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Table 3 The performance of different thresholds of Tbag/PHA ratio for ATB diagnosis

From: The TBAg/PHA ratio in T-SPOT.TB assay has high prospective value in the diagnosis of active tuberculosis: a multicenter study in China

TBag/PHA threshold Sensitivity (95%CI) Specificity (95%CI) PPV (95%CI) NPV (95%CI) PLR (95%CI) NLR (95%CI)
0.1443 81.7 (79.6–83.6) 86.6 (83.9–89.0) 92.9 (90.9–94.9) 68.8 (66.8–70.8) 6.1 (5.1–7.3) 0.2 (0.2–0.2)
0.1817 76.2 (74.0–78.3) 90.1 (87.6–92.1) 94.3 (92.3–96.3) 63.9 (61.9–65.9) 7.7 (6.1–9.6) 0.3 (0.2–0.3)
0.2004 74.4 (72.1–76.5) 92.3 (90.1–94.1) 95.4 (93.4–97.4) 62.7 (60.7–64.7) 9.6 (7.5–12.4) 0.3 (0.3–0.3)
0.0783 90.1 (88.5–91.5) 67.8 (64.3–71.2) 85.7 (83.7–87.7) 76.1 (74.1–78.1) 2.8 (2.5–3.1) 0.1 (0.1–0.2)