Table 4.

Comparison of urine and sputum specimen for the diagnosis of active PTB in people living with HIV by using sputum culture as old standard, in Addis Ababa, Ethiopia.

Urine sample		Sputum culture positive			Sensitivity	Specificity	PPV	NPV	Kappa value
		Positive	Negative	Total
Smear	Positive	7	0	7	21.2%	100%	100%	76.4%	0.279
	Negative	26	84	110
	Total	33	84	117
Culture	Positive	13	4	17	39.4%	95.2%	76.5%	80%	0.406
	Negative	20	80	100
	Total	33	84	117
PCR	Positive	24	9	33	72.7%	89.3%	72.7%	89.3%	0.620
	Negative	9	75	84
	Total	33	84	117

PPV, positive predicted value; NPV, negative predicted value.