Table 2.
Odds of use of an attempted laparoscopic approach
| Complete case | Multiple imputation | |||
|---|---|---|---|---|
| Odds ratio | P | Odds ratio | P | |
| Age at diagnosis (per 10 years) | 0·99 (0·96, 1·01) | 0·217 | 0·98 (0·96, 1·00) | 0·059 |
| Year of diagnosis | 2·04 (1·97, 2·10) | < 0·001 | 2·06 (2·00, 2·12) | < 0·001 |
| Sex | 0·228 | 0·090 | ||
| M | 1·00 | – | 1·00 | |
| F | 1·03 (0·98, 1·08) | 1·04 (0·99, 1·09) | ||
| Operation type | < 0·001 | < 0·001 | ||
| Elective | 1·00 | 1·00 | ||
| Emergency | 0·14 (0·12, 0·16) | 0·15 (0·13, 0·17) | ||
| Modified Dukes' stage at diagnosis | < 0·001 | < 0·001 | ||
| A | 1·00 | 1·00 | ||
| B | 0·73 (0·68, 0·78) | 0·74 (0·69, 0·79) | ||
| C | 0·66 (0·61, 0·71) | 0·66 (0·62, 0·71) | ||
| ‘D’ | 0·43 (0·39, 0·48) | 0·45 (0·40, 0·50) | ||
| IMD income category | 0·001 | 0·002 | ||
| 1 (most affluent) | 1·00 | 1·00 | ||
| 2 | 0·98 (0·91, 1·05) | 0·96 (0·90, 1·04) | ||
| 3 | 0·97 (0·90, 1·04) | 0·96 (0·89, 1·03) | ||
| 4 | 0·91 (0·84, 0·98) | 0·89 (0·83, 0·97) | ||
| 5 (most deprived) | 0·84 (0·77, 0·92) | 0·85 (0·78, 0·93) | ||
| Cancer site | < 0·001 | < 0·001 | ||
| Colon | 1·00 | 1·00 | ||
| Rectum | 0·72 (0·68, 0·76) | 0·71 (0·67, 0·75) | ||
| Charlson co-morbidity score | < 0·001 | < 0·001 | ||
| 0 | 1·00 | 1·00 | ||
| 1 | 0·77 (0·71, 0·83) | 0·77 (0·72, 0·83) | ||
| 2 | 0·76 (0·67, 0·87) | 0·74 (0·66, 0·84) | ||
| ≥ 3 | 0·68 (0·57, 0·81) | 0·69 (0·58, 0·82) | ||
Values in parentheses are 95 per cent confidence intervals. IMD, Index of Multiple Deprivation.