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Table 2 Psychometric properties at optimal cut-off values of self-rating anxiety scales for screening of generalized anxiety disorder in coronary artery disease patients (n = 523)

From: Screening for anxiety disorders in patients with coronary artery disease

Cut-off scores N (%) Sensitivity,% (95% CI) Specificity,% (95% CI) PPV,% (95% CI) NPV,% (95% CI) Accuracy,% AUC (95% CI)
Hospital anxiety and depression scale – anxiety subscale
≥ 7 203 (39) 92 (73–99) 64 (60–68) 12 (8–17) 99 (98–100) 65 .85 (.76-.93)
8 148 (28) 92 (73–99) 75 (71–79) 16 (11–23) 99 (98–100) 76
≥ 9 100 (19) 69 (48–85) 84 (80–87) 18 (11–27) 98 (96–99) 83
Spielberger trait anxiety inventory
≥ 44 262 (50) 92 (73–99) 52 (48–57) 9 (6–13) 99 (97–100) 54 .82 (.75-.89)
45 246 (47) 92 (73–99) 55 (51–60) 10 (6–14) 99 (97–100) 57
≥ 46 229 (44) 85 (64–95) 58 (54–63) 10 (6–14) 99 (96–100) 60
Spielberger state anxiety inventory
≥ 39 267 (51) 89 (69–97) 51 (46–55) 9 (6–13) 99 (96–100) 53 .74 (.66-.82)
40 251 (48) 89 (69–97) 54 (50–59) 9 (6–14) 99 (97–100) 56
≥ 41 226 (43) 81 (60–93) 59 (54–63) 9 (6–14) 98 (96–99) 60  
  1. Optimal cut-off value in bold.
  2. AUC - area under the receiver operating curve; CI – confidence interval; NPV- negative predictive value; PPV - positive predictive value.