Seroprevalence of SARS-CoV-2 Antibodies Among Children in School and Day Care in Montreal, Canada

IMPORTANCE

Quebec prioritized in-person learning after the first wave of the COVID-19 pandemic, with school closures being implemented temporarily in selected schools or in hot-spot areas. Quebec's decision to keep most schools open was controversial, especially in Montreal, which was the epicenter of Canada's first and second waves; therefore, understanding the extent to which children were infected with SARS-CoV-2 provides important information for decisions about school closures.

OBJECTIVE

To estimate the seroprevalence of SARS-CoV-2 antibodies in children and teenagers in 4 neighborhoods of Montreal, Canada.

DESIGN, SETTING, AND PARTICIPANTS

This cohort study (the Enfants et COVID-19: Étude de séroprévalence [EnCORE] study) enrolled a convenience sample of children aged 2 to 17 years between October 22, 2020, and March 22, 2021, in Montreal, Canada.

EXPOSURES

Potential exposure to SARS-CoV-2.

MAIN OUTCOMES AND MEASURES

The main outcome was seroprevalence of SARS-CoV-2 antibodies, collected using dried blood spots (DBSs) and analyzed with a research-based enzyme-linked immunosorbent assay (ELISA). Parents also completed an online questionnaire that included questions on self-reported COVID-19 symptoms and tests, along with sociodemographic questions.

RESULTS

This study included 1632 participants who provided a DBS sample from 30 day cares, 22 primary schools, and 11 secondary schools. The mean (SD) age of the children who provided a DBS sample was 9.0 (4.4) years; 801 (49%) were female individuals, with 354 participants (22%) from day cares, 725 (44%) from primary schools, and 553 (34%) from secondary schools. Most parents had at least a bachelor's degree (1228 [75%]), and 210 (13%) self-identified as being a racial or ethnic minority. The mean seroprevalence was 5.8% (95% CI, 4.6%-7.0%) but increased over time from 3.2% (95% CI, 0.7%-5.8%) in October to November 2020 to 8.4% (95% CI, 4.4%-12.4%) in March to April 2021. Of the 95 children with positive SARS-CoV-2 antibody results, 78 (82%) were not tested or tested negative with reverse transcription-polymerase chain reaction (RT-PCR) testing, and all experienced mild (49 [52%]) or no clinical symptoms (46 [48%]). The children of parents who self-identified as belonging to a racial and ethnic minority group were more likely to be seropositive compared with children of White parents (adjusted seroprevalence ratio, 1.9; 95% CI, 1.1-2.6).

CONCLUSIONS AND RELEVANCE

These results provide a benchmark of the seroprevalence status in Canadian children. The findings suggest that there was more transmission occurring in children compared with what was being detected by RT-PCR, although children experienced few or mild symptoms. It will be important to continue monitoring the serological status of children, particularly in the context of new COVID-19 variants of concern and in the absence of mass vaccination campaigns targeting young children.

Seroprevalence of anti-SARS-CoV-2 antibodies among school and daycare children and personnel: protocol for a cohort study in Montreal, Canada

INTRODUCTION

Further evidence is needed to understand the contribution of schools and daycares for the spread of COVID-19 in the context of diverse transmission dynamics and continually evolving public health interventions. The Enfants et COVID-19: Étude de séroprévalence (EnCORE) study will estimate the seroprevalence and seroconversion of SARS-CoV-2 among school and daycare children and personnel. In addition, the study will examine associations between seroprevalence and sociodemographic characteristics and reported COVID-19 symptoms and tests, and investigates changes in health, lifestyle and well-being outcomes.

METHODS AND ANALYSIS

This study includes children and personnel from 62 schools and daycares in four neighbourhoods in Montreal, Canada. All children aged 2-17 years attending one of the participating schools or daycares and their parents are invited to participate, as well as a sample of personnel members. Participants respond to brief questionnaires and provide blood samples, collected via dried blood spot, at baseline (October 2020-March 2021) and follow-up (May-June 2021). Questionnaires include sociodemographic and household characteristics, reported COVID-19 symptoms and tests, potential COVID-19 risk factors and prevention efforts and health and lifestyle information. Logistic regression using generalised estimating equations will be used to estimate seroprevalence and seroconversion, accounting for school-level clustering.

ETHICS AND DISSEMINATION

This study was approved by the research ethics boards of the Université de Montréal (CERSES) and the Centre Hospitalier Universitaire Sainte-Justine. Results will contribute to our knowledge about SARS-CoV-2 transmission in schools and daycares and will be made available to study participants and their families, school and public health decision-makers and the research community.

Mindfulness-based Intervention for Female Adolescents with Chronic Pain: A Pilot Randomized Trial

OBJECTIVE

To test the feasibility of a randomized-controlled trial measuring the impact of an adapted mindfulness-based intervention (MBI) in female adolescents with chronic pain.

METHODS

This was a single center, single-blind, prospective, experimental, longitudinal trial conducted in a pediatric tertiary care center. Participants had a history of chronic pain during at least three months. They were randomized into an intervention group or a wait-list control group. Both groups successively followed an adapted eight-week MBI designed specifically for adolescents with chronic pain. Pre-determined criteria were established to assess the feasibility, validity and acceptability of the study model. Data evaluating changes in quality of life, depression, anxiety, pain perception, psychological distress and salivary cortisol were collected throughout the 4-month study period.

RESULTS

Nineteen female participants completed the study and had a mean age of 15.8 years (range 13.9 -17.8). Attrition rate was low (17%). Attendance to mindfulness sessions (84%) and compliance to study protocol (100%) were high. All participants reported a positive change in the way they coped with pain. No changes in quality of life, depression, anxiety, pain perception, and psychological distress were detected. Significant reductions in pre-and post-mindfulness session salivary cortisol levels were observed (p<0.001).

CONCLUSIONS

Mindfulness is a promising therapeutic approach for which limited data exist in adolescents with chronic pain. Our study indicates the feasibility of conducting such interventions in teenage girls. A large trial is needed to demonstrate the efficacy and bio-physiological impacts of MBIs in teenagers with chronic pain.

Tobacco Use Among Adolescents Entering Quebec Youth Protection Centers

BACKGROUND: Every year between 4,000 and 5,000 adolescents reside in Quebec Youth Protection Centers (YPCs). Many of these adolescents use tobacco products and other psychotropic substances that impact their present and future well-being.

OBJECTIVES: Document the prevalence of tobacco use among youth residing in YPCs and identify associated factors. Describe the measures taken to implement policies for smoke-free environments in YPCs and promote smoking cessation counseling for youth in care.

DESIGN/METHODS: Between July 2008 and May 2009, adolescents aged 14-17 living in six YPCs across Quebec were recruited on a volunteer basis to participate in a surveillance study on health risk behaviors. Data on socio-demographics, lifetime substance use and sexual risk behaviors, as well as certain health consequences related to these behaviors were obtained during structured, face-to-face interviews. An analysis of factors associated with daily tobacco use was carried out.

