Table 2

The effect on mortality of receiving VAS in a campaign, overall and by sex, campaign and age group

	Rate per 1000 PYRS (deaths/PYRS)	Crude MRR (95% CI)			Adjusted MRR (95% CI)^*
	Rate per 1000 PYRS (deaths/PYRS)	All	Boys	Girls	All	Boys	Girls
All
VAS	15.3 (44/2873)	0.93 (0.55 to 1.58)	0.85 (0.44 to 1.67)	1.07 (0.45 to 2.57)	0.78 (0.46 to 1.34)	0.73 (0.37 to 1.43)	0.89 (0.37 to 2.14)
No VAS	15.9 (20/1260)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)
No information	32.5 (8/227)	2.17 (0.96 to 4.94)	2.04 (0.73 to 5.71)	2.40 (0.62 to 9.27)	2.10 (0.75 to 5.89)	1.96 (0.59 to 6.57)	2.35 (0.53 to 10.4)
2007
VAS	4.4 (6/1352)	0.40 (0.14 to 1.15)	0.54 (0.15 to 1.85)	0.18 (0.02 to 1.69)	0.38 (0.13 to 1.10)	0.52 (0.15 to 1.79)	0.16 (0.02 to 1.59)
No VAS	10.9 (8/731)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)
2008
VAS	24.4 (38/1521)	1.04 (0.54 to 2.00)	0.88 (0.39 to 2.00)	1.37 (0.46 to 4.09)	1.02 (0.53 to 1.96)	0.86 (0.38 to 1.96)	1.32 (0.44 to 3.94)
No VAS	21.7 (12/529)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)
p For same effect of VAS in 2007 and 2009		0.13	0.51	0.11	0.12	0.50	0.11
Children aged 6–11 months
VAS	23.3 (16/687)	1.35 (0.48 to 3.76)	1.68 (0.47 to 6.07)	0.84 (0.15 to 4.66)	1.14 (0.41 to 3.19)	1.41 (0.40 to 5.10)	0.72 (0.13 to 3.98)
No VAS	17.0 (5/294)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)
Children aged 12–35 months
VAS	12.8 (28/2186)	0.81 (0.43 to 1.51)	0.62 (0.27 to 1.39)	1.19 (0.43 to 3.30)	0.69 (0.36 to 1.29)	0.53 (0.23 to 1.20)	0.98 (0.35 to 2.72)
No VAS	15.5 (15/966)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)	1 (ref)
p For same effect of VAS in younger and older children		0.40	0.20	0.74	0.41	0.21	0.76

↵* Adjusted for sex, campaign, seen vaccination card, ethnicity and maternal education.
MRR, mortality rate ratio; PYRS, person-years; VAS, vitamin A supplementation.