Table 2.
PSWQ Cut point = 50 |
PSWQ-A Cut point = 22 |
Totals | |||
---|---|---|---|---|---|
GAD present | GAD absent | GAD present | GAD absent | ||
SCID Dx (%) | |||||
GAD present (%) | 86 (45) | 24 (13) | 87 (46) | 23 (12) | N = 110 (58) |
GAD absent (%) | 24 (13) | 57 (29) | 30 (15) | 51 (27) | N = 81 (42) |
Totals (%) | 110 (58) | 81 (42) | 117 (61) | 74 (39) | N = 191 (100) |
Sensitivity (%) | 78 | 79 | |||
Specificity (%) | 70 | 63 | |||
Positive predictive value (%) | 78 | 74 | |||
Negative predictive value (%) | 70 | 69 | |||
Correctly classified (%) | 143 (75) | 138 (72) | |||
Kappa reliabilities between questionnaire cutoff method and SCID (%) | Kappa = .48 | Kappa = .43 |
Abbreviations: Dx, diagnosis; GAD, generalized anxiety disorder; PSWQ, Penn State Worry Questionnaire; PSWQ-A, Penn State Worry Questionnaire-Abbreviated; SCID, Structured Clinical Interview for Diagnosis.