39 results on '"Ramsay, H"'
Search Results
2. Using historical tropical cyclone climate datasets to examine wind speed recurrence for coastal Australia
- Author
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Bell, S. S., Dowdy, A. J., Ramsay, H. A., Chand, S. S., Su, C-H, and Ye, H.
- Published
- 2022
- Full Text
- View/download PDF
3. Prioritisation of clinical trial learning needs of musculoskeletal researchers: an inter-disciplinary modified Delphi study by the Australia & New Zealand musculoskeletal clinical trials network.
- Author
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Filbay, SR, Ferreira, GE, Metcalf, B, Buchbinder, R, Ramsay, H, Abbott, JH, Darlow, B, Zadro, JR, Davidson, SRE, Searle, E, McKenzie, BJ, Hinman, RS, Filbay, SR, Ferreira, GE, Metcalf, B, Buchbinder, R, Ramsay, H, Abbott, JH, Darlow, B, Zadro, JR, Davidson, SRE, Searle, E, McKenzie, BJ, and Hinman, RS
- Abstract
BACKGROUND: There is a need to increase the capacity and capability of musculoskeletal researchers to design, conduct, and report high-quality clinical trials. The objective of this study was to identify and prioritise clinical trial learning needs of musculoskeletal researchers in Australia and Aotearoa New Zealand. Findings will be used to inform development of an e-learning musculoskeletal clinical trials course. METHODS: A two-round online modified Delphi study was conducted with an inter-disciplinary panel of musculoskeletal researchers from Australia and Aotearoa New Zealand, representing various career stages and roles, including clinician researchers and consumers with lived experience of musculoskeletal conditions. Round 1 involved panellists nominating 3-10 topics about musculoskeletal trial design and conduct that they believe would be important to include in an e-learning course about musculoskeletal clinical trials. Topics were synthesised and refined. Round 2 asked panellists to rate the importance of all topics (very important, important, not important), as well as select and rank their top 10 most important topics. A rank score was calculated whereby higher scores reflect higher rankings by panellists. RESULTS: Round 1 was completed by 121 panellists and generated 555 individual topics describing their musculoskeletal trial learning needs. These statements were grouped into 37 unique topics for Round 2, which was completed by 104 panellists. The topics ranked as most important were: (1) defining a meaningful research question (rank score 560, 74% of panellists rated topic as very important); (2) choosing the most appropriate trial design (rank score 410, 73% rated as very important); (3) involving consumers in trial design through to dissemination (rank score 302, 62% rated as very important); (4) bias in musculoskeletal trials and how to minimise it (rank score 299, 70% rated as very important); and (5) choosing the most appropriate control/comparat
- Published
- 2024
4. The Modulating Influence of Indian Ocean Sea Surface Temperatures on Australian Region Seasonal Tropical Cyclone Counts
- Author
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Ramsay, H. A., Richman, M. B., and Leslie, L. M.
- Published
- 2017
5. Potential for prediction of psychosis and bipolar disorder in Child and Adolescent Mental Health Services:a longitudinal register study of all people born in Finland in 1987
- Author
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Lång, U. (Ulla), Ramsay, H. (Hugh), Yates, K. (Kathryn), Veijola, J. (Juha), Gyllenberg, D. (David), Clarke, M. C. (Mary C.), Leacy, F. P. (Finbarr P.), Gissler, M. (Mika), Kelleher, I. (Ian), Lång, U. (Ulla), Ramsay, H. (Hugh), Yates, K. (Kathryn), Veijola, J. (Juha), Gyllenberg, D. (David), Clarke, M. C. (Mary C.), Leacy, F. P. (Finbarr P.), Gissler, M. (Mika), and Kelleher, I. (Ian)
- Abstract
Current strategies to predict psychosis identify only a small proportion of individuals at risk. Additional strategies are needed to increase capacity for prediction and prevention of serious mental illness, ideally during childhood and adolescence. One possible approach would be to investigate systems in which psychosis risk factors are concentrated during childhood. One notable such system is represented by Child and Adolescent Mental Health Services (CAMHS). Although psychotic disorders are uncommon in CAMHS, many risk factors for psychosis are highly prevalent in young people who enter this system. We hypothesized, therefore, that youth attending CAMHS would be a high-risk group for psychosis if followed into adulthood and, furthermore, that CAMHS systems would capture a substantial proportion of future psychosis cases. We constructed a total population cohort study of all Finns born in 1987 (N=55,875), linking together extensive register data on health care contacts from birth through age 28 years. We identified all individuals diagnosed with a psychotic or bipolar disorder by age 28 (N=1,785). The risk of psychosis/bipolar disorder by age 28 years was 1.8% for individuals who had not attended CAMHS during childhood or adolescence, whereas it was 12.8% for those with a history of any outpatient CAMHS contact (odds ratio, OR=7.9, 95% CI: 7.2‐8.7). Furthermore, the risk of psychosis/bipolar disorder by age 28 years was 2.3% for individuals without a history of inpatient CAMHS admission, whereas it was 24.0% for those with a history of inpatient CAMHS admission (OR=13.3, 95% CI: 11.9‐14.9), and 36.5% for those with a history of inpatient CAMHS admission in adolescence (age 13‐17 years) (OR=24.2, 95% CI: 21.2‐27.6). Individuals who attended CAMHS but received no mental disorder diagnosis had an equally high risk of subsequently developing a psychosis/bipolar disorder as individuals who did receive a diagnosis (OR=0.9, 99.5% CI: 0.7‐1.1). Compared to other
- Published
- 2022
6. Psychotic experiences and suicide attempt risk in common mental disorders and borderline personality disorder
- Author
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Kelleher, I., Ramsay, H., and DeVylder, J.
- Published
- 2017
- Full Text
- View/download PDF
7. Using historical tropical cyclone climate datasets to examine wind speed recurrence for coastal Australia
- Author
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Bell, S. S., primary, Dowdy, A. J., additional, Ramsay, H. A., additional, Chand, S. S., additional, Su, C-H, additional, and Ye, H., additional
- Published
- 2022
- Full Text
- View/download PDF
8. The ancillaries.
- Author
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Slugg, Ramsay H.
- Subjects
Estate planning -- Methods ,Company business planning - Abstract
Art is an asset of passion. Coupled with its unique financial characteristics, this makes art perhaps the most difficult asset to incorporate into an overall estate and financial plan. This [...]
- Published
- 2016
9. Associations between maternal prenatal C-reactive protein and risk factors for psychosis in adolescent offspring:findings from the Northern Finland Birth Cohort 1986
- Author
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Ramsay, H. (Hugh), Surcel, H.-M. (Heljä-Marja), Björnholm, L. (Lassi), Kerkelä, M. (Martta), Khandaker, G. M. (Golam M.), Veijola, J. (Juha), Ramsay, H. (Hugh), Surcel, H.-M. (Heljä-Marja), Björnholm, L. (Lassi), Kerkelä, M. (Martta), Khandaker, G. M. (Golam M.), and Veijola, J. (Juha)
- Abstract
Prenatal infection is associated with brain structural and functional abnormalities and may increase the risk for psychosis through a direct effect on neurodevelopment. Various infections may exert their effect through a proinflammatory immune response but studies of prenatal maternal inflammatory markers and offspring neurodevelopment are scarce. Using the longitudinal Northern Finland Birth Cohort 1986 study, we examined the associations of maternal prenatal C-reactive protein (CRP) levels with psychosis risk factors in adolescent offspring. CRP was measured in maternal sera collected in pregnancy. In offspring, school performance was measured at age 7 years, while school performance, psychotic experiences, and cannabis use were measured at age 16 years. We tested associations of CRP with offspring measures using regression analysis controlling for offspring sex, maternal education level, and prenatal maternal body mass index, smoking and alcohol use in pregnancy, place of birth, maternal psychiatric admission, paternal psychiatric admission, mothers age at birth, and gestational week of CRP sample. We also tested if adolescent cannabis use mediated the associations between maternal CRP and offspring outcomes. Controlling for covariates, maternal CRP was associated with academic performance at age 16 years (beta = .062, 95% CI = 0.036–0.088), but not with possible psychotic experiences at 16 years (odds ratio [OR] = 1.09, 95% CI = 0.96–1.24). Maternal CRP was also associated with adolescent cannabis use (OR = 1.24, 95% CI = 1.07–1.43). These findings suggest that prenatal inflammation may influence later mental illness risk by affecting neurodevelopment and also indirectly by increasing the risk of exposure to cannabis.