RESULTS: Data regarding behaviors reported during the year prior to admission were collected among 499 participants (boys: 59%; median age: boys: 16; girls: 15). Lifetime tobacco use was reported by 93% of girls and 91% of boys (median age at first cigarette was 12 years). During the year prior to admission, 15% of youth reported no tobacco use, and 20% smoked occasionally. Two thirds (65%) reported daily tobacco use, with 36% of girls and 43% of boys smoking 10 or more cigarettes a day. In univariate analysis, factors significantly (p&lt;0.05) associated with daily smoking were: school failure or dropping out; family history of problematic alcohol or drug use; precocious initiation of alcohol use before age 13; history of regular use of alcohol or cannabis; problematic drug use (measured by DEP-ADO scale); having 6 or more lifetime sexual partners. Following dissemination of these results, measures were taken to develop a smoke-free policy and implementation plan for YPCs. Health professionals were trained to do brief interventions with all youth smokers entering care. In 2015 the YPC presented a brief to the provincial parlimentary committee on the Tobacco Act to support adoption of smoke-free policies for all health establishments in Québec.

CONCLUSION: Daily tobacco use is very prevalent among adolescents entering YPCs and the majority report problematic use of other psychoac-tive substances. Youth entering care merit screening for tobacco and drug use so that appropriate counseling can be initiated. Promoting policies that encourage smoke-free environments in child protection centers for both youth and the professionals working with them may greatly improve the chances for youth to live tobacco-free.

Effectiveness of brief interventions as part of the Screening, Brief Intervention and Referral to Treatment (SBIRT) model for reducing the nonmedical use of psychoactive substances: a systematic review

BACKGROUND

The purpose of this systematic review is to assess the effectiveness of brief interventions (BIs) as part of the Screening, Brief Intervention, and Referral to Treatment (SBIRT) model for reducing the nonmedical use of psychoactive substances.

METHODS

Bibliographic databases (including MEDLINE, Embase, The Cochrane Library, CINAHL, and PsycINFO to April 2012) and gray literature sources were searched. We included randomized controlled trials that opportunistically screened adolescents or adults and then provided a one-to-one, verbal BI to those at risk of substance-use harm. Of interest was the nonmedical use of psychoactive substances (for example, drugs prohibited by international law), excluding alcohol, nicotine, and caffeine. Interventions comprised four or fewer sessions and were compared with no/delayed intervention or provision of information only. Studies were assessed for bias using the Cochrane risk of bias tool. Results were synthesized narratively. Evidence was interpreted according to the GRADE framework.

RESULTS

We identified 8,836 records. Of these, five studies met our inclusion criteria. Two studies compared BI with no BI, and three studies compared BI with information only. Studies varied in characteristics such as substances targeted, screening procedures, and BI administered. Outcomes were mostly reported by a single study, leading to limited or uncertain confidence in effect estimates.

CONCLUSIONS

Insufficient evidence exists as to whether BIs, as part of SBIRT, are effective or ineffective for reducing the use of, or harms associated with nonmedical use of, psychoactive substances when these interventions are administered to nontreatment-seeking, screen-detected populations. Updating this review with emerging evidence will be important.

TRIAL REGISTRATION

CRD42012002414.

Sexual health of adolescents in Quebec residential Youth Protection Centres

OBJECTIVES

To document risk behaviours and prevalence of chlamydia and gonorrhoea infections among adolescents aged 14 to 17 years entering care in Quebec Youth Protection Centres (YPC).

METHODS

From July 2008 to May 2009, adolescents residing in six YPCs completed a questionnaire during a face-to-face interview. Questions covered sexual and substance use behaviours prior to admission, as well as other health issues affecting respondents' mental and physical health. Urine samples were tested for Chlamydia trachomatis genital infection (CTGI) and Neisseria gonorrhoea genital infection (NGGI).

RESULTS

Among 578 participants aged 14 to 17 years, 89% had had consensual sexual relations. Sexual risk behaviours included early sexual initiation (66% at <14 years); multiple partners (median lifetime number: girls 5, boys 8); 50% or more of sexual relations under the influence of drugs or alcohol (girls 43%, boys 48%); group sex (girls 38%, boys 43%); and sex in exchange for money or other goods (girls 27%, boys 8%). Only a quarter of boys and girls used double protection (condom and a contraceptive method) during the most recent vaginal relation. A history of pregnancy was reported by 28% of girls. Prevalence of CTGI was 9.3% (CI: 5.5-14.5) among girls and 1.9% (CI: 0.6-4.4) among boys. Prevalence of NGGI gonorrhoea was 1.7% (CI: 0.3-4.8) among girls and 0% (CI: 0.0-1.4) among boys.In multivariate analyses, factors significantly associated with chlamydia infection among sexually active girls were: hospitalization for alcohol intoxication; and a history of suicidal ideation with plan.

CONCLUSION

Sexual risk behaviours are common among adolescents entering YPCs, resulting in high levels of chlamydia infection. Mental health issues such as substance misuse and serious depressive symptoms are associated with these high rates. A youth's stay in these facilities is an opportune time to screen not only for sexual risk behaviours but also for mental health problems; appropriate risk reduction education and referrals can then be provided as needed.

Effectiveness of brief interventions as part of the screening, brief intervention and referral to treatment (SBIRT) model for reducing the non-medical use of psychoactive substances: a systematic review protocol

BACKGROUND

There is a significant public health burden associated with substance use in Canada. The early detection and/or treatment of risky substance use has the potential to dramatically improve outcomes for those who experience harms from the non-medical use of psychoactive substances, particularly adolescents whose brains are still undergoing development. The Screening, Brief Intervention, and Referral to Treatment model is a comprehensive, integrated approach for the delivery of early intervention and treatment services for individuals experiencing substance use-related harms, as well as those who are at risk of experiencing such harm.

METHODS

This article describes the protocol for a systematic review of the effectiveness of brief interventions as part of the Screening, Brief Intervention, and Referral to Treatment model for reducing the non-medical use of psychoactive substances. Studies will be selected in which brief interventions target non-medical psychoactive substance use (excluding alcohol, nicotine, or caffeine) among those 12 years and older who are opportunistically screened and deemed at risk of harms related to psychoactive substance use. We will include one-on-one verbal interventions and exclude non-verbal brief interventions (for example, the provision of information such as a pamphlet or online interventions) and group interventions. Primary, secondary and adverse outcomes of interest are prespecified. Randomized controlled trials will be included; non-randomized controlled trials, controlled before-after studies and interrupted time series designs will be considered in the absence of randomized controlled trials. We will search several bibliographic databases (for example, MEDLINE, EMBASE, CINAHL, PsycINFO, CORK) and search sources for grey literature. We will meta-analyze studies where possible. We will conduct subgroup analyses, if possible, according to drug class and intervention setting.

DISCUSSION

This review will provide evidence on the effectiveness of brief interventions as part of the Screening, Brief Intervention, and Referral to Treatment protocol aimed at the non-medical use of psychoactive substances and may provide guidance as to where future research might be most beneficial.

