Table 2

 Predictive value of scores for mortality

Severity scoreSensitivity(95% CI)Specificity(95% CI)PPV(95% CI)NPV(95% CI) (%)Area under ROC
ROC, receiver operator characteristics curve.
PSI class V67.5 (50.2 to 81.9)82.1 (77.6 to 85.9)28.4 (19.3 to 39.0)96.0 (93.1 to 97.9)0.82 (0.76 to 0.87)
PSI class IV+V97.3 (85.8 to 99.9)47.9 (42.5 to 53.2)16.4 (11.7 to 22.0)99.4 (96.7 to 99.9)0.82 (0.76 to 0.87)
CURB (⩾2)89.2 (74.5 to 96.9)58.1 (52.7 to 63.3)18.3 (12.9 to 24.7)98.1 (95.1 to 99.4)0.82 (0.75 to 0.88)
CURB-65 (⩾3)81.0 (64.8 to 92.0)67.9 (62.7 to 72.7)20.8 (14.5 to 28.4)97.2 (94.2 to 98.8)0.82 (0.76 to 0.88)
Modified BTS91.9 (78.1 to 98.3)49.8 (44.5 to 55.2)16.2 (11.4 to 21.8)98.3 (95.1 to 99.6)0.71 (0.65 to 0.75)
rATS40.5 (24.7 to 57.9)84.6 (80.4 to 88.2)21.7 (12.7 to 33.3)93.1 (89.7 to 95.6)0.63 (0.54 to 0.71)