Table 2.

 Effect of sex and season of supplementation on impact of vitamin A on mortality during first 12 months of life

	Mortality/1000 person years (deaths/person years)
	All	Boys	Girls
Rainy season
Vitamin A + BCG	59 (54/913)	57 (26/455)	61 (28/458)
Placebo + BCG	32 (32/1003)	37 (18/490)	27 (14/512)
Mortality rate ratio (95% CI)	1.84 (1.19 to 2.85)	1.53 (0.84 to 2.79)	2.23 (1.18 to 4.24)
Dry season
Vitamin A + BCG	39 (34/882)	31 (14/448)	46 (20/433)
Placebo + BCG	61 (54/881)	69 (32/462)	53 (22/418)
Mortality rate ratio (95% CI)	0.63 (0.41 to 0.97)	0.45 (0.24 to 0.84)	0.88 (0.48 to 1.61)
Homogeneity of effects	P=0.0006	P=0.0058	P=0.0382