- Published
- 2021
10. Handbook of Practical Planning for Artists, Art Collectors, and Their Advisors, Second Edition
- Author
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Ramsay H. Slugg and Ramsay H. Slugg
- Subjects
- Gifts--Law and legislation--United States, Estate planning--United States, Law and art--United States, Inheritance and succession--United States, Artists--Legal status, laws, etc.--United States
- Abstract
Art is an asset of passion, as author Ramsay H. Slugg states, yet it also has unique and important financial characteristics. This makes art possibly the most difficult asset to incorporate into an overall estate and financial plan. Handbook of Practical Planning for Artists, Art Collectors and Their Advisors addresses two essential elements of art ownership: planning for the ultimate disposition of the art, including how to address the wealth represented by the art into any estate and financial planning, and also the practical considerations for collectors as they actively collect and plan for the art's eventual disposition.After a brief discussion of the art market generally, the book introduces and explains a client-focused process I use when advising art collectors. This process includes explaining both the income, estate and gift tax consequences of various options, as well as the important and often emotional non-tax considerations of collecting and disposing of art. The book also discusses the role and importance of other advisors who are involved in these decisions, including art advisors, risk management professionals and appraisers. To better illustrate the material, the book features enlightening case studies.
- Published
- 2019
11. Cognition, psychosis risk and metabolic measures in two adolescent birth cohorts
- Author
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Ramsay, H. (Hugh), Barnett, J. H. (Jennifer H), Murray, G. K. (Graham K), Miettunen, J. (Jouko), Mäki, P. (Pirjo), Järvelin, M.-R. (Marjo-Riitta), Smith, G. D. (George Davey), Ala-Korpela, M. (Mika), and Veijola, J. (Juha)
- Subjects
cognition ,psychosis risk ,ALSPAC ,NFBC 1986 ,fatty acids ,lipoprotein lipids ,metabolomics - Abstract
Background: Psychoses, especially schizophrenia, are often preceded by cognitive deficits and psychosis risk states. Altered metabolic profiles have been found in schizophrenia. However, the associations between metabolic profiles and poorer cognitive performance and psychosis risk in the population remain to be determined. Methods: Detailed molecular profiles were measured for up to 8976 individuals from two general population-based prospective birth cohorts: the Northern Finland Birth Cohort 1986 (NFBC 1986) and the Avon Longitudinal Study of Parents and Children (ALSPAC). A high-throughput nuclear magnetic resonance spectroscopy platform was used to quantify 70 metabolic measures at age 15–16 years in the NFBC 1986 and at ages 15 and 17 years in ALSPAC. Psychosis risk was assessed using the PROD-screen questionnaire at age 15–16 years in the NFBC 1986 or the psychotic-like symptoms assessment at age 17 years in ALSPAC. Cognitive measures included academic performance at age 16 years in both cohorts and general intelligence and executive function in ALSPAC. Logistic regression measured cross-sectional and longitudinal associations between metabolic measures and psychosis risk and cognitive performance, controlling for important covariates. Results: Seven metabolic measures, primarily fatty acid (FA) measures, showed cross-sectional associations with general cognitive performance, four across both cohorts (low density lipoprotein diameter, monounsaturated FA ratio, omega-3 ratio and docosahexaenoic acid ratio), even after controlling for important mental and physical health covariates. Psychosis risk showed minimal metabolic associations. Conclusions: FA ratios may be important in marking risk for cognitive deficits in adolescence. Further research is needed to clarify whether these biomarkers could be causal and thereby possible targets for intervention.
- Published
- 2018
12. Practical planning for art collectors and their advisors.
- Author
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Slugg, Ramsay H.
- Subjects
Art collectors -- Planning ,Estate planning -- Methods ,Company business planning - Abstract
[ILLUSTRATION OMITTED] This is the second of a two-part article based on the author's book, Handbook of Practical Planning for Art Collectors and Their Advisors. Part 1, "The Ancillaries," Prob. [...]
- Published
- 2016
13. Predictors of psychosis risk and neurocognitive deficits
- Author
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Ramsay, H. (Hugh), Veijola, J. (Juha), Miettunen, J. (Jouko), and Barnett, J. (Jenny)
- Subjects
cognition ,kognitio ,BDNF ,psychosis risk ,metabolia ,DRD2 ,äidin raskaudenaikainen tupakointi ,metabolomics ,COMT ,prenatal exposure to maternal cigarette smoking ,psykoosiriski - Abstract
Psychotic disorders usually become evident during adolescence and early adulthood and are commonly preceded by psychosis risk states. Young people at risk for developing psychosis may already have cognitive deficits. This research examined factors associated with psychosis risk and adverse cognitive performance, particularly in those at risk for developing psychosis. We aimed to characterise genetic risk factors for psychosis risk and adverse cognitive performance. Additionally, early and later biological risk markers for adverse cognitive performance and psychosis risk were explored. Two longitudinal birth cohorts, the Northern Finland Birth Cohort 1986 (NFBC 1986, n=6,985 at 16 years) and Avon Longitudinal Study of Parents and Children (ALSPAC, n=5,217 at 17 years), two NFBC 1986 sub-studies, the Oulu Brain and Mind 1 (n=182 for these analyses) and Oulu Brain and Mind 2 (n=471 for these analyses) studies, and two Irish case control studies, the Adolescent Brain Development (n=212) and Challenging Times (n=211) studies, were utilised. Predictors of interest were selected Single Nucleotide Polymorphisms (SNPs at COMT, BDNF and DRD2), prenatal exposure to maternal cigarette smoking (PEMCS) and adolescent metabolic measures. Though not directly associated with psychotic experiences, the COMT-Val158Met Val-Val genotype interacted with experience of childhood trauma to predict more psychotic experiences. Two DRD2 SNPs were associated with poorer cognitive performance, though only in those with risk for psychotic disorders. PEMCS was associated with adult vocabulary and matrix reasoning performance in males, though not in males with adolescent psychotic experiences. Adolescent academic performance, but not psychotic experiences, were associated with metabolic measures, especially with ratios of omega-3 to total fatty acids. These findings impact on prevention strategies for long-term adverse outcomes. Some risk factors differ for those with psychotic experiences compared to the general population, while others do not. SNPs at COMT and DRD2 may be more relevant in those with psychotic experiences. Interventions targeting these groups may be particularly beneficial. Smoking in pregnancy, however, is harmful to male cognitive performance across the population, suggesting elimination of this risk is more broadly relevant. Fatty acid-related metabolic measures may mark risk for cognitive deficits or may represent a developmental feature that is potentially open to intervention. Tiivistelmä Psykoottiset häiriöt puhkeavat tavallisesti nuoruusiässä tai varhaisessa aikuisiässä. Varsinaista psykoosijaksoa edeltää usein psykoosialttiusvaihe. Nuoruusiän psykoosialttiusvaiheeseen liittyy kognitiivisia puutoksia. Tässä tutkimuksessa selvitettiin tekijöitä, jotka liittyvät psykoosialttiuteen ja heikkoon kognitiiviseen suoriutumiseen, etenkin nuorilla, jotka olivat psykoosiriskissä. Tutkimuksessa tarkasteltiin psykoosialttiuteen ja heikkoon kognitiiviseen suoriutumiseen liittyviä geneettisiä tekijöitä. Lisäksi tutkittiin biologisia varhaisia ja myöhempiä psykoosialttiutta ja heikkoa kognitiivista suoriutumista ennustavia tekijöitä. Tutkimusaineisto käsitti kaksi pitkittäistä syntymäkohorttia: Pohjois-Suomen syntymäkohortti 1986 (n=6,985 16-vuotiaana) ja englantilainen Avon Longitudinal Study of Parents and Children (ALSPAC, n=5,217 17-vuotiaana) -tutkimukset. Pohjois-Suomen syntymäkohortti 1986:sta analysoitiin kahta ala-otosta eli Aivot ja Mieli I (n=182) ja Aivot ja Mieli II (n=471) tutkimusta. Lisäksi tutkimusaineistoon kuului kaksi irlantilaista tapaus-verrokki tutkimusta: Adolescent Brain Development (n=212) ja Challenging Times (n=211) tutkimukset. Ennustavina tekijöinä tarkasteltiin yhden nukleotidin polymorfismia (Single Nucleotide Polymorphisms, SNP; COMT, BDNF ja DRD2 -geeneissä), äidin raskaudenaikaista tupakointia, lapsuuden traumaattisia kokemuksia ja nuoruusiän metabolisia arvoja. COMT-Val158Met geenin Val-Val genotyyppi ei ollut suoraan yhteydessä psykoottisiin kokemuksiin, mutta yhdessä lapsuuden traumaattisten kokemusten kanssa ennusti suurempaa psykoosioireiden määrää. Kaksi DRD2 SNP-varianttia assosioituivat heikompaan kognitiiviseen suoriutumiseen, vaikkakin vain tutkittavilla jotka olivat psykoosialttiita. Äidin raskaudenaikainen tupakointi ennusti huonompaa kognitiivista suoriutumista pojilla, tosin ei pojilla joilla oli nuoruusiässä psykoosioireita. Metaboliset tekijät, erityisesti omega-3 rasvahapon suhde kokonaisrasvahapon määrään oli yhteydessä koulumenestykseen. Tutkimuksen tulosten perusteella voidaan mahdollisesti suunnitella ennaltaehkäiseviä toimia myöhempien haittojen ehkäisemiseksi. Jotkut tutkituista riskitekijöistä assosioituivat eri tavalla kognitioon psykoosialttiilla kuin yleisväestössä. COMT ja DRD2 geenien variantit psykoosialttiilla saattavat olla keskeisiä. Interventiot nuorille, joilla on nämä variantit ja psykoosioireita, voisivat olla erityisesti hyödyllisiä. Äidin raskauden aikaisen tupakointi ennusti poikien kognitiivista suoriutumista. Äidin raskaudenaikaisen tupakoinnin vähentämisellä olisi suotuinen vaikutus tässäkin suhteessa. Rasvahappoihin liittyvät metaboliset suureet voivat olla riski kognitiivisille puutoksille tai ne voivat merkitä kehityksellistä piirrettä, joka voisi mahdollistaa varhaisen ennaltaehkäisyn.
- Published
- 2017
14. Photovoltaics as an Experimental Tool for Determining Frontier Orbital Energies and Photocatalytic Activity of Thiol Protected Gold Clusters
- Author
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Stamplecoskie, K. G., primary, Yousefalizadeh, G., additional, Gozdzialski, L., additional, and Ramsay, H., additional
- Published
- 2018
- Full Text
- View/download PDF
15. The power of fluorescence excitation–emission matrix (EEM) spectroscopy in the identification and characterization of complex mixtures of fluorescent silver clusters
- Author
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Ramsay, H., primary, Simon, D., additional, Steele, E., additional, Hebert, A., additional, Oleschuk, R. D., additional, and Stamplecoskie, K. G., additional
- Published
- 2018
- Full Text
- View/download PDF
16. Predictors of psychosis risk and neurocognitive deficits
- Author
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Veijola, J. (Juha), Miettunen, J. (Jouko), Barnett, J. (Jenny), Ramsay, H. (Hugh), Veijola, J. (Juha), Miettunen, J. (Jouko), Barnett, J. (Jenny), and Ramsay, H. (Hugh)
- Abstract
Psychotic disorders usually become evident during adolescence and early adulthood and are commonly preceded by psychosis risk states. Young people at risk for developing psychosis may already have cognitive deficits. This research examined factors associated with psychosis risk and adverse cognitive performance, particularly in those at risk for developing psychosis. We aimed to characterise genetic risk factors for psychosis risk and adverse cognitive performance. Additionally, early and later biological risk markers for adverse cognitive performance and psychosis risk were explored. Two longitudinal birth cohorts, the Northern Finland Birth Cohort 1986 (NFBC 1986, n=6,985 at 16 years) and Avon Longitudinal Study of Parents and Children (ALSPAC, n=5,217 at 17 years), two NFBC 1986 sub-studies, the Oulu Brain and Mind 1 (n=182 for these analyses) and Oulu Brain and Mind 2 (n=471 for these analyses) studies, and two Irish case control studies, the Adolescent Brain Development (n=212) and Challenging Times (n=211) studies, were utilised. Predictors of interest were selected Single Nucleotide Polymorphisms (SNPs at COMT, BDNF and DRD2), prenatal exposure to maternal cigarette smoking (PEMCS) and adolescent metabolic measures. Though not directly associated with psychotic experiences, the COMT-Val158Met Val-Val genotype interacted with experience of childhood trauma to predict more psychotic experiences. Two DRD2 SNPs were associated with poorer cognitive performance, though only in those with risk for psychotic disorders. PEMCS was associated with adult vocabulary and matrix reasoning performance in males, though not in males with adolescent psychotic experiences. Adolescent academic performance, but not psychotic experiences, were associated with metabolic measures, especially with ratios of omega-3 to total fatty acids. These findings impact on prevention strategies for long-term adverse outcomes. Some risk factors differ for those with psychotic experiences, Tiivistelmä Psykoottiset häiriöt puhkeavat tavallisesti nuoruusiässä tai varhaisessa aikuisiässä. Varsinaista psykoosijaksoa edeltää usein psykoosialttiusvaihe. Nuoruusiän psykoosialttiusvaiheeseen liittyy kognitiivisia puutoksia. Tässä tutkimuksessa selvitettiin tekijöitä, jotka liittyvät psykoosialttiuteen ja heikkoon kognitiiviseen suoriutumiseen, etenkin nuorilla, jotka olivat psykoosiriskissä. Tutkimuksessa tarkasteltiin psykoosialttiuteen ja heikkoon kognitiiviseen suoriutumiseen liittyviä geneettisiä tekijöitä. Lisäksi tutkittiin biologisia varhaisia ja myöhempiä psykoosialttiutta ja heikkoa kognitiivista suoriutumista ennustavia tekijöitä. Tutkimusaineisto käsitti kaksi pitkittäistä syntymäkohorttia: Pohjois-Suomen syntymäkohortti 1986 (n=6,985 16-vuotiaana) ja englantilainen Avon Longitudinal Study of Parents and Children (ALSPAC, n=5,217 17-vuotiaana) -tutkimukset. Pohjois-Suomen syntymäkohortti 1986:sta analysoitiin kahta ala-otosta eli Aivot ja Mieli I (n=182) ja Aivot ja Mieli II (n=471) tutkimusta. Lisäksi tutkimusaineistoon kuului kaksi irlantilaista tapaus-verrokki tutkimusta: Adolescent Brain Development (n=212) ja Challenging Times (n=211) tutkimukset. Ennustavina tekijöinä tarkasteltiin yhden nukleotidin polymorfismia (Single Nucleotide Polymorphisms, SNP; COMT, BDNF ja DRD2 -geeneissä), äidin raskaudenaikaista tupakointia, lapsuuden traumaattisia kokemuksia ja nuoruusiän metabolisia arvoja. COMT-Val158Met geenin Val-Val genotyyppi ei ollut suoraan yhteydessä psykoottisiin kokemuksiin, mutta yhdessä lapsuuden traumaattisten kokemusten kanssa ennusti suurempaa psykoosioireiden määrää. Kaksi DRD2 SNP-varianttia assosioituivat heikompaan kognitiiviseen suoriutumiseen, vaikkakin vain tutkittavilla jotka olivat psykoosialttiita. Äidin raskaudenaikainen tupakointi ennusti huonompaa kognitiivista suoriutumista pojilla, tosin ei pojilla joilla oli nuoruusiässä psykoosioireita. Metaboliset tekijät, erityisesti omega-3 rasvahapon suhde kokonaisrasvahapon mä
- Published
- 2017
17. The modulating influence of Indian Ocean sea surface temperatures on Australian region seasonal tropical cyclone counts
- Author
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Ramsay, H, Richman, MB, Leslie, LM, Ramsay, H, Richman, MB, and Leslie, LM
- Abstract
© 2017 American Meteorological Society. The Australian region seasonal tropical cyclone count (TCC) maintained a robust statistical relationship with El Niño-Southern Oscillation (ENSO), with skillful forecasts of above (below) average TCC during La Niña (El Niño) years from 1969 until about 1998, weakening thereafter. The current study identifies an additional climate driver that mitigates the loss of predictive skill for Australian TCC after about 1998. It is found that the seasonal Australian TCC is strongly modulated by a southwest-to-northeast-oriented dipole in Indian Ocean sea surface temperature anomalies (SSTAs), referred to here as the transverse Indian Ocean dipole (TIOD). The TIOD emerges as the leading mode of detrended Indian Ocean SSTAs in the Southern Hemisphere during late winter and spring. Active (inactive) TC seasons are linked to positive (negative) TIOD phases, most notably during August-October immediately preceding the TC season, when SSTAs northwest of Australia, in the northeast pole of the TIOD, are positive (negative). To provide a physical interpretation of the TIOD-TCC relationship, 850-hPa zonal winds, 850-hPa relative vorticity, and 600-hPa relative humidity are composited for positive and negative TIOD phases, providing results consistent with observed TCC modulation. Correlations between ENSO and TCC weaken from 1998 onward, becoming statistically insignificant, whereas the TIOD-TCC correlation remains statistically significant until 2003. Overall, TIOD outperforms Niño-4 SSTA as a TCC predictor (46% skill increase since about 1998), when used individually or with Niño-4. The combination of TIOD and Niño 4 provide a skill increase (up to 33%) over climatology, demonstrating reliably accurate seasonal predictions of Australian region TCC.
- Published
- 2017
18. Why is the tropical cyclone boundary layer not 'well-mixed'?
- Author
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Kepert, JD, Schwendike, J, and Ramsay, H
- Subjects
Physics::Atmospheric and Oceanic Physics - Abstract
Plausible diagnostics for the top of the tropical cyclone boundary layer include (i) the top of the layer of strong frictional inflow and (ii) the top of the “well-mixed” layer; that is, the layer over which potential temperature θ is approximately constant. Observations show that these two candidate definitions give markedly different results in practice, with the inflow layer being roughly twice the depth of the layer of nearly constant θ. Here, we will present an analysis of the thermodynamics of the tropical cyclone boundary layer derived from an axisymmetric model. We show that the marked dry static stability in the upper part of the inflow layer is due largely to diabatic effects. The radial wind varies strongly with height, and therefore so does radial advection of θ. This process also stabilizes the boundary layer, but to a lesser degree than diabatic effects. We also show that this differential vertical advection contributes to the observed superadiabatic layer adjacent to the ocean surface, where the vertical gradient of the radial wind is reversed, but that the main cause of this unstable layer is heating from turbulent dissipation. The top of the “well-mixed” layer is thus distinct from the top of the boundary layer in tropical cyclones. The top of the inflow layer is a better proxy for the top of the boundary layer, but is not without limitations. These results may have implications for boundary-layer parameterisations that diagnose the boundary layer depth from thermodynamic, or partly thermodynamic, criteria.
