Table 3.

Proportion of children stunted at 6–9 years old according to intervention groups

(Risk ratio and 95 % confidence intervals)

		Proportion stunted		Unadjusted		Adjusted
Intervention group	n	n	%	RR	95 % CI*	RR	95 % CI†
Three groups against the placebo
Placebo	202	33	16·3		Reference		Reference
Vitamin B12	201	28	13·9	0·85	0·52, 1·41	0·82	0·49, 1·35
Folic acid	204	37	18·1	1·11	0·69, 1·78	1·20	0·75, 1·92
Vitamin B12 and folic acid	184	23	12·5	0·76	0·44, 1·30	0·79	0·46, 1·35
2 × 2 groups
Placebo vitamin B12	403	70	17·2		Reference		Reference
Vitamin B12	385	51	13·2	0·77	0·54, 1·10	0·73	0·51, 1·05
Placebo folic acid	406	60	15·1		Reference		Reference
Folic acid	388	60	15·5	1·02	0·71, 1·46	1·10	0·77, 1·58

^*Generalised linear model with the Poisson family and log link.

^†Adjusted for wealth quintiles.