Table 2.

Anthropometric data at baseline (6 months), during (9 and 12 months) and at the end (18 months) of the cluster-randomized controlled trial assessing the efficacy of caterpillar cereal on infant stunting and anaemia, rural Equateur Province, Democratic Republic of Congo, 2010–2012

	Caterpillar cereal group			Control group
	n	n or Mean	% or sd	n	n or Mean	% or sd	P value†
Stunting prevalence (LAZ <−2), n and %
6 months	111	40	36	111	37	33	0·71
9 months	97	41	42	103	46	45	0·90
12 months	93	44	47	99	45	46	0·82
18 months	81	54	67	82	58	71	0·69
LAZ, mean and sd
6 months	111	−1·5	1·4	111	−1·5	1·4	0·71
9 months	97	−1·7	1·2	103	−1·8	1·5	0·76
12 months	93	−1·9	1·2	99	−2·0	1·5	0·67
18 months	81	−2·5	1·2	82	−2·6	1·7	0·54
Linear growth velocity (cm/month), mean and sd	79	0·9	0·3	81	0·9	0·2	0·76
Wasting prevalence (WLZ <−2), n and %
6 months	111	10	9	110	14	13	0·61
9 months	97	9	9	102	5	5	0·37
12 months	91	6	7	94	7	7	0·91
18 months	80	6	8	80	8	10	0·60
WAZ, mean and sd
6 months	111	−1·0	1·4	110	−1·2	1·4	0·20
9 months	97	−1·2	1·4	102	−1·0	1·2	0·32
12 months	91	−1·2	1·1	94	−1·1	1·3	0·47
18 months	80	−1·5	1·2	82	−1·3	1·2	0·40
WLZ, mean and sd
6 months	111	0·0	1·5	110	−0·2	1·8	0·22
9 months	97	−0·2	1·4	102	0·1	1·2	0·07
12 months	91	−0·2	1·1	94	0·1	1·4	0·11
18 months	79	−0·4	1·3	80	−0·2	1·4	0·37

LAZ, length-for-age Z-score; WLZ, weight-for-length Z-score; WAZ, weight-for-age Z-score.

^† P value calculated using longitudinal linear mixed models (for the categorical measures) and robust Poisson generalized linear model extensions (for binary measures) utilizing a GEE (generalized estimating equation extensions) approach with a robust variance estimator to adjust for clusters and correlation within participants across the longitudinal measures.