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Table 2 Univariate and Bivariate analysis of CR-POSSUM factors for operative mortality

From: Validity of the CR-POSSUM model in surgery for colorectal cancer in Spain (CCR-CARESS study) and comparison with other models to predict operative mortality

    Total (N = 2749) In-hospital mortality (N = 41) 30-day mortality (N = 47)
  Weight   N % Col N % Row p-value N % Row p-value
Age 1 <=60 640 23.3 2 0.3 < 0.001 2 0.3 < 0.001
3 61–70 830 30.2 7 0.8 10 1.2
4 71–80 902 32.9 14 1.6 16 1.8
8 > = 81 373 13.6 18 4.8 19 5.1
  missing 4 0.1       
Heart failure 1 None or mild 2487 92.9 31 1.2 < 0.001 36 1.4 < 0.001
2 Moderate 144 5.4 6 4.2 7 4.9
3 Severe 45 1.7 3 6.7 3 6.7
  missing 73 2.7       
Systolic blood pressure (mmHg) 1 100–170 2452 93.1 34 1.4 0.004 39 1.6 0.007
2 > 170 or 90–99 161 6.1 4 2.5 5 3.1
3 < 90 20 0.8 2 10.0 2 10.0
  missing 116 4.2       
Heart rate (beats/min) 1 40–100 2516 96.6 36 1.4 0.186 42 1.7 0.289
2 101–120 76 2.9 3 3.9 3 3.9
3 > 120 or < 40 13 0.5 0 0.0 0 0.0
  missing 144 5.2       
Urea (mmol/l) 1 <=10.0 767 31.1 14 1.8 0.440 15 2.0 0.363
2 10.1–15.0 1005 40.8 12 1.2 15 1.5
3 > 15.0 694 28.1 13 1.9 17 2.4
  missing 283 10.3       
Haemoglobin (g/dl) 1 13.0–16.0 1053 39.1 13 1.2 0.023 12 1.1 0.002
2 10.0–12.9 or 16.1–18.0 1290 47.9 16 1.2 21 1.6
3 < 10.0 or > 18.0 350 13.0 11 3.1 14 4.0
  missing 56 2.0       
Physiological score: in-hospital mortality   mean: std. dev: median: min: max: missing:   
No 10.4 2.6 10.0 6.0 19.0 453   
Yes 12.9 2.9 13.0 6.0 19.0 3   
Operative severity 1 Minor 0 0.0 0 0.0 0.003 0 0.0 < 0.001
3 Moderate 60 2.2 4 6.7 5 8.3
4 Major 1520 55.4 19 1.3 21 1.4
8 Complex major 1164 42.4 18 1.5 21 1.8
  missing 5 0.2       
Peritoneal contamination 1 None or serous fluid 2683 98.0 37 1.4 0.001 42 1.6 < 0.001
2 Local pus 9 0.3 1 11.1 1 11.1
3 Free pus or faeces or blood 46 1.7 3 6.5 4 8.7
  missing 11 0.4       
Operative urgency 1 Scheduled 2649 96.4 34 1.3 < 0.001 38 1.4 < 0.001
3 Urgent 93 3.4 6 6.5 8 8.6
8 Emergency 7 0.3 1 14.3 1 14.3
  missing 0 0.0       
Clinical or pathological cancer staging 1 Dukes’ A-B 1582 57.9 20 1.3 0.484 21 1.3 0.003
2 Dukes’ C 895 32.7 16 1.8 15 1.7
3 Dukes’ D 256 9.4 5 2.0 11 4.3
  missing 16 0.6       
Operative severity score: in-hospital mortality   mean: std. dev: median: min: max: missing:   
No 9.3 2.2 8.0 6.0 20.0 453   
Yes 10.0 2.5 11.0 6.0 16.0 3