- Published
- 2016
19. Additional notes, corrections and sporophyte descriptions for Mesochaete (Bryopsida: Aulacomniaceae) in Australia.
- Author
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Ramsay, H. P., Seppelt, R. D., and Downing, A. J.
- Subjects
- *
MOSSES , *PLANT species , *PERISTOME (Botany) , *PLANT spores , *PLANT morphology - Abstract
The genus Mesochaete Lindb. is known from tropical to temperate regions of the east coast of mainland Australia and Lord Howe Island. It includes two species, M. undulata Lindb. and M. taxiforme (Hampe) Watts & Whitel. Leaf size, leaf cell dimensions and aspects of leaf cross-sectional anatomy appear to be the most reliable morphological features to distinguish the species and new information is given in support of their retention as separate species. Incorrect statements in the Flora of Australia and other Australian treatments are rectified. As there are no previous illustrations of the sporophyte of M. taxiforme, or descriptions of the peristome and spores of either taxon, complete illustrations of the two Mesochaete species are presented with a supplementary description of the sporophyte and, where available, SEMs of peristomes and spores. One of the taxa, M. taxiforme, is represented by very little fruiting material. Consequently, only one sporophyte was sacrificed for the SEM work. Morphologically, peristomes and spores of both taxa appear almost identical. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
20. Handbook of Practical Planning for Art Collectors and Their Advisors.
- Author
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Slugg, Ramsay H.
- Subjects
Handbook of Practical Planning for Art Collectors and Their Advisors (Nonfiction work) -- Rozell, Mary -- Slugg, Ramsay H. -- Book reviews - Abstract
Art is an asset of passion, yet it has unique and important financial characteristics. These elements make art possibly the most difficult asset to incorporate into an overall estate and [...]
- Published
- 2015
21. Effect of topical imiquimod as primary treatment for lentigo maligna: the LIMIT-1 study.
- Author
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Marsden, J.R., Fox, R., Boota, N.M., Cook, M., Wheatley, K., Billingham, L.J., Steven, N.M., Simpkins, D., Whitham, D., Chalmers, J., Bunker, C., Wharton, S., Brothwell, S., Hague, L., Harwood, C., Ives, N., Ramsay, H., Burrows, L., Proby, C., and Motley, R.
- Subjects
MELANOMA treatment ,HYPERPLASIA ,IMMUNOSUPPRESSIVE agents ,T cells ,PHENOL oxidase - Abstract
Background Topical imiquimod is sometimes used for lentigo maligna ( LM) in situ melanoma instead of surgery, but frequency of cure is uncertain. Pathological complete regression ( pCR) is a logical surrogate marker for cure after imiquimod, although residual LM and atypical melanocytic hyperplasia may not be reliably distinguished. A trial comparing imiquimod vs. surgery might be justified by a high imiquimod pCR rate. Objectives Primary: to estimate the pCR rate for LM following imiquimod. Secondary: to assess the accuracy of prediction of pCR, using clinical complete regression ( cCR) plus negative post-treatment biopsies, tolerability, resource use, patients' preferences and induced melanoma immunity. Methods This was a single-arm phase II trial of 60 imiquimod applications over 12 weeks for LM then radical resection. A pCR rate ≥ 25 out of 33 would reliably discriminate between pCR rates < 60% and ≥ 85%. Clinical response was assessed and biopsies taken after imiquimod. Patients recorded adverse events in diaries. Patient preference was measured after surgery using a standard gamble tool. Results The pCR rate was 10 of 27 (37%, 95% confidence interval 19-58%). The rate of cCR plus negative biopsies was 12 of 28, of whom seven of 11 had pCR on subsequent surgery. The median dose intensity was 86·7%. Of the 16 surveyed patients, eight preferred primary imiquimod over surgery if the cure rate for imiquimod was 80%, and four of 16 if it was ≤ 40%. Conclusions The pCR rate was insufficient to justify phase III investigation of imiquimod vs. surgery. Clinical complete response and negative targeted biopsies left uncertainty regarding pathological clearance. Some patients would trade less aggressive treatment of LM against efficacy. [ABSTRACT FROM AUTHOR]
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- 2017
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22. Charitable giving after the 2017 Tax Act.
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Slugg, Ramsay H. and Hanes, Cindy
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TAX cut laws ,TAXATION of charitable giving ,CHARITABLE giving laws ,CHARITIES ,CHARITABLE giving ,GOVERNMENT policy - Abstract
The article discusses the impact of the 2017 Tax Cuts and Jobs Act on the level of charitable donations in the U.S. Topics discussed include decreasing federal income tax rates, the taxation deductions and gains from charitable donations, and offers suggestions for making tax-efficient donations for donors.
- Published
- 2018
23. Prioritisation of clinical trial learning needs of musculoskeletal researchers: an inter-disciplinary modified Delphi study by the Australia & New Zealand musculoskeletal clinical trials network.
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Filbay SR, Ferreira GE, Metcalf B, Buchbinder R, Ramsay H, Abbott JH, Darlow B, Zadro JR, Davidson SRE, Searle E, McKenzie BJ, and Hinman RS
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- Humans, New Zealand, Australia, Biomedical Research education, Needs Assessment, Research Design, Education, Distance, Delphi Technique, Musculoskeletal Diseases therapy, Clinical Trials as Topic, Research Personnel education
- Abstract
Background: There is a need to increase the capacity and capability of musculoskeletal researchers to design, conduct, and report high-quality clinical trials. The objective of this study was to identify and prioritise clinical trial learning needs of musculoskeletal researchers in Australia and Aotearoa New Zealand. Findings will be used to inform development of an e-learning musculoskeletal clinical trials course., Methods: A two-round online modified Delphi study was conducted with an inter-disciplinary panel of musculoskeletal researchers from Australia and Aotearoa New Zealand, representing various career stages and roles, including clinician researchers and consumers with lived experience of musculoskeletal conditions. Round 1 involved panellists nominating 3-10 topics about musculoskeletal trial design and conduct that they believe would be important to include in an e-learning course about musculoskeletal clinical trials. Topics were synthesised and refined. Round 2 asked panellists to rate the importance of all topics (very important, important, not important), as well as select and rank their top 10 most important topics. A rank score was calculated whereby higher scores reflect higher rankings by panellists., Results: Round 1 was completed by 121 panellists and generated 555 individual topics describing their musculoskeletal trial learning needs. These statements were grouped into 37 unique topics for Round 2, which was completed by 104 panellists. The topics ranked as most important were: (1) defining a meaningful research question (rank score 560, 74% of panellists rated topic as very important); (2) choosing the most appropriate trial design (rank score 410, 73% rated as very important); (3) involving consumers in trial design through to dissemination (rank score 302, 62% rated as very important); (4) bias in musculoskeletal trials and how to minimise it (rank score 299, 70% rated as very important); and (5) choosing the most appropriate control/comparator group (rank score 265, 65% rated as very important)., Conclusions: This modified Delphi study generated a ranked list of clinical trial learning needs of musculoskeletal researchers. Findings can inform training courses and professional development to improve researcher capabilities and enhance the quality and conduct of musculoskeletal clinical trials., (© 2024. The Author(s).)
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- 2024
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24. Models for delivery and co-ordination of primary or secondary health care (or both) to older adults living in aged care facilities.
