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| Patient and disease characteristics | |
| Age (years) 1 | 40.10 ± 13.24 (19–69) |
| Male gender (%) | 26 (52.0) |
| Intact colon (%) | 13 (26.0) |
| Previous risk-reducing surgery | 37 (74.0) |
| History of colectomy (%) | 8 (21.62) |
| History of proctocolectomy (%) | 29 (78.38) |
| Age at risk-reducing surgery (years) 1 | 32.38 ± 9.43 (18–56) |
(mean± SD), (min,max)
