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Dive into the research topics where Amélie Pelletier is active.

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Featured researches published by Amélie Pelletier.


Parkinsonism & Related Disorders | 2013

Doxepin and cognitive behavioural therapy for insomnia in patients with Parkinson's disease – A randomized study

S. Rios Romenets; Laura Creti; Catherine S. Fichten; Sally Bailes; Eva Libman; Amélie Pelletier; Ronald B. Postuma

INTRODUCTIONnAlthough a variety of pharmacologic and non-pharmacologic treatments are effective for insomnia in the general population, insomnia in Parkinsons disease differs in important ways and may need different treatments. No studies have conclusively demonstrated effective insomnia treatments in Parkinsons disease.nnnMETHODSnWe conducted a three-arm six-week randomized pilot study assessing non-pharmacologic treatment (cognitive behavioural therapy with bright light therapy) or doxepin (10 mg daily), compared to an inactive placebo in Parkinsons patients with insomnia. Sleep outcomes included insomnia scales, clinical global impression, sleep diaries and actigraphy. Secondary outcomes included motor severity, fatigue, depression and quality of life.nnnRESULTSn18 patients were randomized, 6 to each group. Compared to placebo, doxepin improved the Insomnia Severity Index (-9 ± 5.4 vs. -2 ± 3.9, p = 0.03), the SCOPA-night score (-5.2 ± 1.5 vs. -2.3 ± 2.8, p = 0.049), the Pittsburgh Sleep Quality Index-sleep disturbances subscale (-0.5 ± 0.5 vs 0.2 ± 0.4, p = 0.02), and both patient and examiner-rated clinical global impression of change (1.7 ± 0.8 vs. 0.5 ± 0.8, p = 0.03 and 1.4 ± 0.5 vs. 0.3 ± 0.5, p = 0.003). On secondary outcomes doxepin reduced the fatigue severity scale (p = 0.02) and improved scores on the Montreal Cognitive Assessment (p = 0.007). Non-pharmacological treatment reduced the Insomnia Severity Index (-7.8 ± 3.8 vs. -2.0 ± 3.9, p = 0.03), and the examiner-reported clinical global impression of change (p = 0.006), but was associated with decline in Parkinson Disease Questionnaire-39. There were no changes in other primary and secondary outcomes, including actigraphy outcomes. Adverse events were comparable in all groups.nnnCONCLUSIONnDoxepin and non-pharmacologic treatment substantially improved insomnia in Parkinsons disease. These potential benefits must be replicated in a full confirmatory randomized controlled trial.


Movement Disorders | 2017

Validation of the MDS research criteria for prodromal Parkinson's disease: Longitudinal assessment in a REM sleep behavior disorder (RBD) cohort

Seyed-Mohammad Fereshtehnejad; Jacques Montplaisir; Amélie Pelletier; Jean-François Gagnon; Daniela Berg; Ronald B. Postuma

Background: Recently, the International Parkinson and Movement Disorder Society introduced the prodromal criteria for PD.


Canadian Journal on Aging-revue Canadienne Du Vieillissement | 2009

Exploring the Acceptability and Feasibility of Conducting a Large Longitudinal Population­Based Study in Canada

Susan Kirkland; Parminder Raina; Christina Wolfson; Geoff Strople; Olga Kits; Steven Dukeshire; Camille L. Angus; Karen Szala-Meneok; Jennifer Uniat; Homa Keshavarz; Linda Furlini; Amélie Pelletier

Le recrutement et la rétention réussis lors détudes longitudinales basées sur la population exigent la compréhension des facilitants et des barrières à la participation. Les points de vue des Canadiens(nes) concernant une telle étude proposée, lÉtude longitudinale canadienne sur le vieillissement (ÉLCV), ont été explorés. Des groupes de discussion de participants âgés de ≥ 40 ans ont été mis en place dans six emplacements proposés pour la collecte de données de lÉLCV (Halifax, Montréal, Hamilton, Winnipeg, Calgary et Vancouver) pour discuter de la participation possible à une étude à long terme sur le vieillissement en santé. Il y avait un soutien marqué pour la recherche longitudinale sur la santé et le vieillissement. Laltruisme était une motivation clée à la participation et les universités ont été perçues comme des institutions crédibles pour entreprendre de telles études. Les participants ont eu peu dinquiétude à légard du don déchantillons biologiques, mais ont exprimé quelques inquiétudes concernant lutilisation inapproprié du matériel génétique, la commercialisation des données de participant et les questions reliées à la confidentialité et la vie privée. Ces résultats ont déjà eu un impact sur le travail actuel, et futur, de lÉLCV, et fourniront également des informations utiles aux chercheurs qui entreprennent dautres études longitudinales basées sur la population.Successful recruitment and retention for population-based longitudinal studies requires understanding facilitators and barriers to participation. This study explored Canadians views regarding one such study, the proposed Canadian Longitudinal Study on Aging (CLSA). Focus groups of participants ≥ 40 years of age were held in six proposed CLSA data collection sites (Halifax, Montreal, Hamilton, Winnipeg, Calgary, and Vancouver) to discuss participating in a long-term study of healthy aging. There was fundamental support for longitudinal research on health and aging. Altruism was a key motivation to participation, and universities were viewed as credible parties to conduct such studies. Participants had few worries about providing biological samples but expressed concern about potential misuse of genetic materials, commercialization of participant data, and privacy issues. These findings have already informed current, and will inform future, work on the CLSA, and will also provide useful information to researchers who undertake other population-based longitudinal studies.


