysis: Nucleic Acids Ligands in the Post‐Genomic Era
- Author
-
Ciara K. O'Sullivan, Pedro Nadal, Markéta Svobodová, and Alessandro Pinto
- Subjects
Aptamer ,Nucleic acid ,Computational biology ,Biology ,Combinatorial chemistry ,Systematic evolution of ligands by exponential enrichment - Published
- 2011
6. Three-dimensional Arrangement of Short DNA Oligonucleotides at Surfaces via the Synthesis of DNA-branched Polyacrylamide Brushes by SI-ATRP
- Author
-
Olivier Y.F. Henry, Josep Luis Acero Sanchez, Ciara K. O'Sullivan, Sinead Kirwan, and Ahmed D. Mehdi
- Subjects
chemistry.chemical_classification ,Materials science ,Polymers and Plastics ,Atom-transfer radical-polymerization ,Oligonucleotide ,Aptamer ,Organic Chemistry ,Polyacrylamide ,02 engineering and technology ,Polymer ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,Monomer ,chemistry ,Polymer chemistry ,Materials Chemistry ,Nucleic acid ,0210 nano-technology ,DNA - Abstract
Short DNA oligonucleotide branches are incorporated into acrylamide brushes via surface initiated atom transfer radical polymerization in an attempt to increase DNA surface density by building three-dimensional molecular architectures. ATR-FTIR as well as hybridization studies followed by SPR confirm the incorporation of the DNA sequences into the polymer backbone. MALDI-TOF analysis further suggests that six acrylamide monomer units are typically separating DNA branches present on a single brushes approximately 26 units long. This new approach offers a promising alternative to SAM-based nucleic acid and aptamer sensors and could enable the realization of more complex soft materials of controlled architecture capable of both recognition and signaling by including additional optically or electrochemically active moieties.
- Published
- 2011
7. Design and testing of a packaged microfluidic cell for the multiplexed electrochemical detection of cancer markers
- Author
-
Valerio Beni, Ciara K. O'Sullivan, Olivier Y.F. Henry, Ioanis Katakis, Frithoj Von Germar, Klaus Stefan Drese, Noemi Laboria, Daniel Latta, Josep Lluis Acero Sánchez, and Alex Fragoso
- Subjects
Rapid prototyping ,Time Factors ,Materials science ,Fabrication ,Microfluidics ,Clinical Biochemistry ,Breast Neoplasms ,Nanotechnology ,Biosensing Techniques ,02 engineering and technology ,Electrochemical detection ,Sensitivity and Specificity ,01 natural sciences ,Biochemistry ,Multiplexing ,Analytical Chemistry ,Microsystem ,Biomarkers, Tumor ,Electrochemistry ,Humans ,Electrochemical biosensor ,010401 analytical chemistry ,Reproducibility of Results ,DNA ,Equipment Design ,Prostate-Specific Antigen ,021001 nanoscience & nanotechnology ,Carcinoembryonic Antigen ,0104 chemical sciences ,Electrochemical gas sensor ,Female ,0210 nano-technology - Abstract
We present the rapid prototyping of electrochemical sensor arrays integrated to microfluidics towards the fabrication of integrated microsystems prototypes for point-of-care diagnostics. Rapid prototyping of microfluidics was realised by high-precision milling of polycarbonate sheets, which offers flexibility and rapid turnover of the desired designs. On the other hand, the electrochemical sensor arrays were fabricated using standard photolithographic and metal (gold and silver) deposition technology in order to realise three-electrode cells comprising gold counter and working electrodes as well as silver reference electrode. The integration of fluidic chips and electrode arrays was realised via a laser-machined double-sided adhesive gasket that allowed creating the microchannels necessary for sample and reagent delivery. We focused our attention on the reproducibility of the electrode array preparation for the multiplexed detection of tumour markers such as carcinoembryonic antigen and prostate-specific antigen as well as genetic breast cancer markers such as estrogen receptor-alpha, plasminogen activator urokinase receptor, epidermal growth factor receptor and erythroblastic leukemia viral oncogene homolog 2. We showed that by carefully controlling the electrode surface pre-treatment and derivatisation via thiolated antibodies or short DNA probes that the detection of several key health parameters on a single chip was achievable with excellent reproducibility and high sensitivity.
