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Table 4 Various IPDS combinations with their cut-off scores and their sensitivity, specificity, predictive value of positive test (PVP) and predictive value of negative test (PVN) as well as proportion of cases correctly classified

From: A cross-sectional testing of The Iowa Personality Disorder Screen in a psychiatric outpatient setting

IPDS item combinations Cut-off score Sensitivity Specificity PVP PVN Correctly Classified
1 - 11 3 0.89 0.57 0.76 0.68 0.73
  4 0.77 0.71 0.73 0.75 0.74
  5 0.68 0.9 0.88 0.74 0.79
1 - 6 2 0.95 0.58 0.7 0.91 0.77
  3 0.69 0.81 0.78 0.72 0.74
  4 0.43 0.94 0.89 0.62 0.68
4 - 8 2 0.82 0.74 0.76 0.8 0.78
  3 0.62 0.9 0.87 0.7 0.76
  4 0.34 0.99 0.96 0.6 0.66
1, 3 - 8 2 0.96 0.53 0.67 0.93 0.74
  3 0.73 0.75 0.75 0.73 0.74
  4 0.59 0.92 0.88 0.69 0.75
1, 4-6, 9 2 0.93 0.6 0.7 0.9 0.77
  3 0.71 0.8 0.78 0.73 0.75
  4 0.48 0.94 0.9 0.64 0.71