Canadian Journal on Aging-revue Canadienne Du Vieillissement | 2009

Telephone-Administered Cognitive Tests as Tools for the Identification of Eligible Study Participants for Population-Based Research in Aging

Christina Wolfson; Susan Kirkland; Parminder Raina; Jennifer Uniat; Karen Roberts; Howard Bergman; Linda Furlini; Amélie Pelletier; Geoff Strople; Camille L. Angus; Homa Keshavarz; Karen Szala-Meneok

Lors du processus de recrutement, lÉtude longitudinale canadienne sur le vieillissement (ÉLCV) fera face au défi didentifier les individus qui ne possèdent pas suffisamment de compétences pour donner un consentement éclairé. Pendant le processus délaboration de lÉLCV, une revue de la littérature a été faite dans le but didentifier les outils téléphoniques existants qui permettent le dépistage des déficits cognitifs et qui pourraient être utilisés pour identifier les participants éligibles pour une étude sur le vieillissement fondée sur la population. Nous avons identifié 12 outils téléphonique, quatre étaient basés sur lexamen de létat mini-mental (MMSE) et huit étaient basés sur dautres tests de dépistage de létat cognitif administrés en personne. Les caractéristiques, incluant les items mesurés, le temps requis pour ladministration, le mode de pointage-classification, de même que toutes informations concernant la validation de chaque outil, ont été extraites et résumées.As part of its recruitment process, the Canadian Longitudinal Study on Aging (CLSA) will face the challenge of screening out individuals who are sufficiently impaired in their ability to provide informed consent. In the process of developing the design of the CLSA, a review of the literature was performed with the goal of identifying currently existing telephone cognitive screening tools that can be used to identify eligible study participants for population-based research on aging. We identified 12 telephone screening tools, four of which were based on the Mini-Mental State Exam (MMSE) and eight that were based on other face-to-face screening tools. Characteristics – including the constructs measured, the length of time for administration, the scoring/classification scheme, and any information regarding the validation of each tool – were extracted and summarized.


Canadian Journal on Aging-revue Canadienne Du Vieillissement | 2009

The Canadian Community Health Survey as a Potential Recruitment Vehicle for the Canadian Longitudinal Study on Aging

Christina Wolfson; Parminder Raina; Susan Kirkland; Amélie Pelletier; Jennifer Uniat; Linda Furlini; Camille L. Angus; Geoff Strople; Homa Keshavarz; Karen Szala-Meneok

Le but de lÉtude longitudinale canadienne sur le vieillissement (ÉLCV) est de recruter 50 000 participants âgés de 45 à 85 ans et de les suivre pendant 20 ans. Les processus déchantillonnage et de recrutement pour une étude de cette envergure représentent dimportants défis. Statistique Canada a été approché pour collaborer avec lÉLCV dans le but de déterminer si lEnquête sur la santé dans les collectivités canadiennes (ESCC) pourrait être utilisée comme véhicule de recrutement pour lÉLCV. Dans cette étude pilote réalisée en 2004, il a été déterminé que 63,8 pour cent et 75,8 pour cent des répondants accepteraient de partager leurs coordonnées et leurs réponses à lESCC avec lÉLCV, respectivement. Les réticences les plus souvent rapportées étaient reliées à la confidentialité, le manque dintérêt et le niveau dengagement demandé. Cette étude pilote a permis didentifier quelques défis reliés à lutilisation de lESCC comme véhicule de recrutement pour lÉLCV.The goal of the Canadian Longitudinal Study on Aging (CLSA) is to recruit 50,000 participants aged 45 to 85 years of age and follow them for at least 20 years. The sampling and recruitment processes for a study of this scope and magnitude present important challenges. Statistics Canada was approached to collaborate with the CLSA with the goal of determining whether the Canadian Community Health Survey (CCHS) could be used as a recruitment vehicle for the CLSA. In this pilot study conducted in 2004, it was determined that 63.8 per cent and 75.8 per cent of the respondents agreed to share their contact information and their survey responses with the CLSA, respectively. The most commonly reported concerns were confidentiality/privacy issues, lack of interest, and commitment issues. This pilot study identified some challenges to the use of the CCHS as a recruitment vehicle for the CLSA.


