Skip to main content

Advertisement

Table 1 Sensitivity, specificity, positive/negative predictive values, positive/negative likelihood ratios for major depression

From: The 'help' question doesn't help when screening for major depression: external validation of the three-question screening test for primary care patients managed for physical complaints

Parameter Two screening questions % (95% CI) Three screening questions % (95% CI)
Sensitivity 91.3% (81.4 to 96.4) 59.4% (47.0 to 70.9)
Specificity 65.0% (61.2 to 68.6) 88.2% (85.4 to 90.5)
Positive predictive value 21.6% (17.1 to 26.8) 34.7% (26.4 to 44.1)
Negative predictive value 98.6% (96.8 to 99.4) 95.3% (93.3 to 96.8)
Positive likelihood ratio 2.6 (2.3 to 3.0) 5.0 (3.8 to 6.7)
Negative likelihood ratio 0.1 (0.06 to 0.28) 0.5 (0.3 to 0.6)