- Published
- 2009
8. Label free optical sensor for Avidin based on single gold nanoparticles functionalized with aptamers
- Author
-
V. Cengiz Ozalp, Alessandro Pinto, Frank J. Hernandez, Ciara K. O'Sullivan, Thomas A. Klar, Ioannis Katakis, and Srujan Kumar Dondapati
- Subjects
Materials science ,Optical Phenomena ,Aptamer ,Metal Nanoparticles ,General Physics and Astronomy ,Nanoparticle ,Nanotechnology ,Biosensing Techniques ,engineering.material ,Sensitivity and Specificity ,General Biochemistry, Genetics and Molecular Biology ,General Materials Science ,Label free ,Staining and Labeling ,biology ,Spectrum Analysis ,General Engineering ,General Chemistry ,Aptamers, Nucleotide ,Avidin ,Colloidal gold ,engineering ,biology.protein ,Noble metal ,Gold ,Biosensor - Abstract
Optical spectroscopy of a single gold nanoparticle, functionalized with an aptamer, is used to sense the specific binding of avidin. Herewith, the field of single noble metal nanoparticle biosensors is extended to the important field of aptamer based assays. The sensitivity of this initial, but not yet optimized apta-nano-sensor is in the range of 20 nM. Due to its nanoscopic size, this single nanoparticle based apta-sensor may be used in nanoscopic volumes such as in array type assays or even inside cells.
- Published
- 2009
9. Electronic ‘Off-On’ Molecular Switch for Rapid Detection of Thrombin
- Author
-
Josep Lluis Acero Sánchez, Eva Baldrich, Abd-Elgawad Radi, Pablo Lozano Sánchez, Ioanis Katakis, Srujan Kumar Dondapati, and Ciara K. O'Sullivan
- Subjects
Detection limit ,Molecular switch ,Chemistry ,Aptamer ,Analytical chemistry ,Chronoamperometry ,Combinatorial chemistry ,Analytical Chemistry ,Thrombin ,Molecular beacon ,Electrochemistry ,medicine ,Cyclic voltammetry ,Voltammetry ,medicine.drug - Abstract
An electrochemical molecular beacon aptasensor for fast and sensitive assay of thrombin is developed and characterized. A bifunctional derivative of the thrombin-binding aptamer, 15-base long with a redox-active ferrocene moiety and a pendant hexanethiol linker group at the termini of the aptamer strand was immobilized on Au electrode surface. The electrochemical behavior of the aptasensor was studied using cyclic voltammetry (CV), chronoamperometry (CA), chronopotentiometry (CP), square-wave voltammetry (SWV) and chronopotentiometric stripping analysis (PSA) techniques. Taken together, these experiments support the switch “on” mechanism of the system when the thrombin binds to the immobilized aptamer. The variation of response to the concentration of thrombin, the target protein, was evaluated by square-wave voltammetry and chronopotentiometric stripping analysis in HEPESbuffer solution (pH 8.0, 0.01 M). The aptasensor showed a specific response to thrombin in the range 1.0 to 35 nM with a detection limit of subnanomolar level concentrations. The reaction time, reproducibility, specificity and stability of the aptasensor were also studied.
