| Complication, number (percentage) | No complication, number (percentage) | Risk ratio (95% confidence interval) | P value |
---|---|---|---|---|
Red blood | Â | Â | Â | Â |
   Present | 15 (27) | 40 (73) | 4.53 (2.04, 10.07) | 0.0001 |
   Not present | 8 (6) | 125 (94) |  |  |
Low systolic blood pressure | Â | Â | Â | Â |
   Present | 3 (13) | 20 (87) | 1.06 (0.34, 3.28) | 0.92 |
   Not present | 20 (12) | 142 (88) |  |  |
Elevated prothrombin time | Â | Â | Â | Â |
   Present | 7 (33) | 14 (67) | 3.27 (1.53, 7.01) | 0.003 |
   Not present | 16 (10) | 141 (90) |  |  |
Erratic mental status | Â | Â | Â | Â |
   Present | 3 (16) | 16 (84) | 1.28 (0.51, 3.22) | 0.62 |
   Not present | 20 (12) | 149 (88) |  |  |
Unstable comorbid disease | Â | Â | Â | Â |
   Present | 2 (17) | 10 (83) | 1.39 (0.37, 5.23) | 0.63 |
   Not present | 21 (12) | 154 (88) |  |  |