A cross-sectional exploration of smoking status and social interaction in a large population-based Australian cohort.

We used cross-sectional data to investigate whether current, past and never smokers report different levels of social interaction and whether the level of social interaction varied according to the type of interaction being measured. Self-reported questionnaire data were obtained from 239,043 men and women aged 45 years or older living in Australia between February 2006 and February 2010. The study participation rate was 18%. Poisson regression models were used to estimate the percentage differences in the mean values of four social interaction outcomes according to smoking status after adjusting for age, place of residence, income, education, health insurance status, physical limitation, psychological distress and exposure to passive smoke: number of times 1) spent with friends/family, 2) spoken on the telephone, 3) attended social meetings in the past week, and 4) number of people outside of home that can be depended upon. 7.6% of males and 6.9% of females were current smokers, 43.6% of males and 28.6% of females were ex-smokers and 48.8% of males and 64.5% of females had never smoked. Compared to never smokers, current smokers reported significantly fewer social interactions in the past week and had fewer people outside the home that they could depend on. Men and women current smokers attended 24.0% (95% CI, 20.3, 27.5) and 31.1% (95% CI, 28.1, 34.1) fewer social group meetings on average than never smokers. Smokers exposed to passive smoke reported higher levels of social interaction than those not exposed. Past smokers reported levels of social interaction that were intermediate to those of current and never smokers and the more years they had abstained from smoking, the more social interaction they reported on average. Our data are in line with previous research showing that smokers are not only worse off economically, physically and mentally, but are also less likely to be socially connected.