Table 4. Risk score analysis of TB patients and healthy controls.

Score	0–2.014	>2.014	PPVa	NPVb
Training set			0.926	0.800
Healthy controls	24	4
TB	6	50
Validation set			0.919	0.674
Healthy controls	31	5
TB	15	57

^aPPV, positive predictive value

^bNPV, negative predictive value; TB, tuberculosis.