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Table 2 The performance of various PHQ-9 cut-off scores in detecting major depression

From: Reliability and validity of the Thai version of the PHQ-9

Cut-off score Sensitivity Specificity Positive predictive value Negative predictive value Likelihood ratio – positive Likelihood ratio – negative
≥ 6 0.95 0.48 0.12 0.99 1.81 0.11
≥ 7 0.95 0.55 0.13 0.99 2.12 0.095
≥ 8 0.89 0.65 0.16 0.99 2.56 0.16
≥ 9 0.84 0.77 0.21 0.99 3.71 0.2
≥ 10 0.74 0.85 0.27 0.98 5.04 0.31
≥ 11 0.68 0.89 0.31 0.97 6.13 0.36
≥ 12 0.68 0.90 0.34 0.98 7.12 0.35
≥ 13 0.63 0.94 0.43 0.97 10.26 0.39
≥ 14 0.47 0.96 0.47 0.96 12.32 0.55
≥ 15 0.37 0.97 0.50 0.95 13.68 0.65