Low-intensity cigarette smoking and mortality risks: a pooled analysis of prospective cohort studies in Japan.

ABSTRACT:

Background

Increasing proportions of smokers in Japan smoke <10 cigarettes per day (CPD). Yet, the health risks of low-intensity smoking in Asia are poorly understood.

Methods

We performed a pooled analysis of 410 294 adults from nine population-based prospective cohort studies participating in the Japan Cohort Consortium. Cigarette-use data were collected at each study baseline in 1983-1994. Study-specific hazard ratios (HRs) and 95% confidence intervals (CIs) for all-cause and cause-specific mortality were calculated using multivariable-adjusted Cox regression by CPD among current smokers and by age at cessation among former smokers, with never smokers as the referent group. Pooled HRs and CIs were computed using a random-effect model.

Results

The smoking prevalence

SUBMITTER: Inoue-Choi M 

PROVIDER: S-EPMC9614686 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature