Demographic and surgical characteristics
| Female | Male | |
| Age at treatment (mean (SD)) in years | 35.6 (15.1) | 34.1 (16.2) |
| Sex | 75 | 206 |
| Body Mass Index (mean (SD)) | 26.3 (5.9) | 26.3 (3.8) |
| Average duration of symptoms (mean (SD)) in months | 42.1 (78.7) | 33.0 (65.2) |