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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