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Putrik P, Grobler L, Lalor A, Ramsay H, Gorelik A, Karnon J, Parker D, Morgan M, Buchbinder R, and O'Connor D
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- Aged, Humans, Health Personnel, Quality of Life, Secondary Care, Homes for the Aged, Primary Health Care
- Abstract
Background: The number of older people is increasing worldwide and public expenditure on residential aged care facilities (ACFs) is expected to at least double, and possibly triple, by 2050. Co-ordinated and timely care in residential ACFs that reduces unnecessary hospital transfers may improve residents' health outcomes and increase satisfaction with care among ACF residents, their families and staff. These benefits may outweigh the resources needed to sustain the changes in care delivery and potentially lead to cost savings. Our systematic review comprehensively and systematically presents the available evidence of the effectiveness, safety and cost-effectiveness of alternative models of providing health care to ACF residents., Objectives: Main objective To assess the effectiveness and safety of alternative models of delivering primary or secondary health care (or both) to older adults living in ACFs. Secondary objective To assess the cost-effectiveness of the alternative models., Search Methods: We searched CENTRAL, MEDLINE, Embase, five other databases and two trials registers (WHO ICTRP, ClinicalTrials.gov) on 26 October 2022, together with reference checking, citation searching and contact with study authors to identify additional studies., Selection Criteria: We included individual and cluster-randomised trials, and cost/cost-effectiveness data collected alongside eligible effectiveness studies. Eligible study participants included older people who reside in an ACF as their place of permanent abode and healthcare professionals delivering or co-ordinating the delivery of healthcare at ACFs. Eligible interventions focused on either ways of delivering primary or secondary health care (or both) or ways of co-ordinating the delivery of this care. Eligible comparators included usual care or another model of care. Primary outcomes were emergency department visits, unplanned hospital admissions and adverse effects (defined as infections, falls and pressure ulcers). Secondary outcomes included adherence to clinical guideline-recommended care, health-related quality of life of residents, mortality, resource use, access to primary or specialist healthcare services, any hospital admissions, length of hospital stay, satisfaction with the health care by residents and their families, work-related satisfaction and work-related stress of ACF staff., Data Collection and Analysis: Two review authors independently selected studies for inclusion, extracted data, and assessed risk of bias and certainty of evidence using GRADE. The primary comparison was any alternative model of care versus usual care., Main Results: We included 40 randomised trials (21,787 participants; three studies only reported number of beds) in this review. Included trials evaluated alternative models of care aimed at either all residents of the ACF (i.e. no specific health condition; 11 studies), ACF residents with mental health conditions or behavioural problems (12 studies), ACF residents with a specific condition (e.g. residents with pressure ulcers, 13 studies) or residents requiring a specific type of care (e.g. residents after hospital discharge, four studies). Most alternative models of care focused on 'co-ordination of care' (n = 31). Three alternative models of care focused on 'who provides care' and two focused on 'where care is provided' (i.e. care provided within ACF versus outside of ACF). Four models focused on the use of information and communication technology. Usual care, the comparator in all studies, was highly heterogeneous across studies and, in most cases, was poorly reported. Most of the included trials were susceptible to some form of bias; in particular, performance (89%), reporting (66%) and detection (42%) bias. Compared to usual care, alternative models of care may make little or no difference to the proportion of residents with at least one emergency department visit (risk ratio (RR) 1.01, 95% confidence interval (CI) 0.84 to 1.20; 7 trials, 1276 participants; low-certainty evidence), but may reduce the proportion of residents with at least one unplanned hospital admission (RR 0.74, 95% CI 0.56 to 0.99, I
2 = 53%; 8 trials, 1263 participants; low-certainty evidence). We are uncertain of the effect of alternative models of care on adverse events (proportion of residents with a fall: RR 1.15, 95% CI 0.83 to 1.60, I² = 74%; 3 trials, 1061 participants; very low-certainty evidence) and adherence to guideline-recommended care (proportion of residents receiving adequate antidepressant medication: RR 5.29, 95% CI 1.08 to 26.00; 1 study, 65 participants) as the certainty of the evidence is very low. Compared to usual care, alternative models of care may have little or no effect on the health-related quality of life of ACF residents (MD -0.016, 95% CI -0.036 to 0.004; I² = 23%; 12 studies, 4016 participants; low-certainty evidence) and probably make little or no difference to the number of deaths in residents of ACFs (RR 1.03, 95% CI 0.92 to 1.16, 24 trials, 3881 participants, moderate-certainty evidence). We did not pool the cost-effectiveness or cost data as the specific costs associated with the various alternative models of care were incomparable, both across models of care as well as across settings. Based on the findings of five economic evaluations (all interventions focused on co-ordination of care), we are uncertain of the cost-effectiveness of alternative models of care compared to usual care as the certainty of the evidence is very low., Authors' Conclusions: Compared to usual care, alternative models of care may make little or no difference to the number of emergency department visits but may reduce unplanned hospital admissions. We are uncertain of the effect of alternative care models on adverse events (i.e. falls, pressure ulcers, infections) and adherence to guidelines compared to usual care, as the certainty of the evidence is very low. Alternative models of care may have little or no effect on health-related quality of life and probably have no effect on mortality of ACF residents compared to usual care. Importantly, we are uncertain of the cost-effectiveness of alternative models of care due to the limited, disparate data available., (Copyright © 2024 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.)- Published
- 2024
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25. Hallucinations as a risk marker for suicidal behaviour in individuals with a history of sexual assault: a general population study with instant replication.
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Yates K, Lång U, Peters EM, Wigman JTW, Boyda D, McNicholas F, Cannon M, Alderson-Day B, Bloomfield M, Ramsay H, and Kelleher I
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- Adult, Humans, Cross-Sectional Studies, Hallucinations epidemiology, Hallucinations psychology, Suicide, Attempted, Risk Factors, Suicidal Ideation, Sex Offenses psychology
- Abstract
Background: Research has shown a strong relationship between hallucinations and suicidal behaviour in general population samples. Whether hallucinations also index suicidal behaviour risk in groups at elevated risk of suicidal behaviour, namely in individuals with a sexual assault history, remains to be seen., Aims: We assessed whether hallucinations were markers of risk for suicidal behaviour among individuals with a sexual assault history., Methods: Using the cross-sectional 2007 ( N = 7403) and 2014 ( N = 7546) Adult Psychiatric Morbidity Surveys, we assessed for an interaction between sexual assault and hallucinations in terms of the odds of suicide attempt, as well as directly comparing the prevalence of suicide attempt in individuals with a sexual assault history with v. without hallucinations., Results: Individuals with a sexual assault history had increased odds of hallucinations and suicide attempt compared to individuals without a sexual assault history in both samples. There was a significant interaction between sexual assault and hallucinations in terms of the odds of suicide attempt. In total, 14-19% of individuals with a sexual assault history who did not report hallucinations had one or more suicide attempt. This increased to 33-52% of individuals with a sexual assault history who did report hallucinations (2007, aOR = 2.85, 1.71-4.75; 2014, aOR = 4.52, 2.78-7.35)., Conclusions: Hallucinations are a risk marker for suicide attempt even among individuals with an elevated risk of suicidal behaviour, specifically individuals with a sexual assault history. This finding highlights the clinical significance of hallucinations with regard to suicidal behaviour risk, even among high-risk populations.
- Published
- 2023
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26. Development of antidrug antibodies against adalimumab maps to variation within the HLA-DR peptide-binding groove.
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Tsakok T, Saklatvala J, Rispens T, Loeff FC, de Vries A, Allen MH, Barbosa IA, Baudry D, Dasandi T, Duckworth M, Meynell F, Russell A, Chapman A, McBride S, McKenna K, Perera G, Ramsay H, Ramesh R, Sands K, Shipman A, Burden AD, Griffiths CE, Reynolds NJ, Warren RB, Mahil S, Barker J, Dand N, Smith C, and Simpson MA
- Subjects
- Humans, Adalimumab therapeutic use, Antibodies, HLA-DR Antigens, Genome-Wide Association Study, Psoriasis
- Abstract
Targeted biologic therapies can elicit an undesirable host immune response characterized by the development of antidrug antibodies (ADA), an important cause of treatment failure. The most widely used biologic across immune-mediated diseases is adalimumab, a tumor necrosis factor inhibitor. This study aimed to identify genetic variants that contribute to the development of ADA against adalimumab, thereby influencing treatment failure. In patients with psoriasis on their first course of adalimumab, in whom serum ADA had been evaluated 6-36 months after starting treatment, we observed a genome-wide association with ADA against adalimumab within the major histocompatibility complex (MHC). The association signal mapped to the presence of tryptophan at position 9 and lysine at position 71 of the HLA-DR peptide-binding groove, with both residues conferring protection against ADA. Underscoring their clinical relevance, these residues were also protective against treatment failure. Our findings highlight antigenic peptide presentation via MHC class II as a critical mechanism in the development of ADA against biologic therapies and downstream treatment response.
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- 2023
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27. Potential for prediction of psychosis and bipolar disorder in Child and Adolescent Mental Health Services: a longitudinal register study of all people born in Finland in 1987.
