Search PubMed⌕ Search

Biomedical subjects

Edward M Adlaf

Publications and source records attributed to Edward M Adlaf.

At least 19 recordsLinked to original sources
PubMed2006

The relationship between sedentary activities and physical inactivity among adolescents: results from the Canadian Community Health Survey.

PURPOSE: To evaluate the relationships between the time spent on sedentary activities (computer usage, video game playing, television viewing, and reading) and physical inactivity in a sample of youth (aged 12-19 years) from the 2000-2001 Canadian Community Health Survey. METHODS: The study sample included 7982 youth (4034 males, 3948 females) across Canada (mean age: 15.61 years, SD: 2.23 years). Weekly time spent on computers, video games, television, and reading during leisure-time was obtained through self-reported questionnaires. Physical inactivity was determined by respondents' daily energy expenditure assessed through a physical activity questionnaire. Multivariate logistic regression analysis was conducted to examine the relationship between sedentary activities and physical inactivity respectively by gender. Sociodemographic variables, health status, and overweight status were controlled in the analysis. RESULTS: A substantial proportion of Canadian youth was inactive: 50.3% of males and 67.8% of females. Controlling for sociodemographic variables, health status, and body mass index, television viewing was significantly associated with physical inactivity for both males and females regardless of their overweight status. However, computer usage was associated with physical activity among males, and reading was associated with physical activity among females. CONCLUSIONS: There is a complex inter-relationship between sedentary behaviors and physical inactivity, highlighting the need for targeted interventions addressing patterns of sedentary behavior engagement. Reducing time spent on television viewing may be one plausible strategy within such interventions in reducing physical inactivity among youth.

Adolescent↗
PubMed2006

The validity of the certification of manner of death by Ontario coroners.

PURPOSE: The aim of the study is to examine the validity of manner of death (MOD) certification of unnatural adult deaths by Ontario coroners. METHODS: A census of 306 active coroners practicing in Ontario was performed, with data collection occurring in 2002. Mailed self-administered questionnaires contained 14 fictitious clinicopathologic scenarios and questions regarding demographic information of the coroner. Crude and adjusted odds ratios of correct MOD certification were calculated by using responses of two deputy chief coroners as the gold standard. RESULTS: Nearly 74% of coroners responded to the survey. Deaths from hanging, drowning, and carbon monoxide had better odds of being certified correctly; whereas deaths from heroin, over-the-counter medication, and injuries from a descent had decreased odds of being certified correctly. Scenarios including a prior suicide attempt or a note had greater odds of correct MOD certification than those with only depression. Accidental deaths were underreported when injury resulted in a "natural" lethal complication and when there was a delay between injury and death. CONCLUSIONS: In detailing which deaths are likely to be misclassified and how they may be misclassified, this study will allow future research to more accurately assess suicidal and accidental deaths.

Cause of Death↗
PubMed2006

A provincial study of opportunities for school-based physical activity in secondary schools.

PURPOSE: Adolescents spend considerable time at school and thus it is important to understand their opportunities for school-based physical activity. This study surveyed Ontario secondary schools to identify the range of structured opportunities and their engagement by students. METHODS: A questionnaire was mailed to key informants in 600 randomly selected secondary schools in Ontario, for which 474 respondents (79%) returned completed questionnaires. RESULTS: Curriculum-based physical education (PE) classes in grade nine were reported to be offered in all schools and these classes in grades 10, 11 and 12 were offered in almost all schools. Student enrollment in PE decreased from grades 9 to 12 (97.9%, 49.6%, 43.3% and 35.9%, respectively). Respondents reported that funding, timetable, facilities and resources made it somewhat difficult to implement the health and physical education curriculum in their schools. About two-thirds (65.5%) of the schools had an intramural program and 15.0% of students participated in it, whereas 97.2% of the schools had an inter-school sports program and 25.0% of students participated in it. Supervision issues made it difficult to provide intramural programs and funding made it difficult to provide inter-school sports programs. CONCLUSIONS: Although provision of physical activity opportunities in Ontario appears satisfactory, actual engagement by students is low. The results suggest that strategies to increase student participation in PE, intramural programs, and inter-school sports programs need further consideration.

Adolescent↗
PubMed2005

Relationship of vigorous physical activity to psychologic distress among adolescents.

This article examines the relationship between vigorous physical activity and psychologic distress (by using the General Health Questionnaire-12) among a sample of 2,104 adolescents. Multiple regression analysis revealed a differential relationship between physical activity and dimensions of the General Health Questionnaire-12. Specifically, vigorous physical activity was related significantly to problems with social functioning but not to depression or anxiety.

Adolescent↗
PubMed2005

Part-time work and adolescent heavy episodic drinking: the influence of family and community context.

