High rainfall at birth is associated with raised inattention scores on the Conners adult ADHD rating scale among healthy participants in Japan

Keisuke NotoDepartment of Psychiatry, Yamagata University Faculty of Medicine, Toshinori ShirataDepartment of Psychiatry, Yamagata University Faculty of Medicine, Yusuke SaitoDepartment of Psychiatry, Yamagata University Faculty of Medicine, Haruka MuraosaDepartment of Psychiatry, Yamagata University Faculty of Medicine, Konoka NomuraDepartment of Psychiatry, Yamagata University Faculty of Medicine, Shohei KawaiDepartment of Psychiatry, Yamagata University Faculty of Medicine, Toshiki ObataDepartment of Psychiatry, Yamagata University Faculty of Medicine, Gaku AboshiDepartment of Psychiatry, Nihonkai General Hospital, Akihito SuzukiDepartment of Psychiatry, Yamagata University Faculty of Medicine

Australasian Psychiatry

Published online on March 03, 2026

Abstract

Australasian Psychiatry, Volume 34, Issue 4, Page 372-378, August 2026.
IntroductionBirth during the 3 month period ending in August has been associated with increased risk of attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD), especially in regions where the school year starts in September. ...