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Surgical specialty of 395 randomised controlled trials included in study
| Surgical specialty | No (%) of trials |
|---|---|
| Gastrointestinal surgery | 92 (23) |
| Trauma and orthopaedics | 91 (23) |
| Ophthalmology | 52 (13) |
| Cardiothoracic surgery | 51 (13) |
| Gynaecology | 30 (8) |
| Urology | 18 (5) |
| Breast surgery | 14 (4) |
| Vascular surgery | 11 (3) |
| Neurosurgery | 10 (3) |
| Otolaryngology | 5 (1) |
| Plastic surgery | 5 (1) |
| Oral and maxillofacial surgery | 4 (1) |
| Other | 12 (3) |
