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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: J Anxiety Disord. 2012 Nov 23;27(1):125–130. doi: 10.1016/j.janxdis.2012.11.001

Table 4.

Sensitivity, Specificity, Positive Predictive Value (PPV), and Negative Predictive Value (NPV) for Central Ranges of Participant and Collateral scores on the GAI and PSWQ-A predicting Any Anxiety Diagnosis (N = 41)

GAI - Participants
Cutoff ≥ 4 5 6 7 8a 9 10 11 12 13 14
Sensitivity 0.62 0.62 0.62 0.58 0.58 0.42 0.38 0.38 0.45 0.23 0.15
Specificity 0.60 0.67 0.73 0.93 0.93 0.93 0.93 1.00 1.00 1.00 1.00
PPV 0.73 0.76 0.80 0.94 0.94 0.92 0.91 1.00 1.00 1.00 1.00
NPV 0.47 0.50 0.52 0.56 0.56 0.48 0.47 0.48 0.47 0.43 0.41
GAI – Collaterals
Cutoff ≥ 4 5 6 7 8 9 10a 11 12 13 14
Sensitivity 0.92 0.92 0.77 0.73 0.69 0.62 0.62 0.58 0.38 0.35 0.31
Specificity 0.43 0.57 0.64 0.64 0.79 0.86 0.93 0.93 0.93 0.93 0.93
PPV 0.75 0.80 0.80 0.83 0.86 0.89 0.94 0.94 0.91 0.90 0.89
NPV 0.75 0.80 0.60 0.59 0.58 0.55 0.57 0.54 0.45 0.43 0.42
PSWQ-A- Participants
Cutoff ≥ 13 14 15 16 17a 18 19 20 21 22 23
Sensitivity 0.77 0.73 0.73 0.65 0.62 0.58 0.50 0.46 0.46 0.46 0.34
Specificity 0.33 0.47 0.60 0.60 0.73 0.73 0.73 0.73 0.73 0.80 0.93
PPV 0.67 0.70 0.76 0.74 0.80 0.79 0.76 0.75 0.75 0.80 0.90
NPV 0.45 0.50 0.56 0.50 0.52 0.50 0.46 0.44 0.44 0.46 0.45
PSWQ-A – Collaterals
Cutoff ≥ 13 14 15 16 17 18 19 20 21 22a 23
Sensitivity 0.92 0.92 0.92 0.88 0.88 0.88 0.85 0.85 0.81 0.81 0.69
Specificity 0.20 0.20 0.47 0.47 0.47 0.53 0.53 0.60 0.73 0.73 0.73
PPV 0.67 0.67 0.75 0.74 0.74 0.77 0.76 0.79 0.84 0.84 0.82
NPV 0.60 0.60 0.78 0.70 0.70 0.73 0.67 0.69 0.69 0.69 0.58
a

Cut-off that maximizes the sum of sensitivity and specify.

GAI = Geriatric Anxiety Inventory; PSWQ-A = Penn State Worry Questionniare; PPV = positive predictive value; NPV = negative predictive value