Worries about others' substance use-Differences between alcohol, cigarettes and illegal drugs?

While it is well documented that many experience harm from others' substance use, little is known about the psychological strain associated with others' use. The aims were: (1) to describe the prevalence of worries about others' alcohol, cigarette and illegal drug use, (2) whose substance use people worry about, (3) the overlap in worries, and (4) to examine how worries about others' use of each substance vary according to demographics, own substance use and experience of harm from others' use.

A population survey was conducted among 16-64year old Norwegians (N=1667). Respondents' reported on worries about others' alcohol, cigarette and illegal drug use, measures of experiences of harm from others' use of the three substances, and own substance use.

Worries about others' drinking were most prevalent. Among those who worried, others' cigarette and illegal drug use caused more frequent worry. While worry about cigarette use was mostly associated with family members' use, worry about others' alcohol and illegal drug use more often concerned friends'/acquaintances' use. About half worried about others' use of at least one substance. Across all three substances, experience of harm from others' substance use was most strongly related to worries.

Worries about others' substance use are common and reflect the prevalence of use of the substances in the population. In sum, the findings suggest that worry about others' alcohol and illegal drug use is primarily related to acute harm while worry about others' cigarette smoking is more related to chronic harm.