| Titre : | Timing and Trajectories of Fetal Growth Related to Cognitive Development in Childhood. (2009) |
| Auteurs : | VON EHRENSTEIN (Ondine-S) : USA. School of Public Health. University of California. Los Angeles. Los Angeles. CA. ; . JUN ZHANG ; MIKOLAJCZYK (Rafael-T) : DEU. School of Public Health. University of Bielefeld. Bielefeld. ; Division of Epidemiology Statistics and Prevention Research. Eunice Kennedy Shriver National Institute of Child Health and Human Development. National Institutes of Health. Bethesda. MD. USA |
| Type de document : | Article |
| Dans : | American journal of epidemiology (vol. 170, n° 11, 2009) |
| Pagination : | 1388-1395 |
| Langues: | Anglais |
| Mots-clés : | Enfant ; Intelligence ; Epidémiologie ; Homme |
| Résumé : | [BDSP. Notice produite par INIST-CNRS DR0xrk8F. Diffusion soumise à autorisation]. The authors investigated timing and trajectories of fetal growth in relation to childhood development in the National Institute of Child Health and Human Development-Scandinavian Study of Successive Small-for-Gestational Age Births (1986-1988) (n=1,059). Fetal size was assessed by ultrasound at 17,25, and 33 gestational weeks and at birth. Bayley Scales of Infant Development and the Wechsler Preschool and Primary Scale of Intelligence-Revised tests were conducted at ages 1 and 5 years, respectively, producing mental and psychomotor development indexes and verbal and performance intelligence quotients. Relative fetal size was calculated as a standard deviation score at each data point ; growth trajectories were explored with longitudinal mixture models. Fetal size at 17,25, and 33 weeks was positively associated with mental development index ; larger size at 33 weeks and at birth was associated with higher verbal intelligence quotient scores (2.61,95% confidence interval : 1.06,4.15 and 1.90,95% confidence interval : 0.67,3.13 increase per 1 standard deviation score, respectively) ; findings were similar for performance intelligence quotient. Seven trajectories were identified ; scores were lower for "small" and "medium-to-small" trajectories than for "medium" and "big" (representing normal size) trajectories : mental development index (P<0.01), performance intelligence quotient (P<0.001), and verbal intelligence quotient (P<0.001). Overall, larger fetal size in the second and third trimesters was positively associated with childhood development. Fetal growth trajectories may matter beyond birth. |
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