Table 3 Validity of the Primary care Screening Questionnaire for Depression (PSQ4D) in different subgroups
SubgroupSensitivity % (95% CI)Specificity % (95% CI)Positive predictive value % (95% CI)Negative predictive value % (95% CI)Accuracy % (95% CI)
Whole sample (n=827)96 (94.6–97.4)87 (83.6–90.4)73.5 (72.0–75.0)98.3 (97.7–98.9)90 (89–91)
Women (n=491)95.3 (93.4–97.2)85.7 (82.5–88.9)77.9 (77.5–78.3)97.1 (96.3–97.9)89 (87.6–90.4)
Men (n=336)98.2 (97–99.4)88.6 (87.1–90.3)62.8 (60.2–65.4)99.6 (99.3–99.9)90 (88.4–91.6)
Age 18–40 years (n=504)91.2 (88.7–93.5)90.5 (89.2–91.8)73.1 (71.2–75.0)96.5 (95.7–97.3)90 (88.7–91.3)
Age 41–60 years (n=323)94.9 (93.7–96.1)80.4 (78.2–82.6)73.6 (71.1–76.1)82 (79.9–84.1)86 (84.1–87.9)
Public hospitals (n=552)95.3 (93.5–97.1)81.4 (79.7–83.1)73.2 (71.3–75.1)97 (96.3–97.7)86 (85.8–86.2)
Private hospitals (n=275)10095.5 (94.2–96.8)75 (72.4–77.6)10096 (94.8–97.2)