Gestational age at birth and cognitive outcomes in adolescence: population based full sibling cohort study.

ABSTRACT:

Objective

To investigate the association between gestational age at birth and cognitive outcomes in adolescence.

Design

Nationwide population based full sibling cohort study.

Setting

Denmark.

Participants

1.2 million children born between 1 January 1986 and 31 December 2003, of whom 792 724 had one or more full siblings born in the same period.

Main outcome measures

Scores in written language (Danish) and mathematics examinations as graded by masked assessors at the end of compulsory schooling (ninth grade, ages 15-16 years), in addition to intelligence test score at military conscription (predominantly at age 18 years) for a nested sub-cohort of male adolescents. School grades were standardised as z scores according to year of examination, and intellige

SUBMITTER: Husby A 

PROVIDER: S-EPMC9846680 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature