Increased Risk of ADHD at Short and Long Interpregnancy Intervals in a National Birth Cohort.

ABSTRACT:

Background

Short or long interpregnancy interval (IPI) may adversely impact conditions for foetal development. Whether attention deficit hyperactivity disorder (ADHD) is related to IPI has been largely unexplored.

Objectives

To examine the association between IPI and ADHD in a large, population-based Finnish study.

Methods

All children born in Finland between 1991 and 2005 and diagnosed with ADHD (ICD-9 314x or ICD-10 F90.x) from 1995 to 2011 were identified using data from linked national registers. Each subject with ADHD was matched to 4 controls based on sex, date of birth, and place of birth. A total of 9564 subjects with ADHD and 34,479 matched controls were included in analyses. IPI was calculated as the time interval between sibling birth dates minus the gestat

SUBMITTER: Cheslack-Postava K 

PROVIDER: S-EPMC10339818 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature