Table 6. Performance of scoring system among HIV-infected and uninfected patients (121 HIV-infected patients, 285 HIV-uninfected patients).

Performance characteristics	Sensitivity	Specificity*	PPV	NPV	Area under ROC curve
Score at cut-off ≥2 amongHIV-positive patients	81.4 (66.6,91.6)	65.4 (53.8,75.8)	56.5 (43.3,69)	86.4 (75,94)	0.73 (0.65,0.81)
Score at cut-off ≥2 amongHIV-negative patients	86.2 (76.7,92.9)	62.4 (55.4,69)	47.3 (38.9,55.7)	92.1 (86.3,96)	0.74 (0.69,0.79)

^*p-value for the difference in specificity = 0.21.