Table 3.
Predictors of prolonged (> 7 d) hospital stay after an index amputation
| Characteristic | OR | 95% CI | p value |
|---|---|---|---|
| Type of surgeon | |||
| Vascular surgeon | Reference category | ||
| Orthopedic surgeon | 1.14 | 0.96–1.36 | 0.14 |
| General surgeon | 1.51 | 1.21–1.87 | < 0.001 |
| Other surgeon | 0.96 | 0.59–1.57 | 0.88 |
| Female sex | 0.97 | 0.83–1.12 | 0.64 |
| Community (v. teaching) hospital | 0.98 | 0.83–1.16 | 0.83 |
| Age | 1 | 0.99–1.00 | 0.64 |
| Province or territory | |||
| Ontario | Reference category | ||
| Newfoundland and Labrador | 3.50 | 1.99–6.15 | < 0.001 |
| Prince Edward Island | 1.19 | 0.44–3.18 | 0.73 |
| Nova Scotia | 1.18 | 0.86–1.64 | 0.31 |
| New Brunswick | 1.83 | 1.12–2.99 | 0.020 |
| Manitoba | 0.78 | 0.60–1.02 | 0.07 |
| Saskatchewan | 0.51 | 0.38–0.70 | < 0.001 |
| Alberta | 1.09 | 0.84–1.42 | 0.53 |
| British Columbia | 1.62 | 1.25–2.08 | < 0.001 |
| Northern territories | 0.34 | 0.06–1.96 | 0.22 |
| Type of amputation | |||
| Below-knee | Reference category | ||
| Above-knee | 0.71 | 0.61–0.83 | < 0.001 |
| Foot | 4.62 | 0.57–37.30 | 0.15 |
| Cardiovascular risk factors | |||
| Diabetes | 1.39 | 1.02–1.90 | 0.039 |
| Hypertension | 1.34 | 1.13–1.58 | < 0.001 |
| Ischemic heart disease | 1.54 | 1.24–1.91 | < 0.001 |
| Congestive heart failure | 2.60 | 1.86–3.63 | < 0.001 |
| Hyperlipidemia | 2.10 | 1.33–3.34 | 0.002 |
| Reamputation on same admission | 10.50 | 5.16–21.35 | < 0.001 |
CI = confidence interval; OR = odds ratio.