Adolescent pregnancy and linear growth of infants: a birth cohort study in rural Ethiopia

Nutrition Journal

Table 2 Parameter estimates from linear mixed effects model predicting linear growth of infants

Fixed effects (n = 1378)	Coefficient (β)	SE	P
Intercept	1.38	0.143	< 0.001*
Infant age (Time)	0.14	0.029	< 0.001*
Quadratic time effect (Time*Time)	−0.01	0.002	< 0.001*
Maternal age (15–19 years)	− 0.24	0.128	0.032
Maternal age*Time	0.05	0.034	0.179
LAZ at birth	0.38	0.029	< 0.001*
Maternal education (ref = no formal education)
Primary	0.05	0.077	0.518
Primary*Time	0.02	0.007	0.051
≥ Secondary	0.10	0.135	0.417
≥ Secondary*Time	0.03	0.013	0.024
Wealth index (ref = low)
Middle	0.21	0.084	0.004*
Middle*Time	−0.05	0.008	0.485
High	0.13	0.084	0.018
High*Time	0.01	0.008	0.245
Iron-folate supplement (≥90 days)	−0.07	0.074	0.305
Iron-folate*Time	0.15	0.007	0.018
Illness in 2 weeks (Yes)	0.05	0.070	0.495
Illness in 2 weeks *Time	−0.15	0.006	0.001*
Random effects
Variance of random intercept	0.004	0.006
Variance of random slope	0.913	0.063
Covariance of random intercept and slope	−0.033	0.005
Variance of residuals	0.402	0.011

Restricted maximum likelihood estimation (REML) was used to estimate the parameters, SE standard error, *Statistical significance after adjustment for multiple testing using Benjamini-Hochberg method

ISSN: 1475-2891