Table 5

Effect of different cut off scores on sensitivity and specificity, likelihood ratios for positive (LR+) and negative (LR−) test results, and posterior probabilities of the disorder following positive and negative test results of the DASS-Depression and DASS-Anxiety scales

Cut off pointSensitivitySpecificityLR+LR−Posterior probability after positive testPosterior probability after negative test
DASS-Depression
    80.950.311.380.160.290.05
    90.950.351.460.140.300.04
    100.910.401.520.230.310.06
    110.910.441.630.200.330.06
    12 0.91 0.46 1.69 0.20 0.33 0.06
    130.910.501.820.180.350.05
    140.860.561.950.250.370.07
    150.840.582.000.280.380.08
    160.810.622.130.280.390.09
DASS-Anxiety
    210.191.2300.250
    30.950.261.280.190.250.05
    40.920.351.420.230.270.06
    5 0.92 0.40 1.53 0.20 0.29 0.05
    60.840.441.500.360.290.09
    70.780.511.590.430.300.10
    80.760.541.650.440.310.11