Modeling initiation into drug injection among street youth

This study aimed at examining the predictors of initiation into drug injection among street youth using social cognitive theory framework. A prospective cohort study based on semi-annual interviews was carried out. Psychosocial determinants referred to avoidance of initiation. Other potential predictors were: sociodemographic characteristics, relationships with injectors, parent's substance misuse, drug use patterns, homelessness, survival sex, sexual abuse. Independent predictors were identified using Cox proportional hazards regression models. Among the 352 participants, high control beliefs about avoidance of initiation was protective while younger age, daily alcohol consumption, heroin use, cocaine use, and survival sex all increased risk of initiation. Preventive strategies targeting street youth should both enhance youth's control beliefs and actual control over their substance use and improve their life conditions.

The challenge of understanding mortality changes among street youth

According to a cohort study conducted in Montréal, Québec from 1995 to 2000, the mortality rate among street youth was 921/100,000 person-years. Several new community initiatives aiming to increase access to housing and to social and health services for the homeless were implemented in the city between 2000 and 2003. This study aims to update the mortality rate estimate for the period 2001-2006 and to examine factors that could explain a difference between rates, if any. A second cohort study was conducted between 2001 and 2006. The Cohort 2 mortality rate was computed and compared with the Cohort 1 rate. Several analyses were then carried out: (1) mortality rates in the general population were compared with street youth rates using standardized mortality ratios (SMR); (2) Cohorts 1 and 2 distributions of risk factors for mortality were examined, and their effects were assessed using multivariate proportional hazards regression analyses carried out on a combined Cohorts 1 and 2 dataset. Mortality rate among street youth decreased by 79% while it declined by only 19% in the general population; the SMR for Cohort 1 was higher than for Cohort 2 (11.6 versus 3.0). Multivariate proportional hazards regression analyses yielded estimates that were close to the model's estimates based on Cohort 1 data only, and participation in Cohort 1 was an independent predictor of mortality, with an adjusted hazard ratio of 9.0. The mortality decline cannot be completely explained by a similar decrease among the general population or by a difference in distribution of risk factors for mortality between the two cohorts. Field workers suggested that the decrease in heroin consumption they had observed in the streets might have contributed to the mortality decline. We then performed additional analyses which showed that even though the proportion of street youth currently using heroin decreased significantly between 1995 and 2005, the association between heroin use and mortality was not significant (adjusted hazard ratio of 0.9; 95% CI, 0.4 to 2.3). It seems that various factors could have contributed to the decline in mortality rates among street youth, one plausible factor being the implementation of new services for the homeless. This study underscores the importance of monitoring risky behaviors among vulnerable populations to ensure that morbidity and mortality data among these populations is correctly interpreted. Setting up a system to monitor the drug market could improve the quality of information collected.

Transition to injection drug use among street youth--a qualitative analysis

OBJECTIVES

To examine social contexts and processes influencing transition to drug injection among street youth.

METHODS

42 street youth participated in in-depth interviews. A typology of experiences was built founded on youth's street life and drug use trajectories. The transition to drug injection was examined through these experiences.

RESULTS

We identified five types of mutually exclusive experiences. The "downtowner's" experience is characterised by early street life and drug consumption trajectories, and a strong identification with the downtown milieu. These youth progress from one drug to another and, in a milieu where drug injection is omnipresent, this escalation culminates in transition to injection. The "tripper" street life and substance use trajectories begin later and are less intense. Most "tripper" youth are already chronic hallucinogens users when they arrive in downtown Montréal. Although they judge "junkies" severely, they show some ambivalence towards injection. The "on the go" experience is characterised by trajectories of drug use and street life that are intermingled, leading to a loss of control. These youth, who often have serious delinquent behaviours, come to downtown Montréal to party and consume drugs, mostly stimulants. Their drug use pattern and network make them at high risk of starting cocaine injection. The "hard-luck's" experience is characterised by a lack of identification with the downtown milieu. These youth who use drugs recreationally, end up in the streets accidentally, often because of unemployment. The "alcoholic' experience is related to alcohol misuse. These youth usually end up in the streets due to this dependence. Their street involvement is mostly an experience of solitude. The risk of transitioning to injection for both these types is low.

CONCLUSIONS

Some combinations of street life and drug use trajectories seem to contribute to injection among street youth. Some important factors interact and increase the risk of street youth transitioning to injection: poor personal assets; early rupture with primary social institutions; social integration into subcultures where both street life and "drug trips" are fashionable, drug preferences and the local drug market.

Recovery of a US endangered fish

BACKGROUND

More fish have been afforded US Endangered Species Act protection than any other vertebrate taxonomic group, and none has been designated as recovered. Shortnose sturgeon (Acipenser brevirostrum) occupy large rivers and estuaries along the Atlantic coast of North America, and the species has been protected by the US Endangered Species Act since its enactment.

METHODOLOGY/PRINCIPAL FINDINGS

Data on the shortnose sturgeon in the Hudson River (New York to Albany, NY, USA) were obtained from a 1970s population study, a population and fish distribution study we conducted in the late 1990s, and a fish monitoring program during the 1980s and 1990s. Population estimates indicate a late 1990s abundance of about 60,000 fish, dominated by adults. The Hudson River population has increased by more than 400% since the 1970s, appears healthy, and has attributes typical for a long-lived species. Our population estimates exceed the government and scientific population recovery criteria by more than 500%, we found a positive trend in population abundance, and key habitats have remained intact despite heavy human river use.

CONCLUSIONS/SIGNIFICANCE

Scientists and legislators have called for changes in the US Endangered Species Act, the Act is being debated in the US Congress, and the Act has been characterized as failing to recover species. Recovery of the Hudson River population of shortnose sturgeon suggests the combination of species and habitat protection with patience can yield successful species recovery, even near one of the world's largest human population centers.

Pourquoi commencer ? L’initiation à l’injection de drogues selon les jeunes de la rue

Dans le cadre du développement d’une campagne de prévention du passage à l’injection de drogues chez les jeunes de la rue, nous avons mené sept groupes de discussion auprès de 37 d’entre eux âgés de 15 à 23 ans. L’analyse, à la fois déductive et inductive, a permis d’identifier les dimensions reflétant le point de vue des jeunes à propos de l’injection de drogues et des éléments qui favorisent le passage à l’injection dans leur milieu. Les résultats montrent que l’injection est généralement désapprouvée par les jeunes de la rue. Plusieurs ont des réserves, celles-ci étant liées aux conséquences négatives de l’injection. Ce que les jeunes redoutent le plus, c’est de devenir « accro », un risque qu’ils associent davantage à l’injection qu’aux autres modes de consommation. Malgré la désapprobation générale, au contact des utilisateurs de drogues par injection (UDI), il se produit une sorte de désensibilisation qui entraîne vers l’injection les plus vulnérables, soit les plus jeunes, surtout ceux qui satisfont leur besoin de sensations fortes à travers la drogue et recherchent une valorisation dans le monde de la rue. Divers éléments d’ordre individuel et social agissent alors pour amener ces jeunes à s’initier à l’injection. Plusieurs de ces éléments peuvent être modifiables par des interventions préventives.