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Lång U, Ramsay H, Yates K, Veijola J, Gyllenberg D, Clarke MC, Leacy FP, Gissler M, and Kelleher I
- Abstract
Current strategies to predict psychosis identify only a small proportion of individuals at risk. Additional strategies are needed to increase capacity for pre-diction and prevention of serious mental illness, ideally during childhood and adolescence. One possible approach would be to investigate systems in which psychosis risk factors are concentrated during childhood. One notable such system is represented by Child and Adolescent Mental Health Services (CAMHS). Although psychotic disorders are uncommon in CAMHS, many risk factors for psychosis are highly prevalent in young people who enter this system. We hypothesized, therefore, that youth attending CAMHS would be a high-risk group for psychosis if followed into adulthood and, furthermore, that CAMHS systems would capture a substantial proportion of future psychosis cases. We constructed a total population cohort study of all Finns born in 1987 (N=55,875), linking together extensive register data on health care contacts from birth through age 28 years. We identified all individuals diagnosed with a psychotic or bipolar disorder by age 28 (N=1,785). The risk of psychosis/bipolar disorder by age 28 years was 1.8% for individuals who had not attended CAMHS during childhood or adolescence, whereas it was 12.8% for those with a history of any outpatient CAMHS contact (odds ratio, OR=7.9, 95% CI: 7.2-8.7). Furthermore, the risk of psychosis/bipolar disorder by age 28 years was 2.3% for individuals without a history of inpatient CAMHS admission, whereas it was 24.0% for those with a history of inpatient CAMHS admission (OR=13.3, 95% CI: 11.9-14.9), and 36.5% for those with a history of inpatient CAMHS admission in adolescence (age 13-17 years) (OR=24.2, 95% CI: 21.2-27.6). Individuals who attended CAMHS but received no mental disorder diagnosis had an equally high risk of subsequently developing a psychosis/bipolar disorder as individuals who did receive a diagnosis (OR=0.9, 99.5% CI: 0.7-1.1). Compared to other CAMHS attendees, individuals who developed psychosis or bipolar disorder were more likely to have had an initial CAMHS diagnosis of depressive or other mood disorder (OR=2.3, 99.5% CI: 1.6-3.0) and disruptive behaviour disorder (OR=1.7, 99.5% CI: 1.2-2.5). Of all psychosis/bipolar diagnoses by age 28 years, 50.2% occurred in individuals who had, at some point in childhood or adolescence, attended CAMHS, indicating that CAMHS represent not only a high-risk but also a high-capacity system for prediction of psychosis/bipolar disorder. These findings suggest an enormous, untapped potential for large-scale psychosis/bipolar disorder prediction and prevention research within existing specialist CAMHS., (© 2022 World Psychiatric Association.)
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- 2022
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28. Hallucinations in the general population across the adult lifespan: prevalence and psychopathologic significance.
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Yates K, Lång U, Peters EM, Wigman JTW, McNicholas F, Cannon M, DeVylder J, Ramsay H, Oh H, and Kelleher I
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- Adolescent, Adult, Aged, Cross-Sectional Studies, Humans, Middle Aged, Prevalence, Risk Factors, Suicidal Ideation, Suicide, Attempted psychology, Young Adult, Hallucinations epidemiology, Longevity
- Abstract
Background: Community studies have found a relatively high prevalence of hallucinations, which are associated with a range of (psychotic and non-psychotic) mental disorders, as well as with suicidal ideation and behaviour. The literature on hallucinations in the general population has largely focused on adolescents and young adults., Aims: We aimed to explore the prevalence and psychopathologic significance of hallucinations across the adult lifespan., Method: Using the 1993, 2000, 2007 and 2014 cross-sectional Adult Psychiatric Morbidity Survey series (N = 33 637), we calculated the prevalence of past-year hallucinations in the general population ages 16 to ≥90 years. We used logistic regression to examine the relationship between hallucinations and a range of mental disorders, suicidal ideation and suicide attempts., Results: The prevalence of past-year hallucinations varied across the adult lifespan, from a high of 7% in individuals aged 16-19 years, to a low of 3% in individuals aged ≥70 years. In all age groups, hallucinations were associated with increased risk for mental disorders, suicidal ideation and suicide attempts, but there was also evidence of significant age-related variation. In particular, hallucinations in older adults were less likely to be associated with a cooccurring mental disorder, suicidal ideation or suicide attempt compared with early adulthood and middle age., Conclusions: Our findings highlight important life-course developmental features of hallucinations from early adulthood to old age.
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- 2021
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29. Hippocampal gamma and sharp-wave ripple oscillations are altered in a Cntnap2 mouse model of autism spectrum disorder.
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Paterno R, Marafiga JR, Ramsay H, Li T, Salvati KA, and Baraban SC
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- Action Potentials, Animals, Autism Spectrum Disorder genetics, Autism Spectrum Disorder metabolism, Disease Models, Animal, Hippocampus metabolism, Interneurons metabolism, Male, Mice, Mice, Inbred C57BL, Mice, Knockout, Mice, Transgenic, Pyramidal Cells metabolism, Spatial Behavior, Autism Spectrum Disorder pathology, Gamma Rhythm, Hippocampus pathology, Interneurons pathology, Membrane Proteins physiology, Nerve Tissue Proteins physiology, Pyramidal Cells pathology, Synaptic Transmission
- Abstract
Impaired synaptic neurotransmission may underly circuit alterations contributing to behavioral autism spectrum disorder (ASD) phenotypes. A critical component of impairments reported in somatosensory and prefrontal cortex of ASD mouse models are parvalbumin (PV)-expressing fast-spiking interneurons. However, it remains unknown whether PV interneurons mediating hippocampal networks crucial to navigation and memory processing are similarly impaired. Using PV-labeled transgenic mice, a battery of behavioral assays, in vitro patch-clamp electrophysiology, and in vivo 32-channel silicon probe local field potential recordings, we address this question in a Cntnap2-null mutant mouse model representing a human ASD risk factor gene. Cntnap2
-/- mice show a reduction in hippocampal PV interneuron density, reduced inhibitory input to CA1 pyramidal cells, deficits in spatial discrimination ability, and frequency-dependent circuit changes within the hippocampus, including alterations in gamma oscillations, sharp-wave ripples, and theta-gamma modulation. Our findings highlight hippocampal involvement in ASD and implicate interneurons as a potential therapeutical target., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.)- Published
- 2021
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30. Associations Between Maternal Prenatal C-Reactive Protein and Risk Factors for Psychosis in Adolescent Offspring: Findings From the Northern Finland Birth Cohort 1986.
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Ramsay H, Surcel HM, Björnholm L, Kerkelä M, Khandaker GM, and Veijola J
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- Adolescent, Adult, Child, Female, Finland epidemiology, Humans, Inflammation blood, Longitudinal Studies, Male, Pregnancy, Risk Factors, Academic Success, Adolescent Behavior, C-Reactive Protein, Inflammation epidemiology, Marijuana Use epidemiology, Prenatal Exposure Delayed Effects epidemiology, Psychotic Disorders epidemiology
- Abstract
Prenatal infection is associated with brain structural and functional abnormalities and may increase the risk for psychosis through a direct effect on neurodevelopment. Various infections may exert their effect through a proinflammatory immune response but studies of prenatal maternal inflammatory markers and offspring neurodevelopment are scarce. Using the longitudinal Northern Finland Birth Cohort 1986 study, we examined the associations of maternal prenatal C-reactive protein (CRP) levels with psychosis risk factors in adolescent offspring. CRP was measured in maternal sera collected in pregnancy. In offspring, school performance was measured at age 7 years, while school performance, psychotic experiences, and cannabis use were measured at age 16 years. We tested associations of CRP with offspring measures using regression analysis controlling for offspring sex, maternal education level, and prenatal maternal body mass index, smoking and alcohol use in pregnancy, place of birth, maternal psychiatric admission, paternal psychiatric admission, mothers age at birth, and gestational week of CRP sample. We also tested if adolescent cannabis use mediated the associations between maternal CRP and offspring outcomes. Controlling for covariates, maternal CRP was associated with academic performance at age 16 years (beta = .062, 95% CI = 0.036-0.088), but not with possible psychotic experiences at 16 years (odds ratio [OR] = 1.09, 95% CI = 0.96-1.24). Maternal CRP was also associated with adolescent cannabis use (OR = 1.24, 95% CI = 1.07-1.43). These findings suggest that prenatal inflammation may influence later mental illness risk by affecting neurodevelopment and also indirectly by increasing the risk of exposure to cannabis., (© The Author(s) 2020. Published by Oxford University Press on behalf of the Maryland Psychiatric Research Center.)
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- 2021
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31. Interneuron Origins in the Embryonic Porcine Medial Ganglionic Eminence.
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Casalia ML, Li T, Ramsay H, Ross PJ, Paredes MF, and Baraban SC
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- Animals, Female, Ganglia cytology, Male, Median Eminence cytology, Rats, Rats, Sprague-Dawley, Swine, Tissue Culture Techniques methods, Ganglia embryology, Ganglia transplantation, Interneurons transplantation, Median Eminence embryology, Median Eminence transplantation, Transplantation, Heterologous methods
- Abstract
Interneurons contribute to the complexity of neural circuits and maintenance of normal brain function. Rodent interneurons originate in embryonic ganglionic eminences, but developmental origins in other species are less understood. Here, we show that transcription factor expression patterns in porcine embryonic subpallium are similar to rodents, delineating a distinct medial ganglionic eminence (MGE) progenitor domain. On the basis of Nkx2.1, Lhx6, and Dlx2 expression, in vitro differentiation into neurons expressing GABA, and robust migratory capacity in explant assays, we propose that cortical and hippocampal interneurons originate from a porcine MGE region. Following xenotransplantation into adult male and female rat hippocampus, we further demonstrate that porcine MGE progenitors, like those from rodents, migrate and differentiate into morphologically distinct interneurons expressing GABA. Our findings reveal that basic rules for interneuron development are conserved across species, and that porcine embryonic MGE progenitors could serve as a valuable source for interneuron-based xenotransplantation therapies. SIGNIFICANCE STATEMENT Here we demonstrate that porcine medial ganglionic eminence, like rodents, exhibit a distinct transcriptional and interneuron-specific antibody profile, in vitro migratory capacity and are amenable to xenotransplantation. This is the first comprehensive examination of embryonic interneuron origins in the pig; and because a rich neurodevelopmental literature on embryonic mouse medial ganglionic eminence exists (with some additional characterizations in other species, e.g., monkey and human), our work allows direct neurodevelopmental comparisons with this literature., (Copyright © 2021 the authors.)
- Published
- 2021
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32. Cognition, psychosis risk and metabolic measures in two adolescent birth cohorts.
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Ramsay H, Barnett JH, Murray GK, Miettunen J, Mäki P, Järvelin MR, Smith GD, Ala-Korpela M, and Veijola J
- Subjects
- Academic Performance, Adolescent, Cohort Studies, Female, Finland epidemiology, Humans, Magnetic Resonance Spectroscopy, Male, Risk, United Kingdom epidemiology, Cognition physiology, Metabolomics, Psychotic Disorders epidemiology, Psychotic Disorders metabolism, Schizophrenia epidemiology, Schizophrenia metabolism
- Abstract
Background: Psychoses, especially schizophrenia, are often preceded by cognitive deficits and psychosis risk states. Altered metabolic profiles have been found in schizophrenia. However, the associations between metabolic profiles and poorer cognitive performance and psychosis risk in the population remain to be determined., Methods: Detailed molecular profiles were measured for up to 8976 individuals from two general population-based prospective birth cohorts: the Northern Finland Birth Cohort 1986 (NFBC 1986) and the Avon Longitudinal Study of Parents and Children (ALSPAC). A high-throughput nuclear magnetic resonance spectroscopy platform was used to quantify 70 metabolic measures at age 15-16 years in the NFBC 1986 and at ages 15 and 17 years in ALSPAC. Psychosis risk was assessed using the PROD-screen questionnaire at age 15-16 years in the NFBC 1986 or the psychotic-like symptoms assessment at age 17 years in ALSPAC. Cognitive measures included academic performance at age 16 years in both cohorts and general intelligence and executive function in ALSPAC. Logistic regression measured cross-sectional and longitudinal associations between metabolic measures and psychosis risk and cognitive performance, controlling for important covariates., Results: Seven metabolic measures, primarily fatty acid (FA) measures, showed cross-sectional associations with general cognitive performance, four across both cohorts (low density lipoprotein diameter, monounsaturated FA ratio, omega-3 ratio and docosahexaenoic acid ratio), even after controlling for important mental and physical health covariates. Psychosis risk showed minimal metabolic associations., Conclusions: FA ratios may be important in marking risk for cognitive deficits in adolescence. Further research is needed to clarify whether these biomarkers could be causal and thereby possible targets for intervention.
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- 2018
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33. RPE and Velocity Relationships for the Back Squat, Bench Press, and Deadlift in Powerlifters.
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Helms ER, Storey A, Cross MR, Brown SR, Lenetsky S, Ramsay H, Dillen C, and Zourdos MC
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- Adult, Female, Humans, Male, Young Adult, Perception, Physical Exertion physiology, Weight Lifting physiology, Weight Lifting psychology
- Abstract
Helms, ER, Storey, A, Cross, MR, Browm, SR, Lenetsky, S, Ramsay, H, Dillen, C, and Zourdos, MC. RPE and velocity relationships for the back squat, bench press, and deadlift in powerlifters. J Strength Cond Res 31(2): 292-297, 2017-The purpose of this study was to compare average concentric velocity (ACV) and rating of perceived exertion (RPE) based on repetitions in reserve on the squat, bench press, and deadlift. Fifteen powerlifters (3 women and 12 men, mean age 28.4 ± 8.5 years) worked up to a one repetition maximum (1RM) on each lift. Rating of perceived exertion was recorded on all sets, and the ACV was recorded for all sets performed at 80% of estimated 1RM and higher, up to 1RM. Rating of perceived exertion at 1RM on squat, bench press, and deadlift was 9.6 ± 0.5, 9.7 ± 0.4, and 9.6 ± 0.5, respectively and was not significantly different (p > 0.05). The ACV at 1RM on squat, bench press and deadlift was 0.23 ± 0.05, 0.10 ± 0.04, and 0.14 ± 0.05 m·second, respectively. Squat was faster than both bench press and deadlift (p > 0.001), and deadlift was faster than bench press (p = 0.05). Very strong relationships (r = 0.88-0.91) between percentage 1RM and RPE were observed on each lift. The ACV showed strong (r = -0.79 to -0.87) and very strong (r = -0.90 to 92) inverse relationships with RPE and percentage 1RM on each lift, respectively. We conclude that RPE may be a useful tool for prescribing intensity for squat, bench press, and deadlift in powerlifters, in addition to traditional methods such as percentage of 1RM. Despite high correlations between percentage 1RM and ACV, a "velocity load profile" should be developed to prescribe intensity on an individual basis with appropriate accuracy.
- Published
- 2017
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34. The effect of prenatal smoking exposure on daily smoking among teenage offspring.
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Niemelä S, Räisänen A, Koskela J, Taanila A, Miettunen J, Ramsay H, and Veijola J
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- Adolescent, Female, Finland epidemiology, Follow-Up Studies, Humans, Male, Pregnancy, Risk Factors, Smoking Cessation statistics & numerical data, Surveys and Questionnaires, Adolescent Behavior, Mothers statistics & numerical data, Prenatal Exposure Delayed Effects epidemiology, Smoking epidemiology
- Abstract
Aims: To study the predictive associations between maternal smoking and the impact of quitting smoking during pregnancy and offspring daily smoking at age 15-16 years., Design: The Northern Finland Birth Cohort 1986 (NFBC86) includes 99% of all births in the region and has an ongoing follow-up. Data were collected using questionnaires at 24th gestational week during pregnancy and after delivery, and at follow-up in 2001-02, when the offspring were aged 15-16 years., Setting: Northern Finland., Participants: NFBC86 included 9432 live born children. Data regarding maternal smoking during pregnancy and offspring smoking at age 15-16 years were available for 4462 subjects (47.3% of the original sample)., Measurements: The outcome was offspring's self-reported daily smoking. Maternal smoking during pregnancy was considered using a four-class variable: (1) no smoking, (2) mother had smoked, but had quit smoking before becoming pregnant, (3) mother quit smoking during the 1st trimester and (4) mother quit smoking after the 1st trimester or continued smoking throughout the pregnancy. Information regarding paternal smoking during pregnancy, maternal and paternal smoking and education level, family structure and dwelling at offspring's age 15-16 years were considered potential confounding variables., Findings: Continuing smoking after the 1st trimester increased the odds of daily smoking among offspring, independently of confounding factors [odds ratio (OR) = 1.8, 95% confidence interval (CI) = 1.3-2.5]. Continuing to smoke after the 1st trimester was associated with higher odds compared with quitting smoking during the 1st trimester. Also, parental smoking at offspring age 15-16 years increased the odds of offspring daily smoking, independently of prenatal smoking exposure., Conclusions: Prenatal smoking exposure increases the risk for offspring adolescent daily smoking. Quitting smoking during the early stages of pregnancy may decrease the odds for offspring smoking., (© 2016 Society for the Study of Addiction.)
- Published
- 2017
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35. Smoking in pregnancy, adolescent mental health and cognitive performance in young adult offspring: results from a matched sample within a Finnish cohort.
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Ramsay H, Barnett JH, Murray GK, Mäki P, Hurtig T, Nordström T, Miettunen J, Kiviniemi V, Niemelä S, Pausova Z, Paus T, and Veijola J
- Subjects
- Adolescent, Adult Children statistics & numerical data, Cognition, Cognition Disorders chemically induced, Female, Finland, Humans, Hyperkinesis diagnosis, Male, Mental Health, Pregnancy, Prenatal Exposure Delayed Effects chemically induced, Smoking adverse effects, Young Adult, Adult Children psychology, Cognition Disorders epidemiology, Prenatal Exposure Delayed Effects epidemiology, Smoking epidemiology
- Abstract
Background: The association between prenatal exposure to maternal cigarette smoking (PEMCS) and adult cognition is debated, including if there are differences according to sex. We aimed to determine if there are associations between PEMCS and cognition in early adulthood in men and women and examine if observed associations were mediated by adolescent mental health factors that are associated with cognition, namely psychotic-like experiences (PLEs), inattention and hyperactivity, and other externalizing behaviors., Methods: Participants were 471 individuals drawn from the general population-based Northern Finland 1986 Birth Cohort (NFBC 1986) followed up from pregnancy and birth to early adulthood; individuals with PEMCS were matched with those without PEMCS by socioeconomic and demographic factors. Cognitive performance in adulthood was assessed with a range of tests and their association with PEMCS was measured by sex using hierarchical linear regression, unadjusted and then controlling for potential confounders, mediators and moderators, including adolescent mental health factors., Results: There were no associations between PEMCS and cognitive scores in females. In males, there were associations with vocabulary (beta = -0.444, 95% CI: -0.783, -0.104) and matrix reasoning (beta = -0.379, 95% CI: -0.711, -0.047)., Conclusions: While associations between PEMCS and cognition were limited, observed findings with measures of general intelligence in males contribute to suggestions of differences in response to PEMCS by sex. Furthermore, observed associations may be partly mediated by earlier inattention and hyperactivity. Findings add support to efforts aimed to eliminate smoking in pregnancy.
