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Table 6 Operative risk categories with corresponding cumulative risk score for 90-day In-Hospital Mortality after cardiac surgery for the risk groups calculated from the roc curve, cumulative risk score*

From: Erratum to: Development of the Post Cardiac Surgery (POCAS) prognostic score

Risk score Observed no. Predicted no. % probability (95 % CI) 90-Day In-Hospital Mortality (%) Operative risk categories % probability (95 % CI)
<75 1 1 0.92 (0.89–0.95) 0.4 Low 2.33 (2.19–2.46)
75–81 3 3 2.10 (2.03–2.16) 1.5
82–90 11 11 4.82 (4.62–5.02) 6.1
91–100 12 12 12.99 (12.34–13.65) 11.1 Medium 16.32 (15.25–17.38)
101–105 11 10 25.53 (24.40–26.66) 28.2
106–128 29 28 56.22 (51.86–60.58) 55.8 High 56.22 (51.86–60.58)
>128 13 13 94.98 (92.75–97.21) 100.0 Very high 94.98 (92.75–97.21)
  1. CI confidence interval, n number