- Published
- 2006
10. Site-Directed Immobilization of Proteins Through Electrochemical Deprotection on Electroactive Self-Assembled Monolayers
- Author
-
Josep Lluis Acero Sánchez, Srujan Kumar Dondapati, Josep Maria Montornés, Pablo Lozano Sánchez, Ioanis Katakis, and Ciara K. O'Sullivan
- Subjects
biology ,Chemistry ,Self-assembled monolayer ,Electrochemistry ,Horseradish peroxidase ,Combinatorial chemistry ,Analytical Chemistry ,Covalent bond ,biology.protein ,Organic chemistry ,Moiety ,Glucose oxidase ,Selectivity ,Voltammetry - Abstract
Self-assembled monolayers (SAM) were obtained on gold electrodes using thioctic esters of benzo[1,3]dioxinol.These SAMs present a group that can be electroactivated selectively and was used for the directed, reagentless, covalent patterning of proteins.The advantage of this moiety is that it allows electroactivation at low potentials increasing selectivity and reliability.In this study, the efficiency of this patterning system is examined.Cyclic voltammetry (CV) was used to confirm the electroactive nature of SAM modified electrodes, showing fast and complete electrochemical deprotection with one scan.The enzymes glucose oxidase (GOx) and horseradish peroxidase (HRP) were patterned
- Published
- 2006
11. Nondestructive Monitoring of Oxygen Profiles in Packaged Foods Using Phase-Fluorimetric Oxygen Sensor
- Author
-
Dmitri B. Papkovsky, D.J. Buckley, George G. Guilbault, Ciara K. O'Sullivan, Joseph P. Kerry, M. Fitzgerald, and Mary Smiddy
- Subjects
Smoked fish ,Chromatography ,Chemistry ,Phase (matter) ,chemistry.chemical_element ,Mineralogy ,sense organs ,Food research ,Cooked meat ,Oxygen sensor ,Oxygen ,Food Science - Abstract
Nondestructive quantitation of oxygen in different types of packaged foods was performed using dispos- able phosphorescent oxygen sensor inserts placed in every individual sample and a fiber-optic phosphorescent phase detector. Oxygen levels and their changes over storage time are presented for vacuum-packed raw and cooked meat, smoked fish, and MAP sliced ham and bread. Damage to vacuum-packages was simulated by slitting the package film and monitoring the sensor response at different locations from the site of damage. The performance of the optical oxygen sensor in packaged foods was evaluated, and its usefulness for food research and industrial applications discussed.
- Published
- 2001
12. Manly Meals and Mom's Home Cooking: Cookbooks and Gender in Modern America
- Author
-
Robin K. O'Sullivan
- Subjects
History ,Literature and Literary Theory ,Arts and Humanities (miscellaneous) ,Gender studies ,Advertising - Published
- 2004
13. OC29: Cost-effectiveness of magnetic resonance image-guided focused ultrasound (MRgFUS) for the treatment of uterine fibroids
- Author
-
David M. Thompson, Milton C. Weinstein, Paula Chu, Elizabeth A. Stewart, David W. Lee, and Amy K. O’Sullivan
- Subjects
medicine.medical_specialty ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,Cost effectiveness ,business.industry ,Uterine fibroids ,Obstetrics and Gynecology ,Rectum ,Magnetic resonance imaging ,General Medicine ,medicine.disease ,Deep infiltrating endometriosis ,Focused ultrasound ,medicine.anatomical_structure ,Reproductive Medicine ,medicine ,Radiology, Nuclear Medicine and imaging ,Levonorgestrel ,Radiology ,Pouch ,business ,medicine.drug - Abstract
Objectives: Medical therapies that suppress ovarian function are effective and alternative methods in pain-related relief of deep infiltrating endometriosis (DIE). The aim of this study was to assess whether the sonographically detectable posterior pelvic deep endometriotic nodules changed in dimension and echostructure during different medical therapies. Methods: Twenty-two symptomatic premenopausal patients with a posterior pelvic DIE nodule underwent sonographic evaluation before and after at least 6 months of medical therapy. Treatments used to suppress ovarian function were GnRH agonists in six patients, add back therapy in nine patients, continuous contraceptive steroids in five and insertion of a levonorgestrel intrauterine system in two patients. The DIE nodules were measured and the echostructure and tissue infiltration at different sites and organs were accurately described. A comparison of dimensions and sonographic characteristics of the endometriotic nodules before and during medical therapy was performed. Results: Nine patients had the largest nodule at the level of the uterosacral ligaments, six at the level of the pouch of Douglas, five at the level of the rectum sigmoid junction and two in the rectovaginal septum. Symptoms were completely relieved in 16 patients during therapy and significantly alleviated in the others. We observed a decrease in maximum diameter (28.1 ± 6.8 mm vs. 24.2 ± 7.9 mm) and in total volume (3.4 ± 2.4 mL vs. 2.3 ± 1.5 mL) of the endometriotic nodule during medical therapy; these changes were not statistically significant. None of the nodules disappeared during therapy; echostructure and infiltration of the surrounding tissue remained unchanged. Conclusions: Our sonographic findings confirmed that medical therapies do not cure DIE but only relieve pain and induce temporary quiescence of active lesions. This suggests the need for new prolonged medical treatments or surgical removal of DIE lesions.
