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Table 6 Sensitivity and specificity at various cutoff points of the Taiwanese BCIS composite index for cognitive insight

From: Assessing cognitive insight in nonpsychiatric individuals and outpatients with schizophrenia in Taiwan: an investigation using the Beck Cognitive Insight Scale

Score threshold Sensitivity
(%)
Specificity
(%)
Yuden Index n (%) of patients identified at or below cutoff
Schizophrenia (n = 118)     
19 0 100 1.00 118 (100%)
18 0 100 1.00 118 (100%)
17 0.39 99.75 1.00 117 (99.2%)
16 0.99 99.15 1.00 117 (99.2%)
15 1.78 99.15 1.01 117 (99.2%)
14 2.17 98.31 1.00 117 (99.2%)
13 4.73 98.31 1.03 116 (98.3%)
12 8.48 98.31 1.07 116 (98.3%)
11 10.85 97.46 1.08 116 (98.3%)
10 16.57 92.37 1.09 115 (97.5%)
9 22.88 88.98 1.12 109 (92.45)
8 30.97 85.59 1.17 105 (89.0%)
7 40.43 82.2 1.23 101 (85.6%)
6 54.44 77.12 1.32 97 (82.2%)
5 67.26 66.10 1.33 91 (77.1%)
4 77.51 59.32 1.37 78 (66.1%)
3* 87.18 50.85 1.38 70 (59.3%)
2 92.11 37.29 1.29 60 (50.8%)
1 95.86 29.66 1.26 44 (37.3%)
0 98.42 17.80 1.16 35 (29.7%)
-1 99.0 10.17 1.09 21 (17.8%)
-2 99.41 5.93 1.05 12 (10.2%)
-3 99.8 1.69 1.01 7 (5.9%)
-4 99.8 0.85 1.01 2 (1.7%)
-5 99.9 0.65 1.01 1 (0.9%)
-6 100 0 1.00 0 (0%)
  1. *Optimal cutoff point (maximum sensitivity and specificity) shown in bold.