Table 6.
Cox proportional hazard regression model using disease-specific survival as the outcome variable
| Variable | HR (95% CI) | p value |
|---|---|---|
| Group | ||
| High-volume, colorectal* | 1 | |
| High-volume, no subspecialty training | 3.14 (1.73–5.72) | 0.002 |
| Low-volume, no subspecialty training | 2.19 (1.13–4.21) | 0.019 |
| Obstruction | 3.09 (1.51–6.32) | 0.002 |
| Stage | ||
| 1* | 1 | |
| 2 | 3.68 (1.42–9.49) | 0.007 |
| 3 | 9.04 (3.53–23.10) | < 0.001 |
| Hospital | ||
| 1* | 1 | |
| 2 | 2.12 (1.21–3.73) | 0.009 |
| 3 | 0.44 (0.21–0.93) | 0.032 |
| 4 | 1.29 (0.52–3.15) | 0.58 |
| 5 | 0.47 (0.11–1.95) | 0.30 |
| 6 | 0.50 (0.12–2.17) | 0.36 |
CI = confidence interval; HR = hazard ratio.
*
Reference group.