- Published
- 2007
14. Credibility, readability and content analysis of treatment recommendations for adolescents with nonspecific back pain published on consumer websites.
- Author
-
Hauber SD, Robinson K, Fechner R, Pate JW, and O'Sullivan K
- Subjects
- Humans, Adolescent, Cross-Sectional Studies, Consumer Health Information standards, Female, Male, Health Literacy standards, Internet, Back Pain therapy, Comprehension
- Abstract
Background: Parents may seek out health information online when their adolescent has nonspecific back pain to better understand treatment options. Such information directed towards consumers has not been previously analysed., Methods: A descriptive cross-sectional content analysis was performed to describe the treatments recommended on consumer websites for nonspecific back pain in adolescents. The credibility and readability of the websites were also assessed. Systematic Google searches were completed in five countries, and relevant content from eligible web pages was analysed. An a priori codebook with 34 treatment-related codes was developed. Nine additional codes were inductively created during analysis. Credibility was assessed using the JAMA benchmark. Readability was assessed via the Flesch Kincaid Grade Level., Results: Of 245 web pages, 48 were deemed eligible and analysed. Of 43 treatment codes, 37 were present in at least one web page. The five most frequently identified codes were See the doctor/get a diagnosis (found on 85% of web pages), Ergonomics/posture/biomechanics (52%), Reassurance (48%), Physiotherapy (48%) and Non-prescription pharmaceuticals/supplements (46%). Only 21% of the web pages met all four JAMA benchmark criteria, and 15% cited at least one recent or high-quality source. The median Flesch Kincaid Grade Level score was 9.0 (range 3.5-12.9)., Conclusions: Parents of adolescents with nonspecific back pain may find that treatment recommendations published online are numerous and varied, with visits to the doctor encouraged. The credibility scores of these web pages are generally low, while the median reading level may be too high for the general population., Significance Statement: This analysis reveals that public-facing websites with recommendations for treating adolescent nonspecific back pain do not cite the most recent, high-quality research. Although web pages correctly encourage physical activity and exercise over surgery and prescription medications, they do not reflect the psychologically informed or interdisciplinary care emphasized in recently published treatment recommendations. Clinicians must be aware that caregivers of their adolescent patients with nonspecific back pain may be exposed to online messages that encourage them to keep seeking a diagnosis., (© 2024 The Authors. European Journal of Pain published by John Wiley & Sons Ltd on behalf of European Pain Federation ‐ EFIC ®.)
- Published
- 2024
- Full Text
- View/download PDF
15. Describing the nonsurgical, nonpharmacological interventions offered to adolescents with persistent back pain in randomized trials: A scoping review.
- Author
-
Hauber SD, Robinson K, Kirby E, Kamper S, Lennox NN, and O'Sullivan K
- Subjects
- Adolescent, Humans, Life Style, Outcome Assessment, Health Care, Randomized Controlled Trials as Topic, Back Pain psychology, Chronic Pain therapy
- Abstract
Background and Objectives: Persistent nonspecific back pain is now established as a biopsychosocial phenomenon that can be meaningfully affected by individuals' cognitions, emotions, lifestyle factors and family and social relationships. Recent guidelines for the treatment of adolescents with persistent nonspecific back pain, as well as those for youth with mixed chronic pain, strongly recommend interdisciplinary care in which adolescents receive treatment for both mind and body. The objective of this scoping review was to examine the interventions evaluated in randomized trials for adolescents with persistent back pain to determine whether they correspond to these guidelines and to reveal future research priorities., Databases and Data Treatment: The review protocol was registered in March 2022. We followed the PRISMA guidelines for scoping reviews. Twelve electronic databases were searched for relevant study reports. Data were charted on study characteristics, participant characteristics and intervention details using the Template for Intervention Description and Replication (TIDieR) checklist., Results: The search yielded 1952 records, of which eight reports representing seven randomized trials were eligible. The most common interventions were exercise therapy (n = 6) and back education (n = 4). Five studies employed multiple intervention components, but none was multidisciplinary. Studies primarily targeted posture or biomechanical factors. One study included an intervention addressing participants' fears and beliefs about pain., Conclusions: Randomized trials for adolescents with persistent back pain have primarily relied upon an outdated, biomechanical explanation of persisting pain. Future randomized trials should align with current treatment recommendations and measure outcomes across multiple biopsychosocial domains., Significance: This scoping review describes in detail the interventions included in randomized trials for adolescents with persistent, nonspecific back pain. The review is important because it reveals discrepancies between those interventions and the interventions recommended for this population., (© 2022 The Authors. European Journal of Pain published by John Wiley & Sons Ltd on behalf of European Pain Federation - EFIC ®.)
