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Table 6 Calibration power of POSSUM score for predicting postoperative morbidity

From: Evaluation of the POSSUM, P-POSSUM and E-PASS scores in the surgical treatment of hilar cholangiocarcinoma

  POSSUM P-POSSUM E-PASS
Risk band E O E O E O
1 0 0 0 0 1 0
2 0 0 1 0 0 0
3 0 0 0 0 0 0
4 0 0 0 0 1 1
5 0 0 1 1 1 1
6 0 1 1 1 1 1
7 1 2 1 1 1 2
8 1 0 1 1 2 3
9 2 3 2 3 3 2
10 5 4 4 3 - -
Total 9 10 10 10 10 10
  1. POSSUM: Physiological and Operative Severity Score for the enUmeration of Mortality and morbidity; P-POSSUM: Portsmouth modification of POSSUM; E-PASS: Estimation of physiologic ability and surgical stress; E: expected; O: observed.