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Smoking habits do not differ for teens with, without asthma

(HealthDay)—Smoking habits do not differ for adolescents with asthma or their parents versus those without asthma, according to a letter to the editor published online Dec. 4 in Allergy.

Ulrika Hellberg, from the Karolinska Institutet in Stockholm, and colleagues examined self-reported smoking habits at age 16 years among adolescents and parents (4,089 participants) in relation to phenotypes of asthma. The authors included data for 2,994 adolescents.

The researchers found that 14.1 percent of participants had asthma at age 16 years. The prevalence of asthma phenotypes was 7.3 percent for adolescent-onset and 12.2 percent for persistent. Overall, 11.8 percent of adolescents reported smoking. The prevalence of smoking was similar for those with and without asthma (11.4 versus 11.8 percent; P = 0.79). Smoking prevalence was similar for adolescents without asthma and those with adolescent-onset asthma (11.1 versus 13.0 percent; P = 0.45). Adolescents with persistent asthma smoked less than those with adolescent-onset asthma (7.3 versus 13.0 percent; P = 0.04). In a model including parental smoking, persistent asthma correlated with reduced odds of adolescent smoking at age 16 years (odds ratio, 0.57; 95 percent confidence interval, 0.35 to 0.94). Among parents, 18.4 percent were smokers, with parents of children with asthma smoking to the same extent as parents of children without asthma (17.6 versus 18.5 percent; P = 0.65)

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