Table 2 Validity coefficients of the Simpson-Angus Scale (SAS) mean score at different cutoff values. The optimal cut-off point range is presented in bold text.
From: Validity of Simpson-Angus Scale (SAS) in a naturalistic schizophrenia population
SAS mean cut-off | 0.25 | 0.35 | 0.45 | 0.55 | 0.65 | 0.75 | 0.85 | 0.95 | 1.05 | 1.15 |
Sensitivity | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.96 | 0.87 | 0.78 | 0.70 | 0.52 |
Specificity | 0.17 | 0.36 | 0.45 | 0.49 | 0.62 | 0.74 | 0.86 | 0.86 | 0.89 | 0.93 |
Positive Predictive Value | 0.27 | 0.32 | 0.35 | 0.37 | 0.44 | 0.96 | 0.65 | 0.64 | 0.67 | 0.71 |
Negative Predictive Value | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 0.98 | 0.96 | 0.93 | 0.91 | 0.87 |