Monthly changes in LAZ by four-arm groups including the control group receiving IFA/IFA supplementation (black line), the prenatal only supplementation group receiving BEP/IFA (blue line), the postnatal only supplementation group receiving IFA/BEP (yellow line), and the combined pre- and postnatal supplementation group receiving BEP/BEP (red line).
Line graphs represent locally weighted scatterplot smoothing of observed values. Group differences were estimated using mixed-effects models with random intercepts for infant and random slopes for intervention time, with fixed effects including time, quadratic time, intervention group, and time × group interaction adjusted for clustering indicators (health center and randomization block), and a priori determined prognostic factors (maternal height, BMI, MUAC, hemoglobin, age and gestational age at inclusion, and parity). Compared to the control group, effect sizes in the prenatal only supplementation group (ES: 0.005 SD/month, 95% CI: −0.007 to 0.017, (DOCX)Click here for additional data file.