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Table 2 Optimal SRQ-20 cut-off for detection of common mental disorder and associated validity coefficients

From: Performance of primary health care workers in detection of mental disorders comorbid with epilepsy in rural Ethiopia

SRQ-20 Cut off Prevalence of common mental disorder Sensitivity (%) Specificity (%) Positive predictive value Negative predictive value % correctly classified Youden’s index
≥7 49.6% 90.0 54.4 16.2 98.2 57.6 0.44
≥8 46.0% 75.0 56.9 14.6 95.9 58.5 0.32
≥9 41.5% 70.0 61.3 15.1 95.4 62.1 0.31
≥10 36.2% 65.0 66.8 16.0 95.1 66.5 0.32