- Published
- 2023
- Full Text
- View/download PDF
16. The moderating role of sleep duration on momentary relations between negative affect and loss-of-control eating in children and adolescents.
- Author
-
Manasse SM, Haedt-Matt AA, Smith KE, Egbert AH, O'Sullivan K, Koren D, Engel S, and Goldschmidt AB
- Subjects
- Adolescent, Affect physiology, Child, Humans, Hyperphagia psychology, Obesity psychology, Sleep, Feeding Behavior psychology, Overweight psychology
- Abstract
Objective: Loss-of-control (LOC) eating is associated with eating disorders and obesity, and thus it is imperative to understand its momentary risk factors in order to improve intervention efforts. Negative affect has been proposed as a momentary risk factor for LOC eating, but the evidence for its effects in children and adolescents is mixed. Short sleep duration (which is very common in youth), may be one variable that moderates the relation between negative affect and subsequent LOC eating. As such, we aimed to examine the moderating role of within-person sleep duration on the momentary relations between negative affect and subsequent LOC eating., Method: We recruited children (N = 30) with overweight/obesity ages 8-14, who completed a 2-week ecological momentary assessment protocol assessing negative affect and LOC eating several times per day, while also wearing a sleep actigraphy device and completing sleep diaries., Results: Consistent with hypotheses, within-person sleep duration moderated the next-day momentary relation between within-person negative affect and LOC eating, such that shorter sleep duration strengthened the positive relation between negative affect and loss-of-control eating., Conclusions: Results suggest that, in children and adolescents, fluctuations in sleep duration may influence susceptibility to losing control over eating after experiencing negative affect. Future research should further investigate other metrics of sleep disturbance as they relate to emotion regulation and LOC eating. Such research will set the stage for augmenting paediatric interventions to better target maintenance factors for LOC eating., (© 2022 Eating Disorders Association and John Wiley & Sons Ltd.)
- Published
- 2022
- Full Text
- View/download PDF
17. Lower levels of physical activity are associated with pain progression in older adults, a longitudinal study.
- Author
-
O'Neill A, O'Sullivan K, and McCreesh K
- Subjects
- Aged, Aging, Humans, Longitudinal Studies, Pain Measurement, Exercise, Pain epidemiology
- Abstract
Background: While pain is common in older adults, the association with physical activity remains unclear. Currently, the role physical activity plays in impacting pain developing over time is not well defined., Methods: Latent transition analysis (LTA) is a model-based approach to identifying underlying subgroups in a population, longitudinally, based on measured characteristics. In this study, LTA was used to explore the associations between physical activity levels and pain classes of adults aged over 50 years, from the Irish Longitudinal Study on Ageing (n = 8,175) across three waves of data collection (4 years)., Results: Using three previously established pain classes (No Pain; Low-Moderate Impact Pain; High Impact Pain), 66% of older adults were classified as having 'No Pain' across the three waves. At Wave 1, individuals reporting low (OR = 4.00, 95% CI [3.21, 5.17]) or moderate (OR = 1.59, 95% CI [1.27, 1.99]) levels of physical activity are more likely to be in the High Impact Pain class, than the No Pain class. Longitudinally, individuals in the No Pain class with low or moderate physical activity were more likely to transition to the High Impact Pain class compared to those with higher physical activity scores (from Wave 1 to Wave 2, OR = 1.90, 95% CI [1.15, 3.37]; and from Wave 2 to Wave 3, OR = 2.27, 95% CI [1.40, 4.74])., Conclusion: Older adults who do not meet minimum physical activity guidelines for moderate intensity exercise are at increased risk of higher impact pain when followed over 4 years., Significance: Older adults who do not meet minimum physical activity guidelines are at increased risk of transitioning to higher impact pain classes when followed over 4 years., (© 2021 European Pain Federation - EFIC®.)
