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Table 4 Performance characteristics of the risk score in our cohort (N = 5,137)

From: Evaluation of a clinical risk index for advanced colorectal neoplasia among a North American population of screening age

Risk Score Persons AN (n) Percent Sensitivity (%) Specificity (%) PPV NPV
1 637 23 3.61 100.00 0.00 6.83 --
2 738 27 3.66 93.45 12.83 7.29 96.39
3 1493 79 5.29 85.75 27.68 8.00 96.36
4 1039 88 8.47 63.25 57.23 9.78 95.50
5 898 93 10.36 38.18 77.10 10.89 94.45
6 298 39 13.09 11.68 93.92 12.35 93.55
7 & 8a 34 2 5.88 0.57 99.33 5.88 93.16
Total 5,137 351 6.83
  1. aDue to small sample risk scores 7 and 8 are presented in one row