2.3. Anthropometrics
A child’s birth weight was transcribed from the child’s health record. Trained staff measured length/height and weight at ages 9, 18, 42, and 60 months. All measurements were conducted using calibrated measurement tools. Length/height was measured to the nearest 0.1 cm, and weight was measured to the nearest 10 g. The children were wearing light clothing. Both length/height and weight were measured twice, and the average was registered. BMI z-scores were calculated using the World Health Organization’s sex-specific growth charts [