Table 5.

Morbidity incidence rates by treatment group

	Placebo	Iron and folic acid	Iron and folic acid with zinc
Diarrhoea
Episodes	1327	1355	1286
Person-years	341.5	352.8	368.0
Rate/child per year	3.89	3.84	3.50
RR (95% CI)	Ref	0.94 (0.84−1.05)	0.91 (0.81−1.01)
Median (IQR) duration (days)	2 (1−3)	2 (1−3)	2 (1−3)
Persistent diarrhoea
Episodes	24	19	27
Person-years	350.6	362.2	376.4
Rate/child per year	0.069	0.053	0.072
RR (95% CI)	Ref	0.74 (0.38−1.44)	1.04 (0.56−1.91)
Median (IQR) duration (days)	18 (16−24)	17 (16−19)	18 (16−22)
Dysentery
Episodes	187	166	164
Person-years	349.6	361.4	376.0
Rate/child per year	0.53	0.46	0.44
RR (95% CI)	Ref	0.78 (0.57−1.09)	0.85 (0.62−1.17)
Median (IQR) duration (days)	2 (1−3)	2 (1−3)	2 (1−3)
Acute lower respiratory infection
Episodes	481	482	461
Person-years	347.6	358.6	373.3
Rate/child per year	1.38	1.34	1.23
RR (95% CI)	Ref	0.92 (0.77−1.09)	0.91 (0.76−1.08)
Median (IQR) duration (days)	3 (2−4)	3 (2−4)	3 (2−4)