Table 2.

Sensitivity and specificity values of the pooled data from studies of nitrite stick testing, according to age range and the evidence quality

Evidence level	Studies of infants				Studies of older children				Difference by age
	Studies		Cases	Sensitivity or specificity	Studies		Cases	Sensitivity or specificity	Contingency table analysis
	(n)	(References)	(n)		(n)	(References)	(n)		(p value)
Sensitivity
Level 1 only	2	[14, 19]	30	0.23	5	[12, 14, 27–29]	129	0.81	< 0.0001F
Levels 1 and 2	10	[14, 16, 19–26]	1284	0.38	7	[12, 14, 16, 27–30]	153	0.78	< 0.0001F
All 3 levels	11	[14, 16, 18–26]	1321	0.38	9	[12, 14, 16, 17, 27–30]	259	0.72	< 0.0001F
Specificity
Level 1	10	[14, 16, 19, 22–26, 31]	1783	0.990	7	[14, 16, 17, 27–30]	5952	0.996	0.002χ

^FFisher’s exact test. ^χChi-square test