Adolescent care. Part 1: are family physicians caring for adolescents' mental health?

OBJECTIVE

To investigate how often family physicians see adolescents with mental health problems and how they manage these problems.

DESIGN

Mailed survey completed anonymously.

SETTING

Province of Quebec.

PARTICIPANTS

All 358 French-speaking family physicians who practise primarily in local community health centres (CLSCs), including physicians working in CLSC youth clinics, and 749 French-speaking practitioners randomly selected from private practice.

MAIN OUTCOME MEASURES

Frequency with which physicians saw adolescents with mental health problems, such as depression, suicidal thoughts, behavioural disorders, substance abuse, attempted suicide, or suicide, during the last year or since they started practice.

RESULTS

Response rate was 70%. Most physicians reported having seen adolescents with mental health problems during the last year. About 10% of practitioners not working in youth clinics reported seeing adolescents with these disorders at least weekly. Anxiety was the most frequently seen problem. A greater proportion of physicians working in youth clinics reported often seeing adolescents for all the mental health problems examined in this study. Between 8% and 33% of general practitioners not working in youth clinics said they had not seen any adolescents with depression, behavioural disorders, or substance abuse. More than 80% of physicians had seen adolescents who had attempted suicide, and close to 30% had had adolescent patients who committed suicide.

CONCLUSION

Family physicians play a role in adolescent mental health care. The prevalence of mental health problems seems higher among adolescents who attend youth clinics. Given the high prevalence of these problems during adolescence, we suggest on the basis of our results that screening for these disorders in primary care could be improved.

Adolescent care. Part 2: communication and referral practices of family physicians caring for adolescents with mental health problems

OBJECTIVE

To document with whom family physicians communicate when evaluating adolescents with mental health problems, to whom they refer these adolescents, and their knowledge and perceptions of the accessibility of mental health services in their communities.

DESIGN

Mailed survey completed anonymously.

SETTING

Province of Quebec.

PARTICIPANTS

All general practitioners who reported seeing at least 10 adolescents weekly (n = 255) among 707 physicians who participated in a larger survey on adolescent mental health care in general practice.

MAIN OUTCOME MEASURES

Whether family physicians communicated with people (such as parents, teachers, or school nurses) when evaluating adolescents with mental health problems. Number of adolescents referred to mental health services during the last year. Knowledge of mental health services in the community and perception of their accessibility.

RESULTS

When asked about the last 5 adolescents seen with symptoms of depression or suicidal thoughts, depending on type of practice, 9% to 19% of physicians reported routinely communicating with parents, and 22% to 32% reported not contacting parents. Between 16% and 43% of physicians referred 5 adolescents or fewer to mental health services during a 12-month period. Most practitioners reported being adequately informed about the mental health services available in their local community clinics. Few physicians knew about services offered by private-practice psychologists, child psychiatrists, or community groups. Respondents perceived mental health services in community clinics (CLSCs) as the most accessible and child psychiatrists as the least accessible services.

CONCLUSION

Few physicians routinely contact parents when evaluating adolescents with serious mental health problems. Collaboration between family physicians and mental health professionals could be improved. The few referrals made to mental health professionals might indicate barriers to mental health services that could mean many adolescents do not receive the care they need. The lack of access to mental health services, notably to child psychiatrists, reported by most respondents could explain why some physicians choose not to refer adolescents.

The health of street youth: a Canadian perspective

OBJECTIVE

To review epidemiologic studies of the health of street youth in industrialized countries, with a special focus on Canadian youth.

METHODS

We identified 52 peer-reviewed studies from searches of the MEDLINE database and bibliographies of published papers, for data on blood-borne and sexually transmitted infections, mental health problems, pregnancy, violence and mortality.

RESULTS

Rates of hepatitis B, hepatitis C, and HIV infection are much higher among street youth than among their non-street peers. Likewise, the prevalence of all mental health problems assessed in street youth is greater than that in non-street youth. Pregnancy is more frequent among street than household youth. Street youth also experience high levels of violence: a large proportion report physical abuse or assault. Finally, mortality is about 11 times the expected rate based on age and sex and is mainly caused by suicide and drug overdose.

CONCLUSION

Current research results are useful to orient public health interventions for street youth, but further epidemiologic research is needed. The need for Canadian data is particularly acute in specific areas including mental health, violence, pregnancy, and sexually transmitted infections such as, for example, herpes infection and syphilis.

HIV risk profile of male street youth involved in survival sex

OBJECTIVES

To compare HIV risk factors of male street youth involved in survival sex with those of their never involved peers and to describe the sexual activities of the involved youths.

METHODS

From 2001 to 2003, street youth aged 14-23 years were recruited from street youth agencies in Montreal, Canada. Information was collected on sociodemographic characteristics, substance use, and sexual behaviours. Involvement in survival sex was defined as having ever exchanged sex for money, gifts, drugs, shelter, or other needs. Logistic regression was used to identify HIV risk factors associated with involvement in survival sex.

RESULTS

Among the 542 male participants recruited, 27.7% reported involvement in survival sex. HIV risk factors independently associated with such involvement were injection drug using partners (modulated by length of homelessness), unprotected oral sex with male partners, steroid injection, history of sexual abuse, and drug injection. Among involved youths, 32.0% had only female clients, 41.3% only male clients, and 26.7% had clients of both sexes. Unprotected sexual activities were common with clients. However, even more risks were taken with non-commercial sexual partners.

CONCLUSIONS

Male street youth involved in survival sex are at higher risk for HIV than their non-involved peers not only because of their unprotected commercial sexual activities. They have multiple other HIV risks related to non-commercial sexual activities, drug injection, and sexual abuse. All these risks need to be addressed when providing sexual health interventions for this population.

Predictors of initiation into prostitution among female street youths

Prostitution among female street youths represents an important risk factor for several health problems. Little is known about the incidence and determinants of prostitution in this vulnerable population, and no data have been previously reported based on a longitudinal follow-up study. The objective of this study was to determine predictors of initiation into prostitution among female street youths. Female youths aged 14 to 25 years were enrolled in the Montreal Street Youth Cohort. They completed a baseline and at least one follow-up questionnaire between January 1995 and March 2000. Girls who reported never having engaged in prostitution at baseline were followed prospectively to estimate the incidence and predictors of prostitution. Of the 330 female street youths enrolled as of September 2000 in the cohort, 148 reported no history of involvement in prostitution at baseline and completed at least one follow-up questionnaire. Of these 148 girls, 33 became involved in prostitution over the course of the study (mean follow-up 2.4 years), resulting in an incidence rate of 11.1/100 person-years. Multivariate Cox regression analysis revealed having a female sex partner (adjusted hazard ratio [AHR] 3.8; 95% confidence interval [CI] 1.6-9.1) was an independent predictor of initiation into prostitution after controlling for having been on the street at age 15 years or younger (AHR 1.8, 95% CI 0.9-3.8), using acid or phencyclidine (PCP; AHR 2.0, 95% CI 0.9-4.6), using heroin (AHR 1.9, 95% CI 0.7-5.5), the use of drugs greater than twice per week (AHR 1.9, 95% CI 0.9-4.2), and injection drug use (AHR 0.8, 95% CI 0.3-2.4). The incidence of prostitution in female street youths was elevated. Having a female sex partner was a strong predictor of initiating involvement in prostitution.

