Table 4.

The predictive power of immunological criteria to detect virological treatment failure at Tefera Hailu Memorial Hospital, Sekota, northeast Ethiopia, 2019

Immunological failure	Virological failure (> 1000 copies/ml)		Total
	Yes	No
Yes (< 500 cells/µL)	10	8	18
No (> 500 cells/µL)	39	238	277
Total	49	246	295

^{Sensitivity = true positive (10)/true positive (10) + false negative (39)*100 = 20.4 %. PPV = true positive (10)/true positive (10) + false positive (8) * 100 = 55.5%. Specificity = true negative (238)/true negative (238) + false positive (8) * 100 = 96.75%. NPV = true negative (238)/true negative (238) + false negative (39)  * 100 = 86 %}