Maternal pre-pregnancy weight and obesity associated with infant - TopicsExpress

Maternal pre-pregnancy weight and obesity associated with infant cognitive development. ije.oxfordjournals.org/content/42/2/506.full.pdf+html Background Maternal pre-pregnancy obesity may be associated with impaired infant neuropsychological development; however, there are few studies and it is unclear if reported associations are due to intrauterine mechanisms. Methods We assessed whether maternal pre-pregnancy overweight and obes- ity were associated with cognitive and psychomotor development Results The percentage of overweight and obese mothers was 18% and 8%,scores (mean 100 15) of children aged 11–22 months in two birth cohorts: Environment and Childhood (INMA, Spain; n 1⁄4 1967) andMother-Child (RHEA, Greece: n 1⁄4 412). Paternal body mass index (BMI) was used as a negative control exposure. Maternal pre-pregnancy obesity was associated with reduced infant cognitive development scores in both INMA (score reduction: 2.72; 95% CI: 5.35, 0.10) and RHEA (score reduction: 3.71; 95% CI:8.45, 1.02), after adjusting for socioeconomic variables and paternal BMI. There was evidence in both cohorts of a dose-response relationship with continuous maternal BMI. Paternal overweight/obesity was not associated with infant cognitive development. Conclusions This study in two birth cohorts with moderately high obesity prevalence suggests that maternal pre-pregnancy obesity is associated with reduced child cognitive development at early ages. This association appears more likely to be due to maternal than shared family and social mechanisms, but further research is needed to disentangle a direct intrauterine effect from other maternal con- founding factors. Casas, M., Chatzi, L., Carsin, A. E., Amiano, P., Guxens, M., Kogevinas, M., ... & Vrijheid, M. (2013). Maternal pre-pregnancy overweight and obesity, and child neuropsychological development: two Southern European birth cohort studies. International journal of epidemiology, 42(2), 506-517.

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