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Table 4 Performance at different score thresholds of tuberculosis prognostic point scoring

From: Development and validation of a prognostic score during tuberculosis treatment

Threshold Risk of death sensitivity specificity Positive predictive value Negative predictive value
46.5 (optimal) 4.8% 80.7 68.2 21.0 97.1
25 0.2% 100 0.6 9.5 100
30 0.4% 99.5 3.7 9.7 98.7
35 0.9% 97.6 20.7 11.4 98.8
40 1.9% 93.4 37.4 13.5 98.2
45 3.9% 85.6 61.5 18.9 97.7
50 7.8% 68.1 76.6 23.3 95.8
55 15.2% 41.8 90.3 31.0 93.7
60 29.0% 17.4 97.5 42.5 91.9
65 44.3% 5.2 99.7 64.7 90.9
70 62.7% 0.9 100 100 90.6