Reliability of Parental Recall of Birth Weight, Birth Length and Gestational Age in the Multicenter Cohort Study IDEFICS

To investigate the reliability of parental recall of birth weight, birth length and gestational age several years after birth. Parentally recalled birth parameters were obtained from the European multicentric cohort study IDEFICS (Identification and prevention of dietary- and lifestyle-induced health effects in children and infants) and compared to the corresponding data externally recorded in the child’s medical check-up booklet. The agreement between the two sources was examined using Bland–Altman plots, intraclass correlation coefficients and Cohen’s kappa for clinically relevant categories. Additionally, logistic regression models were used to identify factors related to parental recall accuracy. A total of 4930 children aged 2 to 11 years were included. Accuracy of birth weight within 100 g was 88