Canadian Journal on Aging-revue Canadienne Du Vieillissement | 2009

Accessing health care utilization databases for health research: a Canadian longitudinal study on aging feasibility study.

Parminder Raina; Susan Kirkland; Christina Wolfson; Karen Szala-Meneok; Lauren Griffith; Homa Keshavarz; Jennifer Uniat; Linda Furlini; Camille L. Angus; Geoff Strople; Amélie Pelletier

Une des clés au succès de lÉtude longitudinale canadienne sur le vieillissement (ÉLCV) sera de tirer profit des sources de données secondaires, en particulier données relatives à lutilisation des soins de santé (USS). Pour examiner les aspects pratiques, méthodologiques et éthiques daccéder à des données sur lUSS, des entrevues qualitatives individuelles ont été réalisés auprès de 53 administrateurs de données et commissaires/ombudsman à la protection de la vie privée à travers le Canada. Les participants de létude ont indiqué que dobtenir la permission daccéder à des données sur lUSS est généralement possible; cependant, ils ont noté que ce processus sera complexe et long, exigeant des travaux préparatoires considérables et méticuleux afin de sassurer que la documentation soit appropriée et que le tout soit conforme aux variations juridiques ainsi quaux lignes, législatives et politiques.One of the keys to the success of the Canadian Longitudinal Study on Aging (CLSA) will be the leveraging of secondary data sources, particularly health care utilization (HCU) data. To examine the practical, methodological, and ethical aspects of accessing HCU data, one-on-one qualitative interviews were conducted with 53 data stewards and privacy commissioners/ombudsmen from across Canada. Study participants indicated that obtaining permission to access HCU data is generally possible; however, they noted that this will be a complex and lengthy process requiring considerable and meticulous preparatory work to ensure proper documentation and compliance with jurisdictional variations along legislative and policy lines.


Epilepsia | 2014

The diagnostic test accuracy of a screening questionnaire and algorithm in the identification of adults with epilepsy

Mark R. Keezer; Amélie Pelletier; Barbara Stechysin; Martin Veilleux; Nathalie Jette; Christina Wolfson

Accurate estimates of the incidence and prevalence of epilepsy allow us to better assess its societal impact. Prevalence and incidence studies often use unvalidated screening tools resulting in estimates of uncertain accuracy. We present the Canadian Longitudinal Study on Aging—Epilepsy Algorithm (CLSA‐EA) as well as the results of our validation study designed to estimate the diagnostic accuracy of this epilepsy ascertainment algorithm.


Canadian Journal on Aging-revue Canadienne Du Vieillissement | 2009

Ascertainment of Chronic Diseases in the Canadian Longitudinal Study on Aging (CLSA), Systematic Review

Parminder Raina; Christina Wolfson; Susan Kirkland; Homa Keshavarz; Lauren Griffith; Christopher Patterson; Jennifer Uniat; Geoff Strople; Amélie Pelletier; Camille L. Angus

Les procédures diagnostiques cliniques standards sont souvent inappropriées et fréquemment non applicables dans des études basées sur la population; pourtant, vérifier le statut précis dune maladie est essentiel. Nous avons fait une revue systématique pour identifier des algorithmes, des critères, et des outils utilisés pour identifier 17 maladies chroniques, et avons fait la praticabilité de développer des algorithmes pour lÉLCV. Des 29 616 citations examinées, 668 papiers ont rencontré tous les critères dinclusion. Nous avons déterminé que linformation incluse dans un algorithme de maladie différera selon le type de condition. Le diagnostic de quelques conditions symptomatiques, telles larthrose et larthrite, exigera la justification par des critères cliniques (par exemple, rayons X, mesure de densité osseuse) tandis que dautres conditions, telles la dépression, se baseront seulement sur les dires des individus. Les conditions asymptomatiques, telles lhypertension, sont plus difficiles à vérifier par les dires des individus et exigeront des mesures physiologiques additionnelles (par exemple, tension artérielle) et des mesures de laboratoire (par exemple, glucose). Cette étude pilote a identifié les outils nécessaires pour développer des algorithmes dévaluation de diagnostic.Standard clinical diagnostic procedures are often inappropriate and frequently not feasible to apply in population-based studies, yet ascertaining accurate disease status is essential. We conducted a systematic review to identify algorithms, criteria, and tools used to ascertain 17 chronic diseases, and assessed the feasibility of developing algorithms for the CLSA. Of the 29,616 citations screened, 668 papers met all inclusion criteria. We determined that the information included in a disease algorithm will differ by condition type. The diagnosis of some symptomatic conditions, such as osteoarthritis and arthritis, will require substantiation by clinical criteria (e.g., x-rays, bone density measurement) while other conditions, such as depression, will rely solely on self-report. Asymptomatic conditions, such as hypertension, are more difficult to ascertain by self-report and will require additional physiologic measures (e.g., blood pressure) as well as laboratory measures (e.g., glucose). This pilot study identified the tools necessary to develop disease ascertainment algorithms.


