Table 3. Subgroup analysis results of true/false positives and negatives in Tamale Teaching Hospital, Ghana.

	n	TP	PP	TN	FN	PPV	NPV	PPA	NPA	Sensitivity (95%CI)	Specificity (95%CI)
Overall	193	14%	15%	64%	8%	48%	89%	28%	95%	64% (95%CI 49–79)	81% (95%CI 75–87)
Symptomatic	135	10%	19%	64%	7%	34%	90%	22%	94%	94%	77% (95%CI 69–85)
Asymptomatic	58	22%	5%	64%	9%	81%	87%	54%	96%	58% (95%CI 38–78)	93% (95%CI 85–100)

TP = true positives, FP = false positives, TN = true negatives, FN = false negatives, PPV = positive predictive value, NPV = negative predictive value, PPA = positive predictive accuracy, NPA = negative predictive accuracy.