- Published
- 2021
- Full Text
- View/download PDF
18. Medication and healthcare utilization variation among older adults with pain.
- Author
-
O'Neill A, Purtill H, Kelly D, McCreesh K, Robinson K, and O'Sullivan K
- Subjects
- Aged, Humans, Longitudinal Studies, Middle Aged, Patient Acceptance of Health Care, Risk, Aging, Pain drug therapy, Pain epidemiology
- Abstract
Background: While pain is very common in older adults, the associated impact on daily life, including usage of medication and healthcare, varies considerably and often pain remains inadequately treated. It is not clear what is associated with this variation., Methods: Latent class analysis (LCA) is a model-based approach to identifying underlying subgroups in a population. In this study LCA was used to examine biopsychosocial risk classes of adults aged 50 years and older, who were often troubled by pain, from The Irish Longitudinal Study on Ageing (TILDA), (n = 2,896), and the associations with future medication and healthcare use., Results: Four biopsychosocial risk classes (Low Biopsychosocial Risk, Physical Health Risk, Mental Health Risk, High Biopsychosocial Risk) were identified, with the 'High Biopsychosocial Risk' class accounting for 24% of older adults with pain. This class were much more likely to use medication and healthcare services when followed up across three waves of the TILDA study. In contrast, the Physical Health Risk and the Mental Health Risk classes reported lower usage of medication and healthcare at waves 2 and 3. Amongst the higher risk classes of older adults who are troubled by pain, there is considerable consumption of medication and healthcare services evident., Conclusion: Given our ageing population and significant number of adults in this high risk class, there is a need to optimize current pain management approaches among older adults. Intensive non-pharmacological approaches to pain management in older adults, tailored to individual biopsychosocial risk indicators for each individual class, may be worth exploring., Significance: While pain is very common in older adults, the usage of medication and healthcare varies considerably and often pain remains inadequately treated. Given our ageing population and the significant number of older adults reporting high biopsychosocial risk (24%), there is a need to optimize current pain management approaches. Intensive non-pharmacological approaches to pain management in older adults, tailored to individual biopsychosocial risk indicators for each individual class, may be worth exploring., (© 2020 European Pain Federation - EFIC®.)
- Published
- 2021
- Full Text
- View/download PDF
19. Examining what factors mediate treatment effect in chronic low back pain: A mediation analysis of a Cognitive Functional Therapy clinical trial.
- Author
-
O'Neill A, O'Sullivan K, O'Sullivan P, Purtill H, and O'Keeffe M
- Subjects
- Cognition, Disability Evaluation, Humans, Mediation Analysis, Physical Therapy Modalities, Chronic Pain therapy, Cognitive Behavioral Therapy, Low Back Pain therapy
- Abstract
Background: Cognitive Functional Therapy (CFT) is a physiotherapist-led individualized intervention for people with people with non-specific chronic low back pain (CLBP), involving biopsychosocial pain education, graded movement exposure and lifestyle coaching., Methods: A multicentre randomized controlled trial (RCT), including 206 participants with CLBP in Ireland, supported CFT's effectiveness for reducing disability, but not pain, compared to a group exercise and education intervention. In this study, causal mediation analysis was used to determine whether the effect of CFT on disability and the lack of effect on pain (relative to a group exercise and education intervention) is mediated by certain psychological and lifestyle factors. Hypothesized mediators measured were pain self-efficacy, stress, fear of physical activity, coping, depression, anxiety and sleep, at 6 months. The outcomes measured were functional disability and pain intensity at 12 months., Results: This causal mediation study shows that the majority of benefit of CFT (relative to a group exercise and education intervention) for disability is due to increasing pain self-efficacy., Conclusion: Conclusion: CFT did not improve the majority of the hypothesized mediators (stress, fear of physical activity, coping, depression, anxiety and sleep) and these mediators were not associated with either disability or pain. Unfortunately, the proportion of missing data in this study is substantial and these findings can only be considered hypothesis-generating. Therefore, future research should examine replicating the results of this study to verify the role of self-efficacy and other proposed mediators (e.g. stress, coping, sleep, fear) on clinical outcomes., Significance: An exploration of seven potential mediators was undertaken to determine the effect of Cognitive Functional Therapy (CFT) on disability and pain intensity in individuals with chronic low back pain compared to a group exercise and education intervention. CFT improved pain self-efficacy, which was associated with disability and pain outcomes. CFT did not improve the other six potential mediators (stress, fear of physical activity, coping, depression, anxiety and sleep) and these were not associated with disability or pain. The proportion of missing data in this study is substantial and these findings should be considered hypothesis-generating only., (© 2020 European Pain Federation - EFIC®.)
