SMOKING AND ASTHMA AMONG 23-YEAR-OLDS

Participants in a longitudinal cohort study (the National Child Develo pment Study) were asked, at the age of 23, about their smoking habits and asthmatic experiences since 16 years of age. Of the total sample ( n = 8860) 10.8% reported smoking cigarettes, and the percentages were very similar in the two sexes although males tended to be heavier smok ers. There was an association between asthma and smoking; more than ex pected of those reported as having asthma at any age had smoked, and o f those with asthma since 16 years of age more reported smoking than e xpected by chance. In addition, all who report asthma at any time sinc e the age of 16 are overrepresented among those who report current smo king (p < 0.001). Those reporting asthma since 16 are more likely to b e living with others who smoke, and their spouses or partners were mor e likely to be heavy smokers (30+ cigarettes per day). In addition, in more than the expected number of homes where asthmatics live, there a re others who smoke(p < 0.003).