Characteristics of adolescent street youth with a history of pregnancy

This study examines characteristics of adolescent street youth with histories of pregnancy and documents important factors that merit consideration when providing global sexual health care.

STUDY OBJECTIVE

To determine social and behavioral factors associated with a history of pregnancy among adolescent street youth.

DESIGN, SETTING, PARTICIPANTS

In a prospective cohort study, female adolescent street youth (14-19 years) ever pregnant (AEP) were compared with adolescents never pregnant (ANP) using data from baseline questionnaires.

RESULTS

Among the 225 participants, 41.8% were ever pregnant. Both groups were similar with respect to age (mean 17.8 years) and other socio-economic characteristics. However, AEP were more likely to have been kicked out of home (62.8% vs. 47.3%, P=0.022) and to have run away (78.7% vs. 64.9%, P=0.025) and were homeless younger (mean age: 13.9 vs. 14.7 years, P=0.011) and since a longer period (mean: 4.0 vs. 3.0 years, P=0.001). Both groups had problematic alcohol and drug use: 31.3% had a CAGE score >2; 72.2% had a DAST score >6. Almost half (44.0%) had ever injected drugs and AEP were younger at initiation into drug injection (15.2 years vs. 16.0 years, P=0.049). More AEP had experienced intra-familial or extra-familial sexual abuse (71.3% vs. 56.5%, P=0.024), and had had more than one abuser (71.6% vs. 50.0%, P=0.009). Among those abused by family members, abuse occurred at an earlier age for AEP (mean age: 7.4 vs. 8.9 years, P=0.090) and more AEP reported severe abuse: vaginal penetration (62.2% vs. 26.7%, P=0.004) and anal penetration (29.7% vs. 3.3%, P=0.005).

CONCLUSIONS

Histories of severe sexual abuse and early injection drug use are extremely frequent in ever pregnant street adolescents. These factors need to be addressed when planning global health care and sexual health education.

Mortality in a cohort of street youth in Montreal

CONTEXT

Many studies have shown a high prevalence of sexually transmitted diseases, human immunodeficiency virus (HIV) infection, viral hepatitis, drug dependence, and mental health problems among street youth. However, data on mortality among these youth are sparse.

OBJECTIVES

To estimate mortality rate among street youth in Montreal and to identify causes of death and factors increasing the risk of death.

DESIGN, SETTING, AND POPULATION

From January 1995 to September 2000, 1013 street youth 14 to 25 years of age were recruited in a prospective cohort with semi-annual follow-ups. Original study objectives were to determine the incidence and risk factors for HIV infection in that population; however, several participants died during the first months of follow-up, prompting investigators to add mortality to the study objectives. Mortality data were obtained from the coroner's office and the Institut de la Statistique du Québec.

MAIN OUTCOME MEASURES

Mortality rate among participants and factors increasing the risk of death.

RESULTS

Twenty-six youth died during follow-up for a mortality rate of 921 per 100 000 person-years (95% confidence interval [CI], 602-1350); this represented a standardized mortality ratio of 11.4. The observed causes of death were as follows: suicide (13), overdose (8), unintentional injury (2), fulminant hepatitis A (1), heart disease (1); 1 was unidentified. In multivariate Cox regression analyses, HIV infection (adjusted hazard ratio [AHR] = 5.6; 95% CI, 1.9-16.8), daily alcohol use in the last month (AHR = 3.2; 95% CI, 1.3-7.7), homelessness in the last 6 months (AHR = 3.0; 95% CI, 1.1-7.6), drug injection in the last 6 months (AHR = 2.7; 95% CI, 1.2-6.2), and male sex (AHR = 2.6; 95% CI, 0.9-7.7) were identified as independent predictors of mortality.

CONCLUSIONS

Current heavy substance use and homelessness were factors associated with death among street youth. HIV infection was also identified as an important predictor of mortality; however, its role remains to be clarified. These findings should be taken into account when developing interventions to prevent mortality among street youth.

Le « partage » des matériels d’injection chez les jeunes usagers de drogues injectables de Montréal

Cette étude visait à déterminer dans quels contextes les jeunes de la rue qui s’injectent des drogues « partagent » des matériels d’injection. Nous avons mené des entrevues en profondeur auprès de 24 jeunes (15 à 22 ans) recrutés avec l’aide d’organismes communautaires et par la technique de « snowballing ». Au moment de la première injection, ces jeunes sont peu préoccupés par les risques d’infection et s’inquiètent davantage du risque de développer une dépendance. Cependant, ceux qui persistent sont conscients des risques associés au « partage » de seringues et considèrent qu’il s’agit d’une pratique à éviter dans une ville où les programmes de prévention fournissent l’accès gratuit aux seringues. Ce n’est toutefois pas le cas pour les autres matériels d’injection. Les contextes de vulnérabilité par rapport au « partage » se constituent au carrefour de plusieurs facteurs qui sont à la fois d’ordre individuel et social. Certains moments critiques dans la trajectoire de vie des jeunes par rapport à la consommation de drogues et à la vie dans la rue ainsi qu’un degré élevé d’intimité entre partenaires d’injection les fragilisent pour ce qui est des pratiques non sécuritaires.

Interventions de prévention efficaces contre le VIH et l’hépatite C chez les jeunes utilisateurs de drogues par injection (UDI)

La dernière décennie a été marquée par une augmentation importante du nombre de pays rapportant que l’injection de drogues est présente dans leur population. Et, dans plusieurs pays, particulièrement dans ceux en voie de développement, la plupart des nouveaux injecteurs ont entre 15 et 24 ans. De nombreuses conséquences sociales et sanitaires sont associées à l’injection de drogues, les principales conséquences de type infectieux étant l’hépatite C et l’infection par le virus de l’immunodéficience humaine (VIH). Nous présenterons dans cet article les comportements d’injection et les comportements sexuels des injecteurs adolescents et jeunes adultes qui en font des personnes à risque pour ces deux infections. Nous y décrirons également des caractéristiques de ces jeunes injecteurs, qui sont liées à leur âge, dont il faut tenir compte dans l’élaboration de programmes de prévention : besoins liés au développement cognitif, physique et psychologique et aux contraintes d’ordre légal. Finalement, nous exposerons les résultats d’une vaste recherche que nous avons menée dans la littérature en vue de trouver des projets de prévention de l’infection par le VIH et de l’hépatite C qui ont répondu aux besoins spécifiques des jeunes injecteurs et qui ont fait l’objet d’une évaluation. Cette recherche a démontré qu’il existe très peu d’interventions satisfaisantes dans ce domaine. Selon nous, il est urgent que de telles interventions soient développées, évaluées et diffusées afin de contrer les épidémies de VIH et d’hépatite C qui sévissent chez les jeunes injecteurs.

