Table 4. Infant mortality rates from HSA records and validation survey, the ratio of the two rates and corresponding 95% confidence intervals.

Annual period	Infant mortality rate (per 1000)
	HSAs data		Validation survey		Ratio of mortality rates, HSAs data to validation Survey
	Rate	95%CI	Rate	95%CI	Ratio			95%CI
	BALAKA
Jan 2010–Dec 10	42.1	(29.4,54.8)	68.0	(54.1,81.9)			62.0	(43.3,88.8)
Apr 2010–Mar 11	44.4	(30.6,58.1)	64.5	(50.1,78.9)			68.8	(47.2,100.2)
Jul 2010–June 11	40.3	(28.7,51.9)	64.3	(50.4,78.2)			62.7	(44.0,89.5)
Oct 2010–Sep 11	33.4	(23.5,43.3)	64.0	(50.0,78.0)			52.2	(36.3,75.2)
	SALIMA
Jan 2010–Dec 10	54.7	(44.7,64.7)	71.8	(58.0,85.6)			76.2	(58.6,99.2)
Apr 2010–Mar 11	50.8	(40.6,61.1)	70.2	(56.7,83.8)			72.4	(54.9,95.4)
Jul 2010–June 11	41.6	(32.0,51.2)	63.1	(50.1,76.1)			65.9	(48.5,89.5)
Oct 2010–Sep 11	28.4	(20.8,35.9)	53.9	(42.4,65.4)			52.7	(37.6,73.7)
	TOTAL
Jan 2010–Dec 10	49.0	(41.1,57.0)	69.8	(60.0,79.6)			70.2	(56.8,86.9)
Apr 2010–Mar 11	47.9	(39.5,56.2)	67.2	(57.1,77.4)			71.2	(56.7,89.5)
Jul 2010–June 11	41.0	(33.6,48.4)	63.7	(54.1,73.4)			64.4	(51.0,81.2)
Oct 2010–Sep 11	30.6	(24.5,36.6)	59.2	(50.5,67.9)			51.6	(40.5,65.9)