Between-group differences in complications
| Complication | Absolute number of events | |
|---|---|---|
| Control group (n=99) | Test group (n=101) | |
| Wound infection | 3 | 1 |
| Pulmonary embolus | 2 | 0 |
| Pneumonia | 12 | 9 |
| Urinary tract infection | 6 | 5 |
| Blood transfusion | 2 | 0 |
| Cerebrovascular accident | 1 | 0 |
| Myocardial infarction | 1 | 0 |
| Deep vein thrombosis | 2 | 2 |
| Death | 23 | 20 |
Events are not mutually exclusive.