Table 2.
Factors associated with diverting ileostomy formation – univariate and multivariable logistic regression
| Variable | Univariate | Multivariable | ||
|---|---|---|---|---|
| OR (95% CI) | p | Adjusted OR (95% CI) |
p | |
| Age at surgery, years | 1.03 (1.0 – 1.06) | .05 | 1.03 (0.99 – 1.07) | .14 |
| BMI, kg/m2 | 0.96 (0.90 – 1.02) | .18 | ||
| Current smoker | ||||
| No | Referent | -- | ||
| Yes | 1.16 (0.33 – 4.14) | .82 | ||
| Former smoker | ||||
| No | Referent | -- | ||
| Yes | 1.06 (0.55 – 2.03) | .86 | ||
| Hypertension | ||||
| No | Referent | -- | ||
| Yes | 0.85 (0.42 – 1.69) | .64 | ||
| Diabetes | ||||
| No | Referent | -- | Referent | -- |
| Yes | 3.62 (1.28 – 10.21) |
.02 | 2.53 (0.76 – 8.40) | .13 |
| Coronary artery disease | ||||
| No | Referent | -- | Referent | -- |
| Yes | 6.93 (1.35 – 35.48) |
.02 | 3.10 (0.47 – 20.39) | .24 |
| AACCI group | ||||
| Low (score 0–1) | Referent | -- | ||
| Intermediate (score 2–3) | 1.53 (0.77 – 3.04) | .22 | ||
| High (score ≥ 4) | 1.09 (0.34 – 3.53) | .88 | ||
| Preoperative hemoglobin, g/dL | 0.80 (0.63 – 1.02) | .07 | 0.80 (0.61 – 1.07) | .13 |
| Preoperative albumin, g/dL | 1.16 (0.55 – 2.43) | .70 | ||
| Ascites, L | 0.97 (0.84 – 1.12) | .67 | ||
| Estimated blood loss, L | 1.46 (1.13 – 1.89) | <.01 | 1.07 (0.71 – 1.61) | .76 |
| Total intraoperative IV fluids, La | 1.09 (1.01 – 1.17) | .02 | ||
| Operative time, h | 1.33 (1.15 – 1.53) | <.01 | 1.21 (1.03 – 1.42) | .02 |
| Intraoperative complication | ||||
| No | Referent | -- | Referent | -- |
| Yes | 2.07 (0.99 – 4.33) | .05 | 0.82 (0.29 – 2.30) | .70 |
| Colon resection, non- rectosigmoid/descending |
||||
| No | Referent | -- | ||
| Yes | 1.30 (0.68 – 2.48) | .44 | ||
| Rectosigmoid/descending colon resectiona |
||||
| No | Referent | -- | ||
| Yes | 8.42 (1.13 – 62.67) |
.04 | ||
| Total number of colon resectionsa | ||||
| 1 | Referent | -- | ||
| 2 or more | 2.49 (1.27 – 4.87) | <.01 | ||
| Length of rectosigmoid and descending colon resection, cm |
1.05 (1.02 – 1.08) | <.01 | 1.04 (1.01 – 1.08) | .02 |
| Total length of colon resection, cm | 1.02 (1.00 – 1.04) | .01 | 1.00 (0.98 – 1.02) | .68 |
| Surgeonb | NS | NS | ||
BMI, body mass index; AACCI, Age-Adjusted Charlson Comorbidity Index; NS, non significant
a
Not included in multivariable analysis due to collinearity/confounding
b
Individual attending surgeons not listed, however OR was non significant for all 10 surgeons (range p=.12 to .99)