Cox proportional hazard regression model using local recurrence as the outcome variable
| Variable | HR (95% CI) | p value |
|---|---|---|
| Group | ||
| High-volume, colorectal* | 1 | |
| High-volume, no subspecialty training | 1.90 (0.77–4.71) | 0.17 |
| Low-volume, no subspecialty training | 1.51 (0.54–4.18) | 0.43 |
| Obstruction | 3.80 (1.26–11.43) | 0.018 |
| Stage | ||
| 1* | 1 | |
| 2 | 2.02 (0.66–6.20) | 0.22 |
| 3 | 2.73 (0.85–8.80) | 0.09 |
| Hospital | ||
| 1* | 1 | |
| 2 | 2.50 (1.02–6.14) | 0.045 |
| 3 | 0.31 (0.07–1.43) | 0.13 |
| 4 | 1.60 (0.41–6.17) | 0.50 |
| 5 | 0.71 (0.09–5.60) | 0.75 |
| 6 | 0.88 (0.11–7.30) | 0.90 |
| LVI/PNI | 1.48 (0.60–3.69) | 0.40 |
CI = confidence interval; HR = hazard ratio; LVI = lymphovascular space invasion; PNI = perineural invasion.
↵* Reference group.