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. Author manuscript; available in PMC: 2009 Dec 1.
Published in final edited form as: J Geriatr Psychiatry Neurol. 2008 Dec;21(4):223–231. doi: 10.1177/0891988708324936

Table 2.

PSWQ and PSWQ-A: Sensitivity, Specificity, Positive Predictive Values, and Negative Predictive Values

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.