Christophe Huynh

Institut universitaire sur les dépendances

Contexte : Les milieux d’hébergement et de soins de longue durée peinent à répondre aux besoins des aîné(e)s en perte d’autonomie qui consomment des substances psychoactives (SPA). L’absence de prise en charge adaptée aggrave néanmoins les effets des consommations et accentue la perte d’autonomie. Objectifs du projet Notre objectif a été de docume...

Contexte : Les milieux d’hébergement et de soins de longue durée pour aîné(e)s accueillent de plus en plus de personnes présentant un usage, parfois problématique, de substances psychoactives (SPA). La COVID-19 a obligé ces milieux à rapidement concilier mesures sanitaires et défis liés à tout ce qui entoure ces usages de SPA, sans disposer de lign...

Les établissements d'hébergement et de soins de longue durée pour personnes âgées accueillent de plus en plus fréquemment des résident(e)s consommant des substances psychoactives (SPA, incluant alcool, tabac, cannabis et substances illégales). Ces milieux peinent à répondre aux besoins complexes de cette clientèle et l'absence d'accompagnement adap...

Les établissements d’hébergement et de soins de longue durée pour aîné(e)s accueillent de plus en plus fréquemment des résident(e)s consommant des substances psychoactives (SPA, incluant alcool, tabac, cannabis, ou substances illégales). Ces milieux peinent à répondre aux besoins complexes de cette clientèle, et l’absence d’accompagnement adapté ac...

Objectives: This study investigated the use of outpatient care, and sociodemographic and clinical characteristics of patients with substance-related disorders (SRD) to predict treatment dropout from specialized addiction treatment centers. The study also explored risks of adverse outcomes, frequent emergency department (ED) use (3+ visits/year), a...

Background This study identified patient profiles in terms of their quality of outpatient care use, associated sociodemographic and clinical characteristics, and adverse outcomes based on frequent emergency department (ED) use, hospitalization, and death from medical causes. Methods A cohort of 18,215 patients with substance-related disorders (SRD...

Background: Dedicated to seniors with loss of autonomy, long-term care and housing facilities (LTCH) are struggling to meet the specific needs of residents who use psychoactive substances. The lack of appropriate care aggravates the impacts of consumptions, associated comorbidities, and accentuates the loss of autonomy. By documenting the perspecti...

Residential and long-term care facilities (LTCFs) for the elderly are ill-equipped to deal with the increasing use of psychoactive substances (PAS) among their residents. There are currently no clear guidelines regarding practices or the organization of services to be adopted in this regard. The lack of adapted management has repercussions in terms...

Objective: This study identified patient clinical and sociodemographic characteristics, and, more originally, service use patterns as predictors of death from physical illness or accidental/intentional causes. Methods: A cohort of 19,015 patients with substance-related disorders (SRD) from 14 addiction treatment centers was investigated using Qu...

Few studies have assessed the overall impact of outpatient service use on acute care use, comparing patients with different types of substance-related disorders (SRD) and multimorbidity. This study aimed to identify sociodemographic and clinical characteristics and outpatient service use that predicted both frequent ED use (3+ visits/year) and hosp...

Objective: This study aimed to identify predictors of emergency department (ED) use for suicide ideation or suicide attempt compared with other reasons among 14,158 patients with substance-related disorders (SRD) in Quebec (Canada). Methods: Longitudinal data on clinical, sociodemographic, and service use variables for patients who used addictio...

Canada legalized nonmedical cannabis in October 2018, but significant variations in municipal regulations exist. This study explored the variations that exist and pondered their potential public health consequences. A comparative analysis was completed on the regulations and guidelines that addressed retailers' location and public consumption in th...

Young adults that drive after cannabis use (DACU) may not share all the same characteristics. This study aimed to identify typologies of Canadians who engage in DACU. About 910 cannabis users with a driver's license (17–35 years old) who have engaged in DACU completed an online questionnaire. Two‐step cluster analysis identified four subgroups, bas...

Background The harmful use of alcohol is one of the leading health risk factors for people’s health worldwide, but some populations, like people who experience homelessness, are more vulnerable to its detrimental effects. In the past decades, harm reduction interventions that target these complex issues has been developed. For example, wet services...