OBJECTIVE: Previous studies on part-time work and alcohol use suggest that teenagers who work longer hours drink more heavily. The purpose of this study was to investigate whether family- and community-level factors moderate the relationship between part-time work hours and heavy episodic drinking. METHOD: Data were drawn from the Canadian Community Health Survey, a cross-sectional study of a nationally representative sample of Canadians. The survey included 8,080 respondents 15-19 years of age who reported work hours and frequency of heavy episodic drinking over the past 12 months. These respondents were located in 136 counties or municipalities across Canada. RESULTS: On average, work hours were positively associated with the frequency of heavy drinking by teenagers in the past 12 months. At the community level, the proportion of teenagers in each community drinking any alcohol was independently and positively associated with respondents' frequency of heavy drinking. In terms of moderating effects, we found that the work hours-drinking association was weaker among youth from low socioeconomic status families. Examination of community-level factors indicated that longer work hours were more strongly associated with heavy episodic drinking in communities with high rates of teen alcohol abstinence. CONCLUSIONS: Although the cross-sectional data prohibit any firm conclusions on how family and community factors influence the work-alcohol use relationship, these data suggest that interventions to reduce heavy episodic drinking among teens should address the broader environmental as well as the individual determinants.

Adolescent↗
PubMed2004

Alcohol consumption and problems among road rage victims and perpetrators.

OBJECTIVE: Road rage has generated public concern; however, data on the causes of this behavior have not been available. We examine the alcohol consumption correlates of road rage victimization and perpetration based on a population survey of adults. METHOD: Data are based on the 2001-2002 Centre for Addiction and Mental Health Monitor, a repeated cross-sectional telephone survey of Ontario adults aged 18 and older (N = 2,610). Logistic regression analyses were performed with drinking measures (Alcohol Use Disorders Identification Test [AUDIT] consumption, dependence and problems) and demographic factors as independent variables. RESULTS: In the past year, 44.4% of respondents reported that someone shouted, cursed or made rude gestures at them, 6.0% were threatened with damage to their vehicle or personal injury, and 5.2% had someone attempt to or actually damage their vehicle or hurt them. Over the same period, 32% admitted shouting, etc., at someone, 1.7% threatened someone, and 1.0% attempted to or actually did damage someone's vehicle or hurt someone. Univariate analyses revealed several significant relationships between road rage and alcohol measures. Multivariate analyses revealed that the AUDIT alcohol problems measure was most consistently associated with measures of road rage victimization and perpetration, including reporting attempting or actually hurting someone or attempting or actually damaging his or her vehicle. CONCLUSIONS: These data indicate there is a significant relationship between alcohol problems, as measured by the AUDIT, and road victimization and perpetration. Further work must be undertaken to identify the mechanisms involved.

Accidents, Traffic↗
PubMed2003

Drinking, cannabis use and driving among Ontario students.

Little is known about the risk of injury among adolescents who drive after the use of alcohol or cannabis or ride in cars driven by drunk drivers. We examined data from self-administered interviews with 1846 students in grades 7 to 13 who participated in the 2001 Ontario Student Drug Use Survey about their experiences related to alcohol, cannabis and driving during the 12 months preceding the survey. In all, 31.9% of the students reported being a passenger in a car driven by a drunk driver; of the students in grades 10 to 13 who had a driver's licence, 15.1% reported driving within an hour after consuming 2 or more drinks, and 19.7% reported driving within an hour after using cannabis. Our study shows that a sizeable proportion of adolescents are exposed to alcohol- and drug-related driving risks.

Adolescent↗
PubMed2003

Interest in self-help materials among a general population sample of smokers.

Previous studies have shown that self-help materials can be effective in helping people quit smoking. However, it is not known what proportion of smokers in the general population are interested in this method of cessation. A representative sample of 267 daily smokers participated in a random digit dialing telephone survey. Respondents were asked about their level of interest in self-help materials that would help them quit smoking. Potential predictors of level of interest were examined first through bivariate analyses, followed by a multinomial logistic regression. Of daily smokers, 27% were very interested in receiving a self-help booklet, 28% were somewhat interested, and 45% were not at all interested. Interest in self-help materials was positively related to intent to quit in the next 6 months and to low family income.

Adult↗
PubMed2003

The effects of drinking-driving laws: a test of the differential deterrence hypothesis.

AIMS: Ontario introduced an Administrative Driver's Licence Suspension (ADLS) law in 1996, whereby a person with a blood alcohol level over the legal limit of 80 mg%, or who refused to provide a breath sample, would have his or her driver's licence suspended immediately for a period of 90 days. We test the differential deterrence hypothesis which would predict that social or lighter drinkers would be more affected by the Administrative Driver's License Suspension law than heavier drinkers. DESIGN: Data from the 1996 and 1997 cycles of the Ontario Drug Monitor, a general population survey of Ontario adults (monthly cross-sectional surveys), were employed (response rate 64-67%). Analyses were restricted to drivers who reported at least some drinking during the last year (n = 3827). The total number of drinks consumed during the past 12 months was analysed with analysis of variance. FINDINGS: We found that the mean alcohol consumption of those who reported drinking-driving increased significantly after the ADLS was introduced, whereas the alcohol consumption of those who did not drive after drinking remained the same. CONCLUSIONS: The limits of this study include a lack of comparison data from regions without ADLS, a reliance on self-report measures, possible age restrictions of the findings and the fact that only an inferential test of the differential deterrence hypothesis is permitted by the data. Despite these limitations, these findings are consistent with the prediction that lighter or more moderate drinkers will tend to stop driving after drinking completely, and thus drop out of the drinking-driving population when the ADLS law was introduced, leaving heavier drinkers in this population. It will be important to continue to examine the dynamics of differential deterrence over a longer interval.

Adult↗
PubMed2003

Psychiatric distress among road rage victims and perpetrators.

OBJECTIVE: To investigate the relation between psychiatric distress and road rage, paying particular attention to the potential link between psychiatric illness and frequent involvement in serious forms of road rage. METHOD: This study reports data on road rage involvement, demographic characteristics, and mental health for a representative sample of 2610 adults in Ontario. The mental health indicator was the 12-item General Health Questionnaire. RESULTS: A cluster analysis revealed 5 distinct groups of people affected by road rage. The most serious offenders (referred to hereafter as the hard core road rage group), representing 5.5% of those affected, exhibited frequent involvement in the most severe forms of road rage and were the most likely (27.5%) to report psychiatric distress. CONCLUSIONS: Road rage, particularly experiences of victimization, is related to psychiatric distress. Evidence of psychiatric distress was highest among hard core road rage perpetrators, individuals noted for frequent involvement in serious aggressive and violent conduct. Further research is needed on violence and road rage and its link to mental health.

Adolescent↗
PubMed2003

Illicit drug use among Canadian University undergraduates.

The purpose of this study was to examine rates and patterns of illicit drug use among Canadian university undergraduates, to compare these rates with those for non-university samples, and to describe drug-use trends among university undergaduates in the province of Ontario between 1988 and 1998. A national mail survey was carried out based on stratified 2-stage sample design. The sample comprised 7,800 Canadian undergraduates from 16 universities (52% of eligible respondents). Approximately 47.5% reported use of illicit drug durning their life, 29.6% in the previous 12 months, and 18.7% since the beginning of the academic year. Cannabis was by far the most widley used drug (47.0%, 28.7%, and18.2%, respectively). Many of the gender and regional associations were similar to those found in general-populations surveys. Comparisons to non-university peers did not indicate elevated rates among university students. Among Ontario university undergraduates the use of cannabis, hallucinogens, methamphetamines, crack, and herion remained stable between 1988 and 1998. The use of cocaine declined from 4.8% to 1.7%. Rates of illicit drug use were not appreciably higher than those among their non-university peers. Other public-health issues, such as heavy drinking and poor mental health, override those related to illicit drug use.

Adult↗
PubMed2002

Multilevel analysis of situational drinking among Canadian undergraduates.

Using a multi-level approach, we examined the contribution of drinking setting characteristics and of individual characteristics on the alcohol intake per drinking occasion. The data are drawn from the Canadian Campus Survey, a national mail survey conducted in 1998 with a random sample of 8,864 students in 18 universities. For each student, up to five drinking occasions were investigated, resulting in 26,348 drinking occasions among 6,850 drinkers. At the individual level this study focused on the university life experience. At the situational level, information about alcohol intake was recorded relative to why, when, where and with whom drinking occurred. Our results show that drinking setting is as important as the individual characteristics in explaining the alcohol intake per occasion. Policies aimed at reducing students alcohol intake may be more beneficial if they address both situational and individual factors.

Adolescent↗
PubMed2002

More Canadian students drink but American students drink more: comparing college alcohol use in two countries.

AIMS: To compare alcohol use among US and Canadian college students. DESIGN: Results of the 1999 College Alcohol Study and the 1998 Canadian Campus Survey are compared. SETTING: One hundred and nineteen nationally representative US 4-year colleges and universities in 40 states and 16 nationally representative Canadian 4-year universities. PARTICIPANTS: Randomly selected students under 25 years (12 344 US and 6729 Canadian). MEASUREMENTS: Self-reports of alcohol use and heavy alcohol use. FINDINGS: The prevalence of life-time and past year alcohol use is significantly higher among Canadian students than US students (92% versus 86%, 87% versus 81%). The prevalence of heavy alcohol use (typically consuming five or more drinks in a row for males/four or more for females) among past-year and past-week drinkers is significantly higher among US students than Canadian students (41% versus 35%, 54% versus 42%). In both countries older [corrected] students and students living at home with their parents are less likely to be heavy drinkers; students who report first drunkenness before the age of 16 are more likely to be heavy drinkers in college. CONCLUSION: Programs aimed at students' heavy alcohol use should target freshman at entry or earlier. Since students living with their parents are less likely to be heavy drinkers, parents may play a potentially important role in prevention efforts. The patterns of drinking in both countries may be influenced by the legal minimum drinking age. However, the relationship is complex and must be viewed in the context of other variables such as chronological age.

