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Demographic characteristics of the control patients.
| All | Urologic or Digestive Surgery | Orthopaedic Surgery | Caesarean Section | |
|---|---|---|---|---|
| Number (%) | 30 (100) | 11 (36.6) | 2 (6.7) | 17 (56.7) |
| Male | 9 (30) | 9 (81.8) | 0 | 0 |
| Mean age, years (SD) | 53.4 (22.5) | 77.4 (7.5) | 81 (1.4) | 34.7 (4.1) |
