Premium
Birth by caesarean section and educational achievement in adolescents
Author(s) -
Slykerman Rebecca F.,
Li Eileen,
Shackleton Nichola,
Milne Barry J.
Publication year - 2021
Publication title -
australian and new zealand journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.734
H-Index - 65
eISSN - 1479-828X
pISSN - 0004-8666
DOI - 10.1111/ajo.13276
Subject(s) - caesarean section , birth certificate , percentile rank , sibling , population , demography , medicine , odds ratio , confounding , percentile , pediatrics , obstetrics , family medicine , psychology , pregnancy , developmental psychology , environmental health , biology , statistics , mathematics , genetics , sociology
Background Birth by caesarean section has been shown to alter the composition of the early infant gut microbiota and postulated to influence cognitive outcomes via the gut‐brain axis. Aims To determine whether birth by caesarean section is associated with secondary school educational achievement. Methods Whole‐population administrative data were used from anonymised individual level linkage of birth records to educational and health information from the New Zealand Integrated Data Infrastructure (IDI). Participants were 111 843 children born between 1 January 1996 and 31 December 1998 for whom mode of delivery information was available from International Classification of Diseases 9th edition codes in maternal records. The National Certificate of Educational Achievement (NCEA) is the main secondary school qualification undertaken by New Zealand students. Multivariable linear regression models were used to examine the association between mode of delivery and educational achievement. A family fixed effect analysis compared educational achievement outcomes in sibling pairs where one sibling was delivered by caesarean section and one delivered vaginally. Results After adjustment for potential confounders, there was no significant association between mode of delivery and achievement of university entrance (odds ratio = 0.98, 95% CI: 0.94‐1.02). NCEA percentile scores were lower in caesarean born infants (Estimate = −0.37, 95% CI: −0.69 to −0.06)). However, in the fixed effect sibling analysis caesarean section was no longer significantly associated with NCEA percentile scores. Conclusions We find that caesarean section is not related to educational outcomes, suggesting that even if the infant gut microbiota is altered in caesarean section, it does not appear to have a measurable impact on adolescent academic achievement.