Adolescent↗
PubMed2002

For all these reasons, I do...drink: a multilevel analysis of contextual reasons for drinking among Canadian undergraduates.

OBJECTIVE: Student drinking is largely related to the setting of the drinking occasion as well as to individual psychosocial characteristics. This article assesses the effect of the reasons for drinking on situational alcohol use above and beyond other environmental and individual factors. METHOD: The data were drawn from the Canadian Campus Survey, a national mail survey conducted in 1998 with a sample of 8,864 students in 18 universities. Each student provided information on up to five drinking occasions, resulting in 25,347 drinking occasions among 6,598 drinkers. At the individual level, this study focused on the university life experience. At the situational level, information about alcohol intake was recorded relative to why, when, where and with whom drinking occurred and the reasons for drinking. RESULTS: Our results show that the reasons for drinking explain 8.3% of the variance in individual alcohol intake per occasion at the individual level and 8.1% at the drinking occasion level. CONCLUSIONS: Reasons for drinking and the drinking setting together influence consumption. Moreover, reasons are context specific, because students drink for different reasons in different contexts. Thus, contextual motivational models may be more effective in helping one understand the various pathways to alcohol use and misuse.

Alcohol Drinking↗
PubMedDate not supplied

Psychiatric and substance use disorders in late adolescence: the role of risk and perceived social support.

This article explores how measures of risk and perceived social support relate to different configurations of adolescent psychopathology using data from a community-based, longitudinal investigation of 284 individuals interviewed in 1982 at age 5 and again at age 19. Discriminant analysis was used to assess differences in risk and social support variables among eight clusters of youth: anxious, anxious drinkers, depressed, depressed drug abusers, antisocial, antisocial drinkers, drug abusers, problem drinkers, and a ninth group representing those participants without a diagnosis. The results indicated that one function, defined by loadings for (low) family support and (high) early cumulative risk, accounted for the majority of between-group associations. Two groups of drug-abusing youth with multiple adjustment problems were highest on this function, while non-disordered youth and a group of participants with substance abuse alone were lowest. Findings are discussed in terms of the need to consider comorbidity when examining risk factors for later disorder.

Adolescent↗
PubMedDate not supplied

Part-time work and cigarette use among teenagers. Does age moderate this relationship?

OBJECTIVES: Previous studies on part-time work and substance use suggest that those teenagers working longer hours during the school year use cigarettes more frequently than those working less or not at all. The purpose of this study was to investigate whether age moderates the relationship between part-time work hours and smoking status. METHODS: This 1999 study consisted of a cross-sectional survey of 4,297 junior high and high school students aged 13 to 19 from 111 randomly selected schools in Ontario. RESULTS: Compared to not working at all,moderate (11 to 20 hours/week) to long (21+ hours) work hours was more strongly associated with the probability of being a smoker among young teenagers (13 to 16 years old). Work intensity was only weakly associated with cigarette use in late adolescence (17 to 19 years old). CONCLUSIONS: Working longer hours during school is associated with cigarette use, particularly among young teenagers. Although these cross-sectional data prohibit any firm conclusions regarding causality, the strong association observed among young teenagers increases the plausibility of early work transition being a risk factor for initiating smoking.

Adolescent↗
PubMedDate not supplied

Heavy drinking on Canadian campuses.

OBJECTIVE: To describe the prevalence and frequency of heavy drinking episodes among Canadian undergraduates. METHODS: Data are drawn from the Canadian Campus Survey, a national mail survey, conducted in the fall of 1998, with a random sample of 7,800 students from 16 universities. RESULTS: Overall, 62.7% and 34.8% of students reported consuming 5 or more drinks and 8 or more drinks, respectively, on a single occasion at least once during the fall semester. On average, drinkers reported having 5 or more drinks almost 5 times during the fall semester, and having 8 or more drinks almost twice during the same period. The groups reporting the highest rates of heavy drinking were males, those living in university residences, those with low academic orientation and those with high recreational orientation. INTERPRETATION: Generally, this study has shown that heavy drinking is highly engrained in Canadian undergraduates' drinking patterns, and is related to a number of factors. These factors can be used to develop targeted prevention efforts.

Adult↗