HIV incidence among street youth in Montreal, Canada

OBJECTIVES

To estimate HIV incidence and identify predictors of seroconversion among Montreal street youth.

METHODS

From 1995 to 2000, street youth aged 14-25 years were recruited in a prospective cohort study. Interviews were conducted semiannually and included anti-HIV antibody testing. Among subjects who tested HIV negative at study entry and were interviewed at least twice, predictors of HIV seroconversion were identified using Cox regression. Variables considered as potential predictors were age, sex, injection drug use, being a male reporting male sexual partners, and survival sex.

RESULTS

Overall, 1013 youth were recruited in the study. HIV prevalence at study entry was 1.4% [95% confidence interval (CI) 0.8-2.4] and was stable over the 6 recruitment years. Among the 863 subjects selected for the incidence analysis, 66.7% were boys, 47.2% had ever injected drugs at study entry, and 25.7% had ever engaged in survival sex. The selected participants cumulated 2327 person-years of follow-up and 16 HIV seroconversions were observed, for an incidence rate of 0.69 per 100 person-years (95% CI 0.39-1.11). In univariate analysis, injection drug use [hazard ratio (HR), 7.0] and involvement in survival sex (HR, 4.0) were associated with HIV incidence. In the multivariate analysis, only injection drug use was retained.

CONCLUSIONS

Among Montreal street youth, injection drug use was the strongest predictor of HIV seroconversion. Prevention of initiation into injection drug use must become a public health priority.

Drug injection among street youths in Montreal: predictors of initiation

In North America, street youths are generally considered at very high risk of injection drug use. To estimate the incidence rate of injection drug use in this population and to identify predictors of injection drug use, we conducted the present analysis. Among participants to a cohort study initiated in January 1995, we selected subjects who had never injected at study entry and had completed at least one follow-up questionnaire. Predictors of initiation were identified using Cox proportional hazard regression models. Among the 415 never injectors (mean age at entry 19.5 years), 74 had initiated injection by January 2000 (incidence rate 8.2 per 100 person-years). Independent predictors of initiation were recent episode of homelessness; age younger than 18 years; being tattooed; recently using hallucinogens, heroin, and cocaine/crack/freebase; having a friend who injects drugs; and having ever experienced extrafamilial sexual abuse. This study showed that injection drug use is frequent among street youths, but prevention appears possible.

HIV risk profile and prostitution among female street youths

The objective of this study was to compare human immunodeficiency virus (HIV) risk factors among female street youths involved in prostitution and those with no history of prostitution. Youths aged 14 to 25 years were recruited into the Montreal Street Youth Cohort. Semiannually, youths completed an interviewer-administered questionnaire. Statistical analyses comparing characteristics and HIV risk factors for girls involved in prostitution and those never involved were carried out using parametric and nonparametric methods. Of the girls, 88 (27%) reported involvement in prostitution, and 177 girls reported no history of prostitution at the baseline interview. Girls involved in prostitution were two times and five times more likely to have reported bingeing on alcohol and on drugs, respectively. A history of injection drug use was four times more likely to have been reported by girls involved in prostitution. Further, these girls were 2.5 times more likely to have reported injected cocaine as their drug of choice. Girls involved in prostitution were younger the first time they had consensual sex and were twice as likely to have reported anal sex. Consistent condom use for anal, vaginal, and oral sex was low for all girls. Girls involved in prostitution reported more risky sexual partners. In conclusion, girls involved in prostitution may be at increased risk of HIV infection due to their injection drug use and risky sexual behaviors. Unique intervention strategies are necessary for reducing HIV infection among female street youths involved in prostitution.

Drug injection among street youth: the first time

AIMS

To describe the circumstances of the first drug injection among street youth.

DESIGN

A cohort study conducted in 1995-2000.

PARTICIPANTS

Subjects aged 14-25 years old were recruited in all major Montreal organizations offering free services to street youth.

MEASUREMENT

Subjects who reported having ever injected drugs completed questions on the circumstances of their first injection (calendar time, location, type of relationship with the initiator, presence of others, drug first injected, source of needle and use of clean needle and other injection materials). Questions on characteristics of the initiator and prior use of the first injected drug were added during the course of the study.

FINDINGS

Of 980 participants, 530 (54%) had ever injected drugs. Questionnaires were completed by 505 subjects, including 77 who also answered the additional questions. The mean age at first injection was 17.7 years. First injection occurred mainly in public places (41%). It was performed by a close friend (41%), the youth himself/herself (27%), an acquaintance (15%), a lover (10%) or another person (7%). Overall, 84% of youth first injected with a clean needle; only 62% used clean drug preparation equipment. The first drug injected was generally cocaine (47%) or heroin (41%). Two-thirds (53/77) had used the drug of first injection previously; however, the majority was not dependent upon it.

CONCLUSIONS

Most street youth used clean needles at first injection, but use of other clean injection materials was less frequent. Factors other than dependence appear to play a significant role in initiation into injection.

Unsafe sex, substance abuse, and domestic violence: how do recently trained obstetricians-gynecologists fare at lifestyle risk assessment and counseling on STD prevention?

BACKGROUND

Unsafe sexual practices, substance abuse, and domestic violence impact women's health. This study examined whether lifestyle risk assessment during a general medical examination and counseling about sexually transmitted disease during consultations for adolescent contraception and treatment of a sexually transmitted disease were more frequently done by recently trained obstetricians-gynecologists compared to those of obstetrician-gynecologists licensed before 1990. It also documented obstetrician-gynecologists' evaluations of their medical training in that area.

METHODS

A pretested anonymous mail survey was conducted in 1995 with all 241 obstetrician-gynecologists practicing in Quebec, Canada; 66% responded (N = 158).

RESULTS

Compared to less recently trained obstetrician-gynecologists, recently trained obstetrician-gynecologists reported routinely assessing tobacco use (77 vs 51%, P = 0.01), alcohol use (50 vs 23%, P = 0.004), and illicit drug use (33 vs 17%, P = 0.05) more frequently during a patient's general medical evaluation. However, they did not assess condom use (50%), number of sexual partners, sexual partners' sexually transmitted disease risk (30%), or experiences of sexual abuse or domestic violence (3%) more frequently than less recently trained obstetrician-gynecologists. They were also not more likely to counsel teenagers about sexually transmitted disease prevention during a contraceptive consultation (30-60%) or to discuss human immunodeficiency virus infection (29%) and hepatitis B immunization (13%) during a sexually transmitted disease consultation.

CONCLUSION

Although evaluation of substance use was better among recently trained OB-Gyn physicians, little or no improvement has been noted regarding STD prevention or the evaluation of sexual abuse or domestic violence, all important lifestyle risks that directly affect women's health and well-being.

Risk behaviours and prevalence of Chlamydia trachomatis and Neisseria gonorrhoeae genital infections among Montreal street youth

We estimated the prevalence of Chlamydia trachomatis and Neisseria gonorrhoeae genital tract infections among 302 Montreal street youth (223 boys) and identified associated risk factors. Study participants, 14-25 years old (average 20.9 years), meeting specific criteria for homelessness, were recruited in street youth agencies. Participation included a structured interview and provision of a urine specimen. Among sexually active youth, (n = 300) 30.0% had more than five heterosexual partners and 13.0% had at least one homosexual partner (last year), 10.7% had received money in exchange for sex (last six months) and 47.0% reported sexual relations resulting in pregnancy (lifetime). Among all youths, 82.1% had used at least one type of illicit drug, and 30.1% injected drugs at least once (last six months). The prevalence of C. trachomatis infection was 6.6% (95% CI 4.1-10.0%). Prevalence did not vary significantly by sex, age or any other variable, except history of pregnancy (10.4% among youth with history of pregnancy vs 3.6% among others, P = 0.02). No cases of N. gonorrhoeae infection were found.

Automated homogeneous immunoassay analysis of cotinine in urine

A study was conducted to evaluate the performance comparison of a homogeneous enzyme immunoassay (EIA) designed to detect cotinine in urine and carbon monoxide (CO) breath measurements to determine smoking status. The clinical comparison was done using urine and breath specimens from 218 volunteers. Urine samples were analyzed by immunoassay and confirmed by gas chromatography-mass spectrometry (GC-MS). Breath carbon monoxide was determined by a commercial analyzer. Using cutoffs of 10 ppm for CO and 500 ng/mL for urinary cotinine, the relative sensitivity/specificity was 93.6%/74.0%. The positive predictive value was 86.8%, and the negative predictive value was 86.5%. However, comparison of the EIA to GC-MS showed a sensitivity/specificity of 96.2%/98.4% and a positive predictive value of 99.3%. The EIA was also evaluated non-clinically for precision, stability, recovery, and interferences. In addition, the non-clinical evaluation demonstrated coefficients of variation from 0.37 to 1.09% across cotinine concentrations ranging from 0 to 5000 ng/mL. The assay was found to be highly specific for cotinine and cross-reacted to a limited degree with 3-hydroxycotinine. Finally, multiple freeze-thaw cycles of urines containing cotinine showed no degradation of the drug in the specimen when tested in the EIA. Thus, the EIA tested is a rapid, lab-based test that can reliably determine cotinine levels and their relation to smoking status.

Seroprevalence and risk factors for hepatitis A among Montreal street youth

OBJECTIVE

To estimate the prevalence of hepatitis A virus (HAV) antibodies among Montreal street youth.

METHOD

Anti-HAV antibody testing was performed on blood samples from a hepatitis B and C study conducted among street youth in 1995-96.

RESULTS

Among the 427 youth aged 14 to 25 years, prevalence of HAV antibodies was 4.7% (95% confidence interval [CI]: 2.9%-7.2%). A multivariate logistic regression analysis showed that birth in a country with a high anti-HAV prevalence (Adjusted odds ratio [AOR]: 200.7; 95% CI: 38.1-1058.4), having had sexual partner(s) with history of unspecified hepatitis (AOR: 13.8; 95% CI: 4.2-45.2), and insertive anal penetration (AOR: 5.1; 95% CI: 1.6-16.7) were independently associated with infection.

CONCLUSION

Based on the relatively low HAV prevalence, the high prevalence of risk factors for infection, and the substantial hepatitis B and C prevalence, vaccination against hepatitis A is now actively promoted among Montreal street youth.

[Evaluation of a program to promote hepatitis B vaccination among adolescents in a school environment of Central Montreal]

OBJECTIVE

We developed a hepatitis B vaccination promotion project aimed at Montreal-area adolescents. A student leaflet, teacher's guide and classroom poster were developed. Our objectives were to have 25% of teachers give a course on hepatitis B and 25% of students begin vaccination against hepatitis B.

METHOD

The promotional campaign was aimed at 100,000 students in 225 public and private secondary schools. The evaluation was carried out six months after the beginning of the campaign. Data were collected through self-administered questionnaires to students (n = 206), teachers (n = 128) and school nurses (n = 30).

RESULTS

Two thirds of teachers used the material and 45% gave a course on the subject. The teachers who gave the course felt knowledgeable about teaching the subject and felt that the subject was important. Six months after the beginning of the campaign, 38% of secondary students had received at least one dose of vaccine.

CONCLUSION

The promotional material was appreciated by both students and teachers and used during secondary school classes. Teachers, when given appropriate tools and supported by school nurses, are highly motivated to pass on preventive heath messages to their students.

Risk factors for hepatitis C virus infection among street youths

BACKGROUND

The relative contributions to risk of hepatitis C virus (HCV) infection resulting from unsafe sexual behaviours and exposures to blood (e.g., tattooing, body piercing and injection drug use) among youths at risk are not well known. We interviewed street youths about risk factors for HCV infection and documented their HCV antibody status.

METHODS

From December 1995 to September 1996 we recruited 437 youths aged 14 to 25 years who met specific criteria for itinerancy. Data on sociodemographic characteristics and lifetime risk factors were obtained during a structured interview, and a venous blood sample was taken for HCV antibody testing.

RESULTS

Many of the subjects reported behaviours that put them at risk for blood-borne diseases: 45.8% had injected drugs, 56.5% had at least 1 tattoo, and 78.3% had body piercing. The overall prevalence of HCV infection was 12.6% (95% confidence interval [CI] 9.7%-15.9%). In a multivariate logistic regression analysis, injecting drugs (adjusted odds ratio [OR] 28.4 [95% CI 6.6-121.4]), being over 18 years of age (adjusted OR 3.3 [95% CI 1.6-7.0]) and using crack cocaine (adjusted OR 2.3 [95% CI 1.0-5.3]) were independent risk factors for HCV infection. Having more than 1 tattoo (adjusted OR 1.8 [95% CI 0.95-3.6]) was marginally associated with HCV infection, and body piercing was not.

INTERPRETATION

Drug injection was the factor most strongly associated with HCV infection among street youths. Given that injection drug users are the driving force of the HCV infection epidemic in Canada, increased intervention efforts to prevent initiation of drug injection are urgently needed to curb the epidemic.

Lifestyle health risk assessment. Do recently trained family physicians do it better?

OBJECTIVE

To determine whether recently trained family physicians were more likely to routinely assess lifestyle health risks during general medical evaluations. To document physicians' perceptions of the difficulties of lifestyle risk assessment, of medical training in that area, and of how often they saw patients with lifestyle health risks.

DESIGN

Anonymous mailed survey conducted in 1995.

