Has the impact of cigarette smoking on mortality been underestimated by overlooking second-hand smoke? Tohoku medical megabank community-based cohort study.

ABSTRACT:

Objectives

Previous studies have assessed the impact of active smoking on mortality using the population-attributable fraction (PAF). However, these studies have not included second-hand smoking (SHS), potentially underestimating smoking's impact. We compared the PAF from active smoking alone with the PAF, including SHS exposure.

Design

Prospective cohort study.

Setting

A community-based cohort study in Japan.

Participants

40 796 participants aged ≥20 years.

Main outcome measures

SHS was defined as inhaling someone else's cigarette smoke at the workplace or home in the past year. We classified smoking status and SHS into ten categories: never-smoker without SHS, never-smoker with SHS, past smoker without SHS, past smoker with SHS, current smoker 1-9 ciga

SUBMITTER: Takase M 

PROVIDER: S-EPMC11973771 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature