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Table 3 PHQ-9 operational characteristics

From: Utility of the PHQ-9 to identify major depressive disorder in adult patients in Spanish primary care centres

Cut-off Score Sensitivity Specificity Positive Predictive Value Negative Predictive Value Positive Likelihood Ratio Negative Likelihood Ratio Youden’s Index (J)
PHQ-9 ≥ 8 .98 (.94–.99) .51 (.37–.64) .84 .89 1.99 (1.50–2.66) .05 (.01–.14) .49
PHQ-9 ≥ 9 .96 (.91–.98) .59 (.45–.72) .86 .85 2.36 (1.68–3.30) .07 (.03–.16) .55
PHQ-9 ≥ 10 .95 (.89–.97) .67 (.53–.79) .88 .83 2.90 (1.93–4.34) .08 (.04–.17) .62
PHQ-9 ≥ 11 .90 (.84–.94) .73 (.60–.84) .90 .73 3.39 (2.11–5.42) .14 (.08–.24) .63
PHQ-9 ≥ 12 .84 (.77–.90) .78 (.64–.87) .91 .66 3.76 (2.22–6.37) .20 (.13–.31) .62
PHQ-9 ≥ 13 .80 (.72–.86) .84 (.71–.91) .93 .61 4.89 (2.58–9.27) .24 (.17–.35) .64
PHQ-9 ≥ 14 .78 (.70–.84) .88 (.76–.94) .94 .60 6.33 (2.98–13.47) .26 (.18–.36) .66
Algorithma .88 (.82–.93) .80 (.66–.88) .92 .72 4.33 (2.48–7.55) .15 (.09–.24) .68
  1. aMDD is diagnosed if at least one of the first symptoms (items) is rated with a 2 (more than half of the days) or a 3 (most days)