Table A1.
Multivariate analysis (following stepwise regression).
| 95% CI for OR | |||||
|---|---|---|---|---|---|
| n = 13,688 (98% of Cases) | df | p-Value | OR | Lower | Upper |
| Age on Arrival | 1 | 0.000 | 1.022 | 1.014 | 1.031 |
| ln_postoperative P-POSSUM | 1 | 0.000 | 2.173 | 1.885 | 2.505 |
| ASA Score (ref = 1) | 4 | 0.000 | |||
| ASA Score 2 | 1 | 0.726 | 1.243 | 0.368 | 4.195 |
| ASA Score 3 | 1 | 0.068 | 2.967 | 0.922 | 9.547 |
| ASA Score 4 | 1 | 0.002 | 6.246 | 1.936 | 20.145 |
| ASA Score 5 | 1 | 0.000 | 16.254 | 4.827 | 54.734 |
| ln_creatinine | 1 | 0.011 | 1.274 | 1.058 | 1.535 |
| Systolic blood pressure | 1 | 0.000 | 0.992 | 0.988 | 0.997 |
| Glasgow coma score | 1 | 0.001 | 0.942 | 0.910 | 0.975 |
| ln time to theater | 1 | 0.002 | 0.890 | 0.827 | 0.957 |
| Histology (reference = Other) | 7 | 0.000 | |||
| Histology (Crohn’s Disease) | 1 | 0.706 | 0.786 | 0.224 | 2.758 |
| Histology (Diverticulitis) | 1 | 0.074 | 0.629 | 0.378 | 1.047 |
| Histology (Ischemia) | 1 | 0.125 | 0.729 | 0.487 | 1.092 |
| Histology (Malignancy) | 1 | 0.698 | 1.075 | 0.747 | 1.546 |
| Histology (PUD) | 1 | 0.086 | 0.500 | 0.227 | 1.102 |
| Histology (UC) | 1 | 0.260 | 0.309 | 0.040 | 2.388 |
| Histology (NA) | 1 | 0.000 | 0.547 | 0.397 | 0.752 |
| Operative findings; Intestinal ischemia | 1 | 0.029 | 1.451 | 1.039 | 2.026 |
| Operative findings; Perforated Small Bowel | 1 | 0.007 | 1.389 | 1.093 | 1.765 |
| Indication for surgery; Ischemia | 1 | 0.000 | 2.003 | 1.418 | 2.829 |
df: degrees of freedom; p-value: probability value; OR: Odds ratio; PUD: peptic ulcer disease; UC: ulcerative colitis; NA: not available.