SETTING

Family practices in the province of Quebec.

PARTICIPANTS

Stratified random sample of 805 active family physicians of 1111 surveyed; 25 were ineligible or could not be located, and 281 did not respond (74.1% response rate).

MAIN OUTCOME MEASURES

Proportion of physicians graduating before and after 1989 who reported routinely (with 90% or more of their patients) assessing their adult and adolescent patients during general medical evaluations for substance use, sexual risk behaviours, and history of family violence and sexual abuse.

RESULTS

Except for asking about drug use, recently trained family physicians did not report better assessment of lifestyle health risks during general medical examinations than family physicians who graduated more than 10 years ago did. In both groups, routine assessment averaged 82% for tobacco use, 68% for alcohol consumption, and 20% to 40% for sexual risk behaviours. Screening for family violence and sexual abuse was rare, but more frequently reported by older women physicians. Only 20% to 40% of recent graduates rated their medical training adequate for evaluating illicit drug use, family violence, and sexual abuse.

CONCLUSION

Recently trained family physicians do not assess most lifestyle risk factors any better than their more experienced colleagues.

Prevalence of HIV infection and risk behaviours among Montreal street youth

We aim to estimate HIV prevalence and associated risk factors among street youth in Montreal, Canada. We conducted a one-year cross-sectional anonymous study in 1995. We recruited youth aged 13-25 years meeting specific criteria for itinerancy through the 20 major Montreal street youth agencies. Participation included a structured interview and provision of an oral specimen for HIV testing. Among the 909 subjects studied, 99.3% had been sexually active, 25.9% had exchanged sex for money, gifts, drugs, a place to sleep, or other things; 31.8% reported anal sex; and 36.4% reported having ever injected drugs. Overall, HIV prevalence was 1.9% (1.1% in girls and 2.2% in boys). Multivariate logistic regression showed that being over 20 years of age (adjusted odds ratio (AOR) 7.09), having injected drugs (AOR 4.48), having engaged in prostitution (AOR 3.32), and being born outside Canada (AOR 4.41) were all independently associated with HIV infection.

Hepatitis B virus infection among street youths in Montreal

BACKGROUND

Street youths are at high risk for many health problems, including sexually transmitted diseases and bloodborne infections. The authors conducted a cross-sectional anonymous study from December 1995 to September 1996 involving street youths in Montreal to estimate the prevalence of risk behaviours for hepatitis B virus (HBV) infection and of markers of past and present HBV infection.

METHODS

Participants were 437 youths aged 14 to 25 meeting specific criteria for itinerancy who were recruited in collaboration with the 20 major street youth agencies in Montreal. Sociodemographic and lifetime risk factor data were obtained during a structured interview, and a blood sample was taken to test for HBV markers (hepatitis B surface antigen and antibodies to the hepatitis B core antigen). Univariate analyses and multivariate logistic regressions were conducted.

RESULTS

The mean age of the subjects was 19.5 years; 69.3% (303/437) were males. Many subjects had high-risk behaviours: 45.8% (200/437) had injected drugs, 24.5% (107/436) had engaged in prostitution, and 8.7% (38/437) reported having a sexual partner with a history of unspecified hepatitis. The prevalence rate for one or both HBV markers was 9.2% (40/434) (95% confidence interval [CI] 6.7%-12.3%). Multivariate logistic regression analysis showed that being over 18 years of age (adjusted odds ratio [OR] 4.5, 95% CI 1.8-11.7), having injected drugs (adjusted OR 3.5, 95% CI 1.5-8.3) and having had a sexual partner who had unspecified hepatitis (adjusted OR 3.2, 95% CI 1.3-7.5) were all associated with HBV infection.

INTERPRETATION

Street youths are at high risk for HBV infection. Early and complete HBV vaccination among this vulnerable population is urgently needed.

Do physicians assess lifestyle health risks during general medical examinations? A survey of general practitioners and obstetrician-gynecologists in Quebec

BACKGROUND

In Canada several guidelines have been published for the screening of lifestyle health risks during general medical examinations. The authors sought to examine the extent to which such screening practices have been integrated into medical practice, to measure physicians' perceived level of difficulty in assessing these risks and to document physicians' evaluation of their formal medical training in lifestyle risk assessment.

METHODS

An anonymous mail survey was conducted in 1995 in Quebec with a stratified random sample of 1086 general practitioners (GPs) and with all 241 obstetrician-gynecologists (Ob-Gyns). The authors evaluated the proportion of physicians who reported routine assessment (with 90% or more of their patients) of substance use, family violence and sexual history during general medical examinations of adult and adolescent patients; the proportion of those who find inquiring about these issues difficult; and the proportion of those who evaluated their medical training in lifestyle risk assessment as adequate or excellent.

RESULTS

The overall response rate was 72.6%. Among adult patients, 82.2% of the GPs reported routinely assessing tobacco use, 67.2% alcohol consumption, 34.2% illicit drug use and 3.2% family violence; the corresponding proportions for assessment among adolescent patients were 77.1%, 61.8%, 52.9% and 5.6%. Comparatively fewer Ob-Gyns reported routinely assessing these issues (56.1%, 28.6%, 20.4% and 1.3% respectively among adults and 62.7%, 35.2%, 26.8% and 2.8% respectively among adolescents). In the area of sexual history, condom use was routinely assessed by more Ob-Gyns than GPs (47.0% v. 28.2%); however, the proportion of Ob-Gyns and GPs was equally low for assessing number of partners (24.8% and 23.1%), sexual orientation (18.8% and 16.9%) and STD risk (26.2% and 21.2%). The vast majority of GPs and Ob-Gyns reported finding it difficult to assess family violence (86.5% and 93.0%) and sexual abuse (92.7% and 92.4% respectively). Over 80% of the physicians felt that they had had adequate or excellent medical training in assessing risk behaviours for heart disease and STD risk. The proportion who felt this way about their training in screening for illicit drug use, family violence and sexual abuse ranged between 12.7% and 31.6%.

INTERPRETATION

Although morbidity and mortality associated with smoking, alcohol consumption, illicit drug use, unsafe sexual practices, family violence and sexual abuse have been well documented, routine screening for these risk factors during general medical examinations has yet to be integrated into medical practice.

Sexual health risk assessment and counseling in primary care: how involved are general practitioners and obstetrician-gynecologists?

OBJECTIVES

This study examined physicians' evaluation of sexual health risks during a general medical examination and sexually transmitted disease (STD) counseling during consultations for adolescent contraception and treatment of an STD.

METHODS

An anonymous mail survey was conducted in 1995 with a stratified random sample of 1086 general practitioners and all 241 obstetrician-gynecologists practicing in Quebec, Canada.

RESULTS

Fewer than half of the respondents reported routinely inquiring about condom use and number of sexual partners during a general medical examination. Female general practitioners engaged in more sexual health risk assessment and counseling than male general practitioners.

CONCLUSIONS

This study suggests a low level of involvement in STD prevention by generalists and obstetrician-gynecologists.