Introduction: Patients with substance-related disorders and mental disorders (MD) contribute substantially to emergency department (ED) overcrowding. Few studies have identified predictors of ED use integrating service use correlates, particularly among patients with cannabis-related disorders (CRD). This study compared predictors of low (1-2 visi...

Background: Profiles of individuals with cannabis-related disorders (CRD) in specialized addiction treatment centers serving high-need patients have not been identified. This longitudinal study developed a typology for 9,836 individuals with CRD attending Quebec (Canada) addiction treatment centers in 2012-2013. Methods: Data on sociodemographic, c...

Background This study measured emergency department (ED) use and hospitalization for medical reasons among patients with substance-related disorders (SRD), comparing four subgroups: cannabis-related disorders, drug-related disorders other than cannabis, alcohol-related disorders and polysubstance-related disorders, controlling for various clinical,...

Parution dans la revue Addiction(s) : recherches et pratiques (décembre 2021)

This study identifid the most prominent risk factors associated with driving after cannabis use (DACU). 1,126 Canadian drivers (17-35 years old) who have used cannabis in the past 12 months completed an online questionnaire about sociodemographic information, substance use habits, cannabis effect expectancies, driving behaviours and peers' behaviou...

Context Assessing temporal changes in the recorded diagnostic rates, incidence proportions, and health outcomes of substance-related disorders (SRD) can inform public health policymakers in reducing harms associated with alcohol and other drugs. Objective To report the annual and cumulative recorded diagnostic rates and incidence proportions of SR...

Few studies have examined predictors of recurrent high ED use. This study assessed predictors of recurrent high ED use over two and three consecutive years, compared with high one-year ED use. This five-year longitudinal study is based on a cohort of 3121 patients who visited one of six Quebec (Canada) ED at least three times in 2014-2015. Multinom...

Introduction Administrative health databases (AHD) are critical to guide health service management and can inform the whole spectrum of substance‐related disorders (SRD). This study estimates prevalence and mortality rates of SRD in administrative health databases. Methods The Quebec Integrated Chronic Disease Surveillance System consists of linke...

Persistent use of cannabis in persons with psychosis is associated with poor symptomatic and functional outcomes and increased healthcare costs. Face-to-face psychological interventions (e.g., Cognitive Behavioral Therapy- [CBT], Motivation Enhancement Therapy- [MET]) are widely used in treating problematic cannabis use. We aimed to comprehensively...

Aims: This study identified factors associated with frequency of emergency department (ED) use for medical reasons among patients with substance-related disorders (SRD) in Quebec (Canada) for 2014-15. Methods: Participants (n = 4731) were categorized as: 1) low (1 visit/year), 2) moderate (2 visits/year), and 3) high (3+ visits/year) ED users. I...

Les personnes avec des troubles mentaux (TM), incluant les troubles liés aux substances (TLS), utilisent plus fréquemment les services d'urgence que la population générale. Basée sur l'analyse de banques de données médico-administratives regroupant 98% de la population du Québec, cette étude permet de mieux cerner les besoins de services des patien...

Background: The prevalence of mood disorders was estimated at 5.4% according to the latest Canadian survey. It has been suggested to use administrative data and self-reported data to optimize the estimation for mental health care in the population. Using administrative data, algorithms (combination of codes from the International Classification of...

Previous research repeatedly observed associations between academic achievement and substance use during adolescence. However, the simple frequency of substance use was not differentiated from the emergence of substance use related problems, such as abuse and dependence. This study presents autoregressive cross-lagged models describing inter-relati...

Objectives: This study identified factors associated with frequency of emergency department (ED) use for mental health (MH) reasons in Quebec during 2015-2016. Methods: Participants (n = 115,066) were categorized as: 1) low (1 visit/year; 76%); 2) moderate (2 visits/year; 14%); and 3) high (3+ visits/year; 10%) ED users. Independent variables in...

This study investigated the contribution of engaging in structured and unstructured physical activity on girls’ and boys’ depressive symptoms. Secondary analyses were conducted using prospective-longitudinal data (n=1,516 children) of the Quebec Longitudinal Study of Child Development. Parents reported on their children’s participation in structure...

Background This descriptive study compared 2014–15 to 2005–06 data on the quality of mental health services (MHS) in relation to emergency room (ER) use to assess the impact of the 2005 Quebec MH reform regarding access, continuity and appropriateness of care for patients with mental illnesses (PMI). Methods Data emanated from the Quebec Integrate...

Rapport de l'INSPQ

Objectives This study investigated emergency department (ED) use, reasons for emergency visits, hospitalization rates, and duration of hospitalization in 2014-15 for a cohort of patients with mental disorders (MDs) including substance use disorders (SUDs), regarding sex, age and residential areas. Results were compared with data from patients witho...

Introduction Epidemiogical surveys in the general population can provide relevant information on substance use and substance-related disorders (SRD). However, because of time and resource constraints, this data is limited in its scope. Health administrative databanks consist of routinely collected data covering a large sample size, often representa...

Les troubles liés aux substances psychoactives (TLS) sont associés à de nombreux problèmes sociosanitaires requérant divers services adaptés. Dans le but de déterminer la prévalence des TLS et leurs impacts sur l’utilisation des services dans le système de santé québécois, le Système intégré de surveillance des maladies chroniques du Québec dévelop...

L’urgence joue un rôle de baromètre de la qualité du système de santé. Basée sur le Système intégré de surveillance des maladies chroniques du Québec (SISMACQ), une cohorte de patients avec troubles mentaux (TM) incluant les troubles liés aux substances psychoactives (TLS) est décrite quant à son utilisation de l’urgence, de l’hospitalisation, incl...

Purpose of review Over time, the sleep disturbances experienced by people with bipolar disorder (BD) can lead to a progressive accumulation of sleep debt with widespread adverse consequences on mental and physical health. This review looks at recent studies that have examined bipolar disorder in relation to sleep and cardiovascular dysfunctions. R...

This study examined factors associated with mental health services (MHS) use by individuals with mental disorders within a developmental perspective of adulthood. Bivariate and multivariate analyses were conducted separately for each developmental stage on independent variables using the Andersen’s behavioral health service model. For 18–29-year-ol...

Objective: To examine the clinical characteristics of adolescent girls consulting in a mood disorder clinic with a history of physical or sexual abuse. Method: A retrospective review was conducted of the charts of 55 adolescent girls consulting in a mood disorder clinic. An analysis grid was used to gather data on demographics, personal antecede...

This study assessed the characteristics of individuals with substance use disorders (ISUDs) according to their frequency of emergency department (ED) utilization, and examined which variables were associated with an increase in ED visits using Andersen's model. Data linkage of administrative databanks from three sources [addiction rehabilitation ce...

This study examined whether parental corporal punishment (CP) was associated with children's externalizing and prosocial behaviors 2 years later. The potential moderating effects of child temperament, maternal depression, and parenting skills were explored. Also, exploratory analyses of these associations were conducted according to the children's...

Introduction Chart review is a low-cost, but highly informative, method to describe symptoms, treatment, and risk factors associated with borderline personality disorder (BPD) and to adapt screening and intervention to clinical reality. Previous chart review studies report more aggressiveness/anger and psychotic features in youths with BPD. They sh...

Objectives This study aimed to: (1) identify clusters based on the diagnostic status of mental disorders among individuals with problematic substance use treated in an addiction rehabilitation center (ARC), and (2) characterize these clusters according to socio-demographic variables, neighborhood characteristics, and health service utilization. Me...

Objective: This paper presents a systematic review and meta-analysis of available evidence on remission rates for substance use disorders (SUDs), providing weighted mean estimates of SUD remission rates. The review also explores study-level characteristics that may explain variations in remission rates across studies. Methods: A comprehensive se...

Background This study aimed to 1) identify the characteristics of individuals with substance use disorders (SUDs) who make high use of services provided by general practitioners (GP) and psychiatrists while receiving services concurrently from an addiction rehabilitation center (ARC), and 2) to compare high service users to moderate and low service...

A recent article by Chaput and colleagues (1) provides evidence that if a relationship exists between lunar cycle and sleep duration and physical activity in children, its association is rather weak and less-than-meaningful. Using an international sample of 9- to 11-year olds (n = 5812), monitored by accelerometers, Chaput and his team found no rel...

Corporal punishment has long been valued as a disciplinary strategy. However, it is now legally prohibited in many countries, because of its potentially negative impacts (Durrant & Ensom, 2012). Yet, even though its use has declined over the last 15 years (Clément & Chamberland, 2014), each year in the United States, more than half of parents have...

