Association between family structure, parental smoking, friends who smoke, and smoking behavior in adolescents with asthma.

Recent investigations show that the smoking prevalence among asthmatic adolescents is higher than among healthy adolescents, and the causes that lead these asthmatic adolescents to smoke are unclear. We investigated the association between family structure, parental smoking, smoking friends, and smoking in asthmatic adolescents (n = 6,487). After adjusting for sex and age, logistic regression analyses showed that nonintact family structure, parental smoking, and smoking friends are associated with smoking in adolescents with and without asthma.

[Associations between family history of allergy, exposure to tobacco smoke, active smoking, obesity, and asthma in adolescents].

Objective: The relationships between asthma in adolescents and various environmental and social exposures needs to be clarified. The aim of this study was to determine the association between family history of allergy, passive or active tobacco smoking, obesity, and asthma in adolescents.

Subjects And Methods: A population-based case-control study was carried out.

[Prevalence and risk factors for allergic conjunctivitis in children. Comparative study in two communities].

Objective: To determine the prevalence and risk factors for allergic conjunctivitis in childhood populations, in two communities with different urban and industrial development, and population density.

Methods: A questionnaire was applied to childhood from 6 to 14 years old, selected through cluster sampling. This was an epidemiologic study, observational, open, retrospective and cross-sectional.