Effects of the Great East Japan Earthquake on Secondary Sex Ratio and Perinatal Outcomes.

ABSTRACT:

Background

The effect of natural disasters on secondary sex ratio (SSR) and perinatal outcomes has been suggested. This study aimed to examine effects of the Great East Japan Earthquake on perinatal outcomes using vital statistics of Japan.

Methods

Birth registration data from vital statistics of Japan between March 2010 and March 2012 were used. Pregnant women who experienced the earthquake were categorized according to their gestational period as of March 11, 2011, as follows: gestational weeks 4-11, 12-19, 20-27, and 28-36 (2011 group). Similarly, pregnant women who did not experience the earthquake were categorized according to their gestational period as of March 11, 2010 and used as controls (2010 group). We also categorized prefectures as "extremely affected", "modera

SUBMITTER: Suzuki K 

PROVIDER: S-EPMC4728118 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature