Table 6.

Mean HAZ by child age, group of intervention, and period

Child age (months)	Group	September Year 1	November Year 1	July Year 2	December Year 2	Change in mean	P	P for trend*
12–23	Control	−1.43	−1.38	−1.10	−1.19	+0.24	NS	0.035
	IPT	−1.42	−1.52	−1.05	−1.07	+0.35	< 0.01	< 0.01
24–35	Control	−1.46	−1.49	−1.30	−0.91	+0.55	< 0.001	< 0.001
	IPT	−1.40	−1.39	−1.26	−0.90	+0.50	< 0.001	< 0.001
36–47	Control	−1.36	−1.43	−1.48	−1.13	+0.23	NS	0.22
	IPT	−1.38	−1.40	−1.32	−0.96	+0.42	< 0.01	< 0.01
48–59	Control	−1.28	−1.21	−1.10	−0.93	+0.35	0.09	0.012
	IPT	−1.06	−1.04	−1.15	−0.87	+0.19	NS	0.36

^*Test for trend: period is dealt with as a continuous variable (from 1 to 4) within GLM.

NS, not significant.