Childhood Passive Smoking Exposure and Age at Menarche in Chinese Women Who Had Never Smoked: The Guangzhou Biobank Cohort Study.

ABSTRACT:

Objective

We examined the associations between childhood passive smoking exposure and age at menarche in women who had never smoked in southern China.

Methods

Among 30,518 participants in Guangzhou Biobank Cohort Study (GBCS) from 2003-2008, 20,061 women who had never smoked and had complete outcome data were included. Childhood passive smoking exposure was defined as living with 1 or more smokers in the same household during childhood. Data on the number of smokers in the household and frequency of exposure (density and frequency) were also obtained. Age at menarche was measured as a continuous variable.

Results

11,379 (56.7%) participants were exposed to passive smoking during childhood. Compared to those with no passive smoking exposure during childhood, those with

SUBMITTER: Yang S 

PROVIDER: S-EPMC4506068 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature