| Unadjusted analysis | Adjusted model* | ||||||
---|---|---|---|---|---|---|---|---|
 | OR | 95% CI | p | OR | 95% CI | p | ||
Hospital case volume (vs. high) | Â | Â | Â | Â | Â | Â | Â | Â |
Very low | 2.69 | 1.13 | 6.40 | 0.03 | 2.70 | 1.12 | 6.55 | 0.03 |
Low | 2.51 | 1.06 | 5.95 | 0.04 | 2.40 | 0.99 | 5.83 | 0.05 |
Medium | 1.51 | 0.60 | 3.81 | 0.38 | 1.31 | 0.49 | 3.49 | 0.59 |
Age (year) | Â | 1.02 | 1.00 | 1.05 | 0.10 | |||
Female (vs. male) | Â | 0.66 | 0.37 | 1.20 | 0.18 | |||
CCI | Â | 1.30 | 1.14 | 1.48 | <.001 |