Background: Mental health services (MHS) use is a complex behaviour that does not only concern individuals with current mental disorder. To date, few studies have examined age-related contextualisation of MHS use. Reasons for seeking help may vary according to development stages in adulthood. Aims: This study aimed to determine which predisposin...

Sleep-wake patterns are rarely examined in adolescents with borderline personality disorder (BPD) or bipolar disorder (BD). Within a developmental perspective, this study explores the sleep-wake cycle of adolescents aged 12-17 years with BPD or BD and healthy controls (HC) during periods with and without entrainment by school/work schedules. Eighte...

This retrospective chart review of 100 children and adolescents attending a mood disorder clinic aims to describe the demographic, clinical, and diagnostic characteristics of young outpatients with a history of physical or sexual abuse. Data were collected using a grid analysis. Youth with a history of abuse were compared to never abused patients....

To describe the clinical characteristics of depressed children and adolescents according to age groups and sex. A retrospective chart review study was conducted on 75 youths aged 6-17 years referred for depressive disorders to child psychiatry in 2002-2003. Descriptive statistics and tests of association were completed to compare boys aged 6-11 yea...

Contexte Le trouble de personnalité limite (TPL) représente 2 % de la population générale, 10 % des consultations externes en psychiatrie, 20 % des patients hospitalisés et près de 41 % des patients vus en urgence pour tentative de suicide. Aussi, 10 % complètent un suicide et 64–66 % ont une comorbidité avec une dépendance aux substances. De plus,...

Borderline personality disorder (BPD) represents 2% of the general population, 10% of outpatient psychiatry facilities, 20% of inpatients and nearly 41% of patients seen in Emergency Room for attempted suicide. Also, 10% complete suicide and 64-66% have comorbid substance dependence. In addition, several studies report sleep subjective complaints i...

Objectif : l’article vise a replacer dans le contexte clinique et psychopathologique les principaux resultats des etudes empiriques de l’estime de soi dans le trouble deficitaire de l’attention-hyperactivite (TDAH). Methode : analyse systematique de la litterature empirique et presentation des analyses intermediaires d’une etude en cours. Resultats...

Borderline Personality Disorder (BPD) is characterized by severe instability in mood, impulse control, relationships and sleep patterns, alongside with mild cognitive disturbances in some patients. Although research on adolescent BPD has developed over the last decade, little is known about circadian sleep-wake patterns in this population. Low comp...

ContextAlthough psychiatric research uses clear diagnostic criteria to describe bipolar disorders, therapists in clinical practice are often confronted with patients presenting a number of symptoms with different degrees of intensity and belonging to more than one diagnostic category. With respect to this actual clinical complexity, there is an inc...

The case of a bipolar 17-year-old girl who developed prolonged vivid hallucinations and a dissociative state involving self-destructive behaviour following the use of Salvia divinorum is presented. The herb has mostly short-term (10–15 min) hallucinogenic properties. Salvatorin A, the main active compound, is a highly selective agonist of the kappa...

The existence of bipolar disorder type I (BD-I) during adolescence is now clearly established whereas there are still some controversies on BD-II and BD-NOS diagnosis, mainly in Europe (O'Dowd in Br Med J 29, 2006). Little is known on the phenomenology and potential short-term prognosis factors of bipolar episodes in this age population. In particu...

Actigraphy has been used in clinical pediatric populations for many years, including attention deficit-hyperactivity disorder and mood disorders to characterize circadian rhythms of motor activity, and as an alternative evaluation of sleep patterns. We present a case of an adolescent presenting with borderline personality disorder (BPD) and substan...

The existence of bipolar disorder in adolescents is now clearly established. However, whether bipolarity exists in children is more controversial. We reviewed the literature on acute and prophylactic treatment of bipolar disorder in youths. The guidelines for the treatment of bipolar disorder in children and adolescents are generally similar to tho...

Actuellement, le diagnostic différentiel du trouble bipolaire (TB) et du trouble de personnalité limite (TPL) à l’adolescence s’avère difficile et complique le choix thérapeutique. Portant sur le TB et le TPL, ce mémoire fait le point sur la littérature scientifique adulte et adolescente, vérifie la faisabilité et présente les résultats d’une étude...