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Table 3 The performance of FOCI-T Severity cut-off scores in detecting OCD

From: A study of diagnostic accuracy of the Florida Obsessive-Compulsive Inventory – Thai Version (FOCI-T)

Cut-off score Sensitivity 95 % CI Specificity 95 % CI +LR -LR PPV NPV
Discrimination of OCD from non-OCD and healthy adults
 ≥3 0.97 0.86 – 0.99 0.72 0.65 – 0.79 3.52 0.04 0.46 0.99
 ≥4 0.95 0.82 – 0.99 0.76 0.69 – 0.83 3.96 0.07 0.48 0.98
≥5 * 0.92 0.79 – 0.98 0.82 0.76 – 0.88 5.23 0.10 0.56 0.98
 ≥6 0.84 0.69 – 0.94 0.86 0.80 – 0. 91 6.09 0.18 0.59 0.96
 ≥7 0.82 0.66 – 0.92 0.89 0.83 – 0.94 7.63 0.21 0.64 0.95
 ≥8 0.76 0.60 – 0.89 0.92 0.87 – 0.96 10.11 0.26 0.71 0.94
 ≥9 0.71 0.54 – 0.85 0.96 0.92 – 0.99 18.83 0.30 0.82 0.93
 ≥10 0.61 0.43 – 0.76 0.96 0.92 – 0.99 16.04 0.41 0.79 0.91
Discrimination of OCD from healthy adults
 ≥3 0.97 0.86 – 0.99 0.80 0.72 – 0.87 4.91 0.03 0.62 0.99
 ≥4 0.95 0.82 – 0.99 0.83 0.76 – 0.89 5.78 0.06 0.65 0.98
≥5 * 0.92 0.79 – 0.98 0.88 0.81 – 0.93 7.63 0.09 0.71 0.97
 ≥6 0.84 0.69 – 0.94 0.91 0.85 – 0.96 9.77 0.17 0.76 0.95
 ≥7 0.82 0.66 – 0.92 0.92 0.86 – 0.96 10.51 0.20 0.77 0.94
  1. +LR Positive likelihood ratio, −LR Negative likelihood ratio, PPV Positive predictive value, NPV Negative predictive value. * and bold data Highest area under the ROC curve with a significance level (p=0.0001)