Table 2.
Univariate and Bivariate analysis of CR-POSSUM factors for 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 | ||||