- Published
- 2020
- Full Text
- View/download PDF
20. The change of pain classes over time: a latent transition analysis.
- Author
-
O'Neill A, O'Sullivan K, O'Keeffe M, Walsh C, and Purtill H
- Subjects
- Aged, Aging, Humans, Life Style, Longitudinal Studies, Middle Aged, Pain epidemiology, Quality of Life
- Abstract
Background: Pain is common in older adults, and associated with increased morbidity and reduced quality of life. Recent research has highlighted different classes of older adults with pain, each with differing impacts on their life. It has not yet been investigated if, and how, such classes change over time and what influences individuals to prospectively transition to a profile of either improved or worsened pain impact., Methods: Latent transition analysis (LTA) is a longitudinal model-based approach to identifying underlying subgroups in a population. LTA was used to model the change in pain of people aged 50 and above, from The Irish Longitudinal Study on Ageing, across three waves (n = 5,925). The LTA model was extended to include biopsychosocial covariates to predict transition probabilities between classes over time., Results: Three latent classes were identified based on three pain indicators (pain presence; pain affects daily life; pain requires medication) and were characterized as "No Pain", "Low-Moderate Impact Pain" and "High Impact Pain". Results indicate that the pain class of many changes over time. However, poor physical or mental health increased the risk of transitioning to a more severe pain class, from Wave 1 to Wave 2 and Wave 2 to Wave 3., Conclusions: These findings show the change in pain of older adults over time, with both marked improvement and deterioration being observed. Critically, the predictors of individuals transitioning between classes reflect the breadth of biopsychosocial factors involved in pain., Significant Statement: This article identified differing classes of pain in older adults, using latent transition analysis. The analysis demonstrated how the pain classes of older adults are broadly consistent over time, however both improvement and deterioration in pain impact were observed. Transitions between classes were associated with several biopsychosocial factors. These results have important implications for the health and quality of life of older adults. Consideration of health, lifestyle and socio-demographic factors may enhance assessment and management of pain in older adults., (© 2019 European Pain Federation - EFIC®.)
- Published
- 2020
- Full Text
- View/download PDF
21. Baseline results of the first healthy schools evaluation among a community of young, Irish, urban disadvantaged children and a comparison of outcomes with international norms.
- Author
-
Comiskey CM, O'Sullivan K, Quirke MB, Wynne C, Hollywood E, and MGillloway S
- Subjects
- Age Factors, Chi-Square Distribution, Child, Child, Preschool, Community Health Services, Emotions, Feasibility Studies, Female, Humans, Internationality, Ireland, Male, Mental Health, Psychometrics, Surveys and Questionnaires, Time Factors, Child Welfare, Health Status Disparities, Poverty statistics & numerical data, School Health Services statistics & numerical data, Schools, Treatment Outcome, Urban Population
- Abstract
Background: In 2008, the Irish Government initiated a pilot Healthy Schools Programme based on the World Health Organization Health Promoting Schools Model among children attending schools officially designated as urban and disadvantaged. We present here the first results on physical and emotional health and the relationship between childhood depression and demographic and socioeconomic factors., Methods: The Healthy Schools Programme evaluation was a 3-year longitudinal outcome study among urban disadvantaged children aged 4 to 12 years. Physical and psychological health outcomes were measured using validated, international instruments at baseline. Outcomes at baseline were compared with international norms and where differences were found, results were statistically modeled to determine factors predicting poor outcomes., Results: A total of 552 children responded at baseline, representing over 50% of all eligible children available to participate from 7 schools. Findings at baseline revealed that in general, children did not differ significantly from international norms. However, detailed analysis of the childhood depression scores revealed that in order of importance, psychological well-being, the school environment, social support, and peer relations and age were statistically significant predictors of increased childhood depression in children under 12 years of age., Conclusion: Future health and well-being studies in schools among urban disadvantaged children need to broaden their scope to include measures of depression in children under 12 years of age and be cognisant of the impact of the school environment on the mental and emotional health of the very young., (© 2012, American School Health Association.)