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- 2016
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36. "It's for us -newcomers, LGBTQ persons, and HIV-positive persons. You feel free to be": a qualitative study exploring social support group participation among African and Caribbean lesbian, gay, bisexual and transgender newcomers and refugees in Toronto, Canada.
- Author
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Logie CH, Lacombe-Duncan A, Lee-Foon N, Ryan S, and Ramsay H
- Subjects
- Adult, Africa, Canada, Caribbean Region, Female, HIV Infections, Health Status Disparities, Healthcare Disparities, Humans, Male, Mental Health, Qualitative Research, Social Capital, Social Determinants of Health, Social Discrimination, Social Stigma, Young Adult, Emigrants and Immigrants, Ethnicity, Health Services, Refugees, Sexual and Gender Minorities, Social Isolation, Social Support
- Abstract
Background: Stigma and discrimination harm the wellbeing of lesbian, gay, bisexual and transgender (LGBT) people and contribute to migration from contexts of sexual persecution and criminalization. Yet LGBT newcomers and refugees often face marginalization and struggles meeting the social determinants of health (SDOH) following immigration to countries such as Canada. Social isolation is a key social determinant of health that may play a significant role in shaping health disparities among LGBT newcomers and refugees. Social support may moderate the effect of stressors on mental health, reduce social isolation, and build social networks. Scant research, however, has examined social support groups targeting LGBT newcomers and refugees. The purpose of this qualitative study was to explore experiences of social support group participation among LGBT African and Caribbean newcomers and refugees in an urban Canadian city., Methods: We conducted 3 focus groups with a venue-based sample of LGBT African and Caribbean newcomers and refugees (n = 29) who attended social support groups at an ethno-specific AIDS Service Organization. Focus groups followed a semi-structured interview guide and were analyzed using narrative thematic techniques., Results: Participant narratives highlighted immigration stressors, social isolation, mental health issues, and challenges meeting the SDOH. Findings reveal multi-level benefits of social support group participation at intrapersonal (self-acceptance, improved mental health), interpersonal (reduced isolation, friendships), community (reciprocity, reduced stigma and discrimination), and structural (housing, employment, immigration, health care) levels., Conclusions: Findings suggest that social support groups tailored for LGBT African and Caribbean newcomers and refugees can address social isolation, community resilience, and enhance resource access. Health care providers can provide support groups, culturally and LGBT competent health services, and resource access to promote LGBT newcomers and refugees' health and wellbeing.
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- 2016
- Full Text
- View/download PDF
37. Atypical rosacea in a male patient: case study.
- Author
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Debroy Kidambi A, Tiffin NJ, and Ramsay HM
- Subjects
- Adult, Anti-Infective Agents therapeutic use, Anti-Inflammatory Agents therapeutic use, Dermatologic Agents therapeutic use, Drug Therapy, Combination, Facial Dermatoses pathology, Humans, Isotretinoin therapeutic use, Male, Nose, Prednisolone therapeutic use, Rosacea pathology, Trimethoprim therapeutic use, Facial Dermatoses diagnosis, Facial Dermatoses drug therapy, Rosacea diagnosis, Rosacea drug therapy
- Abstract
Rosacea fulminans is a rare disorder of unknown cause, almost exclusively affecting women. There are only a few reported cases in men. The condition is characterized by the abrupt onset of pustules and nodules predominantly affecting the cheeks or chin without any systemic upset. We report the case of a 37-year-old man who presented with papulopustules, predominantly localized to his nose. Histopathological features were consistent with rosacea fulminans. The patient was managed with treatments including oral prednisolone, isotretinoin, and trimethioprim.
- Published
- 2016
38. Association between Dopamine Receptor D2 (DRD2) Variations rs6277 and rs1800497 and Cognitive Performance According to Risk Type for Psychosis: A Nested Case Control Study in a Finnish Population Sample.
- Author
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Ramsay H, Barnett JH, Miettunen J, Mukkala S, Mäki P, Liuhanen J, Murray GK, Jarvelin MR, Ollila H, Paunio T, and Veijola J
- Subjects
- Adult, Case-Control Studies, Female, Finland epidemiology, Genotype, Humans, Male, Psychomotor Performance, Psychotic Disorders epidemiology, Risk Factors, Young Adult, Alleles, Cognition, Polymorphism, Single Nucleotide, Psychotic Disorders genetics, Psychotic Disorders psychology, Receptors, Dopamine D2 genetics
- Abstract
Background: There is limited research regarding the association between genes and cognitive intermediate phenotypes in those at risk for psychotic disorders., Methods: We measured the association between established psychosis risk variants in dopamine D2 receptor (DRD2) and cognitive performance in individuals at age 23 years and explored if associations between cognition and these variants differed according to the presence of familial or clinical risk for psychosis. The subjects of the Oulu Brain and Mind Study were drawn from the general population-based Northern Finland 1986 Birth Cohort (NFBC 1986). Using linear regression, we compared the associations between cognitive performance and two candidate DRD2 polymorphisms (rs6277 and rs1800497) between subjects having familial (n=61) and clinical (n=45) risk for psychosis and a random sample of participating NFBC 1986 controls (n=74). Cognitive performance was evaluated using a comprehensive battery of tests at follow-up., Results: Principal components factor analysis supported a three-factor model for cognitive measures. The minor allele of rs6277 was associated with poorer performance on a verbal factor (p=0.003) but this did not significantly interact with familial or clinical risk for psychosis. The minor allele of rs1800497 was associated with poorer performance on a psychomotor factor (p=0.038), though only in those at familial risk for psychotic disorders (interaction p=0.049)., Conclusion: The effect of two DRD2 SNPs on cognitive performance may differ according to risk type for psychosis, suggesting that cognitive intermediate phenotypes differ according to the type (familial or clinical) risk for psychosis.
- Published
- 2015
- Full Text
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39. A new approach to improving healthcare personnel influenza immunization programs: a randomized controlled trial.
- Author
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Chambers LW, Crowe L, Lam PP, MacDougall D, McNeil S, Roth V, Suh K, Dalzell C, Baker D, Ramsay H, DeCoutere S, Hall HL, and McCarthy AE
- Subjects
- Humans, Health Personnel, Immunization Programs methods, Influenza, Human immunology, Influenza, Human prevention & control, Quality of Health Care
- Abstract
Background: Healthcare personnel influenza immunization rates remain sub-optimal. Following multiple studies and expert consultations, the "Successful Influenza Immunization Programs for Healthcare Personnel: A Guide for Program Planners" was produced. This trial assessed the impact of the Guide with facilitation in improving healthcare personnel influenza immunization rates in Canadian healthcare organizations., Methods: A sample of 26 healthcare organizations across six Canadian provinces (ON, MB, NS, BC, SK, NL) was randomized to Intervention (n=13) or Control groups (n=13). Baseline influenza immunization rates were obtained for 2008-2009; the study groups were followed over two subsequent influenza seasons. The Intervention group received the Guide, facilitation support through workshops for managers and ongoing support. The Control groups conducted programs as usual. The Groups were compared using their reported influenza healthcare personnel influenza immunization rates and scores from a program assessment questionnaire., Findings: Twenty-six organizations agreed to participate. 35% (9/26) of sites were acute care hospitals, 19% (5/26) continuing care, long-term care organizations or nursing homes, and 46% (12/26) were mixed acute care hospitals and long-term care or regional health authorities. The median rate of influenza immunization among healthcare personnel for the Intervention group was 43%, 44%, and 51% at three points in time respectively, and in the, Control Group: 62%, 57%, and 55% respectively. No significant differences were observed between the groups at the three points in time. However, there was a 7% increase in the median rates between the Baseline Year and Year Two in the Intervention group, and a 6% decrease in the CONTROL GROUP over the same time period, which was statistically significant (0.071 versus -0.058, p < 0.001)., Interpretation: This pragmatic randomized trial of the Guide with facilitation of its implementation improved healthcare personnel immunization rates, but these rates continued to be sub-optimal and below rates achievable in programs requiring personnel to be immunized., Trial Registration: ClinicalTrials.gov NCT01207518.
- Published
- 2015
- Full Text
- View/download PDF
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