Socioepidemiology of cigarette smoking among Cambodian Americans in Long Beach, California.

We examined the prevalence of cigarette smoking among Cambodian Americans in Long Beach, California. A stratified random sample of 1,414 adult respondents was selected from 15 census tracts with high concentrations of Cambodian Americans. The prevalence of current smokers was 13.0%; the sex-specific prevalence of smoking was 24.4% for men and 5.4% for women. The mean age of the sample was 50.5 years; about 60% of the respondents were women. The survey response rate was 90.5% among households in which respondents self-identified as Cambodian American, and at least one person completed the survey. Significant covariates of current smoking were gender, age, education, marital status, and health status. The prevalence of smoking among Cambodian men was higher than among other males in California. Culturally-tailored interventions should consider demographic characteristics of the target population as well as the high level of respect given to religion, elders, and peers.

Asymmetry in scientific method and limits to cross-disciplinary dialogue: toward a shared language and science policy in pharmacogenomics and human disease genetics.

Pharmacogenomics is a hybrid field of experimental science at the intersection of human disease genetics and clinical pharmacology sharing applications of the new genomic technologies. But this hybrid field is not yet stable or fully integrated, nor is science policy in pharmacogenomics fully equipped to resolve the challenges of this emerging hybrid field. The disciplines of human disease genetics and clinical pharmacology contain significant differences in their scientific practices. Whereas clinical pharmacology originates as an experimental science, human disease genetics is primarily observational in nature. The result is a significant asymmetry in scientific method that can differentially impact the degree to which gene-environment interactions are discerned and, by extension, the study sample size required in each discipline. Because the number of subjects enrolled in observational genetic studies of diseases is characteristically viewed as an important criterion of scientific validity and reliability, failure to recognize discipline-specific requirements for sample size may lead to inappropriate dismissal or silencing of meritorious, although smaller-scale, craft-based pharmacogenomic investigations using an experimental study design. Importantly, the recognition that pharmacogenomics is an experimental science creates an avenue for systematic policy response to the ethical imperative to prospectively pursue genetically customized therapies before regulatory approval of pharmaceuticals. To this end, we discuss the critical role of interdisciplinary engagement between medical sciences, policy, and social science. We emphasize the need for development of shared standards across scientific, methodologic, and socioethical epistemologic divides in the hybrid field of pharmacogenomics to best serve the interests of public health.

Sociocultural determinants of tobacco use among Cambodian Americans.

The objectives of this study included the following: obtaining qualitative information on tobacco use among Cambodian Americans, identifying cultural factors that influence tobacco use and acquiring information for the development of effective smoking prevention and cessation strategies. Data were collected by using demographic and behavioral questionnaires and focus group interviews. A total of 14 focus group interviews that covered cultural practices associated with smoking were administered. Statistical analyses included univariate frequency distributions and cross-tabulations. The subjects (n = 119) were Cambodian American volunteers who participated in social services programs offered by a community service organization. All subjects were 18 years of age or older and resided in the city of Long Beach. The principal outcomes measured were cigarette smoking and tobacco use. Other variables included reasons for smoking, traditional uses of tobacco, stress factors related to smoking and the perceived health effects of smoking. Predisposing, reinforcing and enabling factors associated with tobacco-use behaviors included peer group influences, smoking adopted as a coping method, tobacco used for medicinal purposes and smoking practiced within cultural traditions. The frequency of smoking was four times higher among males than among females. Smokers (n = 29) in comparison with non-smokers (n = 90) tended to be men (79% versus 33%), not married (68% versus 49%) and unemployed (79% versus 54%), and had attained somewhat lower levels of education. The role of cultural factors needs to be considered when designing appropriate smoking cessation strategies for Cambodian Americans.

Association chain graphs: modelling etiological pathways.

Multiple time-dynamic and interrelated risk factors are usually involved in the complex etiology of disorders. This paper presents a strategy to explore and display visually the relative importance of different association pathways for the onset of disorder over time. The approach is based on graphical chain models, a tool that is powerful but still under-utilized in most fields. Usually, the results of these models are displayed using directed acyclic graphs (DAGs). These draw an edge between a pair of variables whenever the assumption of conditional independence given variables on an earlier or equal temporal footing is violated to a statistically significant extent. In the present paper, the graphs are modified in that confidence intervals for the strengths of associations (statistical main effects) are visualized. These new graphs are called association chain graphs (ACGs). Statistical interactions cause 'edges' between the respective variables within the DAG framework (because the assumption of conditional independence is violated). In contrast they are represented as separate graphs within the subsample where the different association chains may work within the ACG framework. With this new type of graph, more specific information can be displayed whenever the data are essentially described only with statistical main- and two-way interaction effects.

The natural course of DSM-IV somatoform disorders and syndromes among adolescents and young adults: a prospective-longitudinal community study.

OBJECTIVE: Although somatoform disorders are assumed to be chronic clinical conditions, epidemiological knowledge on their natural course based on representative samples is not available. METHOD: Data come from a prospective epidemiologic study of adolescents and young adults in Munich, Germany. Respondents' diagnoses (N = 2548) at baseline and follow-up on average 42 months later are considered. The follow-up incidence, stability as well as selected baseline risk factors (sociodemographics, psychopathology, trauma exposure) for the incidence and stability of somatoform disorders and syndromes are prospectively examined. Diagnostic information was assessed by using the standardized Munich-Composite International Diagnostic Interview (M-CIDI). RESULTS: Over the follow-up period, incidence rate for any of the covered somatoform diagnoses was 25.7%. Stability for the overall group of any somatoform disorder/syndrome was 48%. Female gender, lower social class, the experience of any substance use, anxiety and affective disorder as well as the experience of traumatic sexual and physical threat events predicted new onsets of somatoform conditions, while stability was predicted by being female, prior existing substance use, affective and eating disorders as well as the experience of a serious accident. CONCLUSIONS: At least for a substantial proportion of individuals, the overall picture of somatization seems to be relatively stable, but with fluctuation in the symptom picture over time. Being female, the experience of substance use as well as anxiety disorder seem to constitute risk factors for the onset of new somatoform conditions as well as for a stable course over time.

Life events and changes in the course of depression in young adults.

BACKGROUND: Few community-based studies have examined the impact of life events, life conditions and life changes on the course of depression. This paper examines associations of life events on depressive symptom onset, improvement, and stability. METHODS: Direct interview data from the Early Developmental Stages of Psychopathology Study (EDSP), a 4-5 year prospective-longitudinal design based on a representative community sample of adolescents and young adults, aged 14-24 years at baseline, are used. Life events were measured using the Munich Event-Questionnaire (MEL) consisting of 83 explicit items from various social role areas and subscales for the assessment of life event clusters categorized according to dimensions such as positive and negative and controllable and uncontrollable. Depressive disorders were assessed with the DSM-IV version of the Munich Composite Diagnostic Interview (M-CIDI). Multiple logistic regression analyses examined the effects of 22 predictors on the course of depression (onset, improvement, stability). RESULTS: Younger age, low social class, negative and stressful life events linked to the family were associated with increased risk of new onset of depression. Anxiety was a significant independent predictor of new onset of depression. Absence of stressful school and family events was related to improvement in depression. The weighted total number of life events predicted stable depression. CONCLUSIONS: The association between life events and the course of depression appears to vary according to the outcome being examined, with different clusters of life events differentially predicting onset, improvement, and stability.