- Published
- 2012
- Full Text
- View/download PDF
22. Classification of array CGH data using smoothed logistic regression model.
- Author
-
Huang J, Salim A, Lei K, O'Sullivan K, and Pawitan Y
- Subjects
- Algorithms, Apoptosis Regulatory Proteins, Artificial Intelligence, BRCA1 Protein genetics, BRCA2 Protein genetics, Breast Neoplasms genetics, Carcinoma, Squamous Cell genetics, Chromosomes, Human genetics, Comparative Genomic Hybridization classification, Computer Simulation, DNA Copy Number Variations genetics, Discriminant Analysis, Female, Humans, Least-Squares Analysis, Likelihood Functions, Monte Carlo Method, Mouth Neoplasms genetics, Oligonucleotide Array Sequence Analysis, Tumor Suppressor Protein p53 genetics, Comparative Genomic Hybridization methods, Logistic Models, Models, Statistical
- Abstract
Array comparative genomic hybridization (aCGH) provides a genome-wide information of DNA copy number that is potentially useful for disease classification. One immediate problem is that the data contain many features (probes) but only a few samples. Existing approaches to overcome this problem include features selection, ridge regression and partial least squares. However, these methods typically ignore the spatial characteristic of aCGH data. To explicitly make use of this spatial information we develop a procedure called smoothed logistic regression (SLR) model. The procedure is based on a mixed logistic regression model, where the random component is a mixture distribution that controls smoothness and sparseness. Conceptually such a procedure is straightforward, but its implementation is complicated due to computational problems. We develop a fast and reliable iterative weighted least-squares algorithm based on the singular value decomposition. Simulated data and two real data sets are used to illustrate the procedure. For real data sets, error rates are calculated using the leave-one-out cross validation procedure. For both simulated and real data examples, SLR achieves better misclassification error rates compared with previous methods.
- Published
- 2009
- Full Text
- View/download PDF
23. Characteristics of 234 dog bite incidents in Ireland during 2004 and 2005.
- Author
-
O'Sullivan EN, Jones BR, O'Sullivan K, and Hanlon AJ
- Subjects
- Adult, Animals, Bites and Stings psychology, Euthanasia, Animal statistics & numerical data, Female, Humans, Interviews as Topic, Ireland epidemiology, Male, Middle Aged, Risk Factors, Young Adult, Behavior, Animal, Bites and Stings epidemiology, Dogs
- Abstract
Information was obtained by telephone interview from 100 dog owners whose dog had bitten a person, and from 134 victims of bites by a dog not owned by the victim. Three-quarters of the victims were female and aged from 21 to 60 years. The majority of the dogs were owned, male, two to six years old, over 10 kg in bodyweight and belonged to the popular breeds: collies, cocker/springer spaniels, terrier breeds, Jack Russell terriers, German shepherd dogs, golden retrievers and crossbreeds. The numbers of bites by the different breeds indicated that those that inflicted the most bites were the popular breeds rather than the breeds with any greater propensity to bite. Most attacks were rapid single bites and in 50 per cent of the cases, neither the owner nor the victim was able to identify any signal of the dog's intention to bite. Overall, 21 per cent of the incidents were rated as 'serious' and 2 per cent as 'life threatening'. One fifth of the dogs were euthanased as a result of the incident. Half the incidents required professional medical assistance for the victim. Almost half the incidents took place while the victim was walking or passing close to the dog's territory, or while the victim was interacting with the dog at home.
- Published
- 2008
- Full Text
- View/download PDF
24. The organisation of a farmers' "do-it-yourself" bovine insemination service.
- Author
-
O'Sullivan K
- Subjects
- Animals, Breeding, Cattle, Cattle Diseases epidemiology, Disease Outbreaks veterinary, Female, Foot-and-Mouth Disease epidemiology, Legislation, Veterinary, Male, Semen, United Kingdom, Dairying, Insemination, Artificial veterinary
- Published
- 1971
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.