Canadian Journal on Aging-revue Canadienne Du Vieillissement | 2009

Feasibility of Biological Specimen Collection for the Canadian Longitudinal Study on Aging (CLSA) Biorepository

Cynthia Balion; Parminder Raina; Christina Wolfson; Susan Kirkland; Judy L. Keys; Lauren Griffith; Amélie Pelletier; Jennifer Uniat; Matthew J. McQueen

La collecte de spécimens biologiques est une partie intégrale de beaucoup détudes épidémiologiques longitudinales. Il est important dobtenir un haut taux de satisfaction de la part des participants pour que leur participation soit continue et pour assurer une qualité élevée des échantillons pour avoir des mesures précises pour les biomarqueurs. Nous avons réalisé une étude pour évaluer ces questions sur la collecte déchantillons proposée pour lÉtude longitudinale canadienne sur le vieillissement (ÉLCV). Parmi les 85 participants recrutés, 65 ont été dirigés vers un laboratoire dhôpital ou un laboratoire privé. Environ 100 mL de sang et un prélèvement aléatoire durine ont été collectés pour chaque participant, pour un total de 2 108 aliquots déchantillon. Les niveaux de qualité ont été atteints pour plus de 90% des échantillons et étaient semblables pour les échantillons collectés dans les deux laboratoires. Plus de 90% des participants ont exprimé que leur satisfaction par rapport à la collecte était bonne ou excellente, et 84% serait prêts à répéter la collecte dans un à trois ans.Biological specimen collection is an integral part of many longitudinal epidemiological studies. It is important to achieve high participant satisfaction for continuing involvement, and high sample quality for accurate biomarker measurement. We conducted a study to evaluate these issues on the sample collection proposed for the Canadian Longitudinal Study on Aging (CLSA). There were 85 participants recruited, and 65 attended either a hospital laboratory or private laboratory. Approximately 100 mL of blood and a random urine specimen were collected from each participant for a total of 2,108 sample aliquots. Quality standards were met for more than 90 per cent of samples and were similar for samples collected in both laboratories. More than 90 per cent of participants rated satisfaction with the collection as being good or excellent, and 84 per cent would be willing to repeat the collection in one to three years.


Parkinsonism & Related Disorders | 2018

Longstanding disease-free survival in idiopathic REM sleep behavior disorder: Is neurodegeneration inevitable?

Chun Yao; Seyed-Mohammad Fereshtehnejad; Benjamin K. Dawson; Amélie Pelletier; Ziv Gan-Or; Jean-François Gagnon; Jacques Montplaisir; Ronald B. Postuma

INTRODUCTIONnStudies estimate that >80% of patients with idiopathic REM sleep behavior disorder (iRBD) eventually develop parkinsonism or dementia. However, a small group remains disease-free for long periods, raising the question of whether they truly have prodromal disease.nnnMETHODSnWe selected subjects with iRBD who were diagnosed at least 10 years previously, and were still disease free (longstanding iRBD) (nu202f=u202f11). We compared them to early converters (nu202f=u202f27) defined as those who phenoconverted to parkinsonism or dementia within 4 years after diagnosis, and to age- and sex-matched healthy controls (nu202f=u202f68). We compared the frequency and progression of numerous markers of prodromal synucleinopathy between groups, and assessed likelihood of meeting prodromal Parkinsons disease criteria.nnnRESULTSnAfter at least 10 years follow-up, almost all longstanding iRBD subjects showed multiple features of neurodegeneration, and 9/11 met criteria for prodromal PD. Evolution of markers was slower than early-converters, with an annual increase in prodromal PD probability of 3.9u202f±u202f3.2% in longstanding iRBD compared to 12.4u202f±u202f7.8% for early-convertors (p-valueu202f=u202f0.002). However, subjects with longstanding iRBD at their last visit had similar prodromal measures as the baseline evaluation of the early-convertors, with similarly-abnormal UPDRS scores, quantitative motor tests, cognition and autonomic symptoms and signs.nnnCONCLUSIONnAlthough phenoconversion rates can differ dramatically between patients, almost all individuals with iRBD in our cohort appear to have underlying neurodegeneration.

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Jennifer Uniat

McGill University Health Centre

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Linda Furlini

McGill University Health Centre

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