Table 2 Results: Patients'demographics, fistulas and surgical data
From: Obesity is a negative predictor of success after surgery for complex anal fistula
Variable | BMI < 30 | BMI ≥ 30 |
|---|---|---|
No. of patients | 152 | 68 |
Mean age (years) | 39 (21-76) | 39 (18-64) |
Tertiary referral (%) | 46 (30%) | 22 (32%) |
Previous fistula surgery prior to advancement flap | Â | Â |
0 | 118 (78%) | 40 (58%) |
1 | 12 (8%) | 11 (16%) |
2 | 10 (6%) | 9 (13%) |
3 or more | 12 (8%) | 8 (13%) |
Fistula type | Â | Â |
transsphincteric | 96 (63%) | 45 (66%) |
intersphincteric | 50 (33%) | 19 (28%) |
suprasphincteric | 6 (4%) | 4 (6%) |
Fistula location | Â | Â |
anterior | 32 (21%) | 10 (15%) |
posterior | 120 (79%) | 58 (85%) |
Horse-shoe-fistula (%) | 6 (4%) | 5 (7%) |
Seton drainage (%) | 132 (87%) | 58 (85%) |
Co-morbidity (cardiovascular, diabetes) | 30 (20%) | 30 (44%) |
Co-morbidity (smoking) | 50 (33%) | 25 (37%) |
Advancement flap repair (%) | 108 (71%) | 47 (69%) |
Mean operative time (min) | 20 (12-32) | 24 (18-40) |
Morbidity (%) | 3 (2%) | 3 (4%) |