Table 4 Proposed risk scale and corresponding predictive risk of ATB.

From: Nomogram to determine predictive risk for active tuberculosis based on the QuantiFERON-TB Gold In-Tube test

Risk level

Predictive risk

PPV (%)

NPV (%)

Low risk

0.000–0.161

NA

90.13–100.00

Moderate risk

0.162–0.448

NA

78.58–89.90

High risk

0.449–0.871

68.31–89.73

NA

Most likely ATB

0.872–1.000

90.34–100.00

NA

  1. NA Not applicable.
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