Table 5.
Uni- and multi-variate analysis for the association of OR, LR, and CONV with different timings of CONV on complicated course and mortality
| Odds ratio (CI) | Odds ratio (CI) | Odds ratio (CI) | |
|---|---|---|---|
| Univariate | Multivariate | Multivariate** | |
| Colon^* | |||
| Postoperative complicated course | |||
| OR | Ref | Ref | Ref |
| LR | 0.566 (0.522–0.614) | 0.668 (0.613–0.727) | 0.706 (0.646–0.770) |
| CONV | 1.428 (1.254–1.626) | 1.423 (1.244–1.628) | 1.486 (1.298–1.702) |
| Early conversion | 1.319 (1.131–1.537) | 1.292 (1.102–1.513) | 1.352 (1.153–1.586) |
| Late conversion | 1.685 (1.371–2.070) | 1.746 (1.412–2.160) | 1.814 (1.465–2.245) |
| Late vs. early | 1.278 (1.004–1.626) | 1.352 (1.055–1.732) | 1.341 (1.046–1.719) |
| Mortality (in-hospital or < 30 days) | |||
| OR | Ref | Ref | Ref |
| LR | 0.413 (0.342–0.499) | 0.589 (0.483–0.719) | 0.680 (0.555–0.835) |
| CONV | 0.779 (0.562–1.080) | 0.853 (0.609–1.195) | 0.954 (0.679–1.340) |
| Early conversion | 0.691 (0.462–1.035) | 0.725 (0.480–1.096) | 0.806 (0.532–1.223) |
| Late conversion | 0.976 (0.592–1.611) | 1.183 (0.707–1.982) | 1.341 (0.798–2.254) |
| Late vs. early | 1.413 (0.763–2.615) | 1.632 (0.869–3.063) | 1.653 (0.884–3.129) |
| Rectum ^# | |||
| Postoperative complicated course | |||
| OR | Ref | Ref | Ref |
| LR | 0.656 (0.594–0.724) | 0.719 (647–0.799) | 0.749 (0.671–0.837) |
| CONV | 1.194 (1.009–1.413) | 1.080 (0.904–1.290) | 1.118 (0.935–1.338) |
| Early conversion | 1.064 (0.848–1.335) | 0.977 (0.770–1.239) | 1.015 (0.799–1.289) |
| Late conversion | 1.343 (1.073–1.679) | 1.196 (0.956–1.512) | 1.233 (0.974–1.561) |
| Late vs. early | 1.262 (0.936–1.7) | 1.224 (0.898–1.669) | 1.215 (0.891–1.657) |
| Mortality (in-hospital or < 30 days) | |||
| OR | Ref | Ref | Ref |
| LR | 0.482 (0.355–0.655) | 0.613 (0.440–0.855) | 0.784 (0.552–1.114) |
| CONV | 0.914 (0.551–1.516) | 0.880 (0.505–1.533) | 1.084 (0.596–1.843) |
| Early conversion | 0.647 (0.297–1.411) | 0.546 (0.231–1.292) | 0.666 (0.279–1.591) |
| Late conversion | 1.203 (0.650–2.226) | 1.305 (0.669–2.547) | 1.504 (0.765–2.956) |
| Late vs. early | 1.858 (0.724–4.765) | 2.391 (0.855–6.682) | 2.259 (0.803–6.352) |
Bold values indicate statistically significant
OR open resection, LR laparoscopic resection, CONV laparoscopic conversion
*Added for the colon: location of tumor
**Year of operation
^The following factors were included in the multivariable model to correct for differences in casemix between patients; sex, age, ASA, Charlson Comorbidity Score, BMI, previous abdominal surgery, pre-operative tumor complications, pT-classification
#Added for the rectum: received radiotherapy (non, short course or chemoradiation), procedure (LAR, APR, or different), cT-classification, tumor distance from anal verge