Table 3.
Odds ratios and hazard ratios in multivariate model of survival
| Relative odds of death (95% CI)* | P value | Multilevel model† | P value | Relative hazard (95% CI)‡ | P value | |
|---|---|---|---|---|---|---|
| Type of procedure (base=elective and curative intent) | <0.0001 | <0.0001 | <0.0001 | |||
| Elective and palliative | 4.26 (3.35 to 5.41) | <0.0001 | 4.26 (3.35 to 5.42) | <0.0001 | 2.59 (2.25 to 2.97) | <0.0001 |
| Emergency and curative | 1.52 (1.13 to 2.04) | 0.006 | 1.51 (1.12 to 2.03) | 0.007 | 1.36 (1.12 to 1.65) | 0.002 |
| Emergency and palliative | 5.68 (3.88 to 8.30) | <0.0001 | 5.65 (3.87 to 8.27) | <0.0001 | 3.27 (2.69 to 3.98) | <0.0001 |
| Not known | 1.09 (0.78 to 1.54) | 0.61 | 1.10 (0.78 to 1.54) | 0.60 | 1.15 (0.92 to 1.44) | 0.21 |
| Liver clear (base=yes) | 0.004 | 0.004 | 0.008 | |||
| No v yes | 1.60 (1.18 to 2.17) | 0.002 | 1.61 (1.19 to2.18) | 0.002 | 1.31 (1.1 to 1.55) | 0.002 |
| Not known | 1.29 (0.97 to 1.73) | 0.08 | 1.30 (0.97 to 1.74) | 0.08 | 1.01 (0.84 to 1.21) | 0.93 |
| Age (per year) | 1.27 (1.18 to 1.37) | <0.0001 | 1.27 (1.18 to 1.37) | <0.0001 | 1.18 (1.13 to 1.24) | <0.0001 |
| Duke’s stage (base=A) | <0.0001 | <0.0001 | <0.0001 | |||
| B v A | 1.52 (0.77 to 3.04) | 0.23 | 1.51 (0.76 to 3.01) | 0.24 | 1.41 (0.9 to 2.22) | 0.14 |
| C v A | 2.94 (1.46 to 5.9) | 0.002 | 2.92 (1.45 to 5.87) | 0.003 | 2.28 (1.44 to 3.61) | 0.0001 |
| D v A | 4.48 (2.17 to 9.27) | 0.0001 | 4.45 (2.15 to 9.2) | 0.0001 | 2.64 (1.64 to 4.23) | 0.0001 |
| Not known | 3.63 (1.58 to 8.32) | 0.002 | 3.58 (1.56 to 8.24) | 0.003 | 2.68 (1.57 to 4.57) | 0.0001 |
| Tumour differentiation (base=well differentiated) | 0.0001 | 0.0001 | 0.004 | |||
| Moderate v well differentiated | 1.07 (0.77 to 1.48) | 0.70 | 1.07 (0.77 to 1.48) | 0.70 | 1.02 (0.84 to 1.23) | 0.88 |
| Poor v well differentiated | 1.80 (1.23 to 2.64) | 0.003 | 1.82 (1.24 to 2.66) | 0.002 | 1.31 (1.05 to 1.65) | 0.02 |
| Not known v well differentiated | 1.26 (0.71 to 2.25) | 0.43 | 1.27 (0.71 to 2.27) | 0.42 | 1.06 (0.75 to 1.51) | 0.74 |
| Hospital workload (per year; Q1 ⩽23 years) | 0.01 | 0.02 | 0.002 | |||
| (24-32) Q2 v Q1 | 0.93 (0.7 to 1.25) | 0.65 | 0.93 (0.69 to 1.26) | 0.66 | 0.89 (0.74 to 1.06) | 0.19 |
| (33-46) Q3 v Q1 | 1.47 (1.04 to 2.08) | 0.03 | 1.48 (1.03 to 2.13) | 0.03 | 1.14 (0.92 to 1.4) | 0.23 |
| (47-54) Q4 v Q1 | 1.53 (1.11 to 2.12) | 0.01 | 1.52 (1.08 to 2.13) | 0.02 | 1.29 (1.07 to 1.57) | 0.01 |
| (⩾55) Q5 v Q1 | 1.18 (0.86 to 1.63) | 0.30 | 1.18 (0.83 to 1.68) | 0.35 | 1.05 (0.87 to 1.27) | 0.59 |
| Consultant experience (years; Q1 ⩽13 years) | 0.45 | 0.46 | 0.70 | |||
| (14-17) Q2 v Q1 | 1.09 (0.81 to 1.48) | 0.55 | 1.10 (0.8 to 1.52) | 0.56 | 1.09 (0.91 to 1.31) | 0.36 |
| (18-22) Q3 v Q1 | 0.88 (0.64 to 1.22) | 0.44 | 0.88 (0.63 to 1.24) | 0.47 | 0.99 (0.81 to 1.21) | 0.93 |
| (23-30) Q4 v Q1 | 1.09 (0.78 to 1.52) | 0.62 | 1.07 (0.75 to 1.53) | 0.70 | 1.08 (0.88 to 1.32) | 0.48 |
| (⩾31) Q5 v Q1 | 1.05 (0.75 to 1.47) | 0.77 | 1.06 (0.75 to 1.51) | 0.73 | 1.07 (0.87 to 1.31) | 0.53 |
| Not known v Q1 | 1.50 (0.87 to 2.6) | 0.14 | 1.54 (0.88 to 2.72) | 0.13 | 1.27 (0.9 to 1.8) | 0.18 |
| Consultant workload (per year; Q1 ⩽9.7 years) | 0.65 | 0.70 | 0.35 | |||
| (9.8-12.7) Q2 v Q1 | 1.15 (0.87 to 1.52) | 0.33 | 1.14 (0.85 to 1.53) | 0.37 | 1.03 (0.87 to 1.22) | 0.71 |
| (12.8-16.1) Q3 v Q1 | 0.97 (0.73 to 1.29) | 0.84 | 0.97 (0.72 to 1.3) | 0.82 | 1.01 (0.85 to 1.2) | 0.93 |
| (16.2-24.9) Q4 v Q1 | 1.13 (0.83 to 1.55) | 0.44 | 1.13 (0.81 to 1.57) | 0.47 | 1.10 (0.91 to 1.34) | 0.31 |
| (⩾25.0) Q5 v Q1 | 0.92 (0.66 to 1.27) | 0.59 | 0.91 (0.65 to 1.29) | 0.60 | 0.88 (0.73 to 1.07) | 0.21 |
| Not known v Q1 | 0.63 (0.16 to 2.44) | 0.50 | 0.61 (0.16 to 2.38) | 0.48 | 0.95 (0.41 to 2.18) | 0.90 |
*
Ordinary logistic regression model. †Multilevel logistic regression. ‡Cox’s proportional hazards model.