Univariate and multivariate logistic regression of factors associated with elective laparoscopic colectomy for colon cancer
| Variable | OR* (95% CI) | |
|---|---|---|
| Univariate | Multivariate | |
| Year (2014/15 relative to 2004/05) | 7.55 (7.12–8.00) | 9.31 (8.60–10.09) |
| Female sex (reference) | 1.00 | 1.00 |
| Male sex | 0.92 (0.88–0.95) | 0.94 (0.90–0.98) |
| Age, yr | ||
| 66–80 (reference) | 1.00 | 1.00 |
| 18–50 | 1.19 (1.11–1.28) | 1.15 (1.07–1.24) |
| 51–65 | 1.11 (1.06–1.15) | 1.14 (1.09–1.19) |
| > 80 | 0.93 (0.89–0.98) | 0.87 (0.83–0.92) |
| Province | ||
| Ontario (reference) | 1.00 | 1.00 |
| Newfoundland and Labrador | 0.12 (0.10–0.14) | 0.14 (0.12–0.16) |
| New Brunswick | 0.15 (0.13–0.17) | 0.16 (0.14–0.19) |
| Prince Edward Island | 0.14 (0.11–0.20) | 0.23 (0.17–0.32) |
| Manitoba | 0.36 (0.33–0.39) | 0.39 (0.36–0.43) |
| Saskatchewan | 0.42 (0.38–0.46) | 0.54 (0.49–0.60) |
| Nova Scotia | 0.44 (0.40–0.48) | 0.53 (0.48–0.59) |
| Alberta | 0.64 (0.60–0.67) | 0.57 (0.53–0.60) |
| British Columbia | 0.86 (0.82–0.90) | 0.89 (0.85–0.93) |
| Residence | ||
| Rural (reference) | 1.00 | 1.00 |
| Urban | 1.68 (1.61–1.76) | 1.24 (1.18–1.30) |
| Elixhauser Comorbidity Index score | ||
| 0 (reference) | 1.00 | 1.00 |
| 1–3 | 0.88 (0.85–0.92) | 0.90 (0.87–0.94) |
| 4–8 | 0.76 (0.61–0.94) | 0.79 (0.63–0.98) |
| Hospital volume | ||
| Low (reference) | 1.0 | 1.00 |
| High | 2.44 (2.35–2.54) | 2.04 (1.96–2.13) |
| Surgeon volume | ||
| Low (reference) | 1.00 | 1.00 |
| High | 1.65 (1.59–1.71) | 1.29 (1.24–1.35) |
| Resection type | ||
| Right (reference) | 1.00 | 1.00 |
| Left | 0.97 (0.93–1.01) | 0.91 (0.87–0.95) |
| Anterior | 0.75 (0.70–0.81) | 0.58 (0.55–0.62) |
| Other | 0.66 (0.63–0.70) | 0.71 (0.66–0.76) |
Note: CI = confidence interval, OR = odds ratio.
↵* Adjusted for all other variables included in the model in multivariate analysis.