Table 3.
Association of clinical findings with significant contribution of MRI on surgical management
| Impact of MRI on the operation | |||||
|---|---|---|---|---|---|
| No effect n (%) |
Significant n (%) |
Total n (%) |
P | ||
| SPTF classification | Simple | 54 (94.7) | 3 (5.3) | 57 (100) | <0.001 |
| Complex | 36 (45.6) | 43 (54.4) | 79 (100) | ||
|
| |||||
| Parks classification | Grade 1 | 55 (94.8) | 3 (5.2) | 58 (100) | <0.001a |
| Grade 2 | 33 (52.4) | 30 (47.6) | 63 (100) | 0.024b | |
| Grade 3 | 1 (14.3) | 6 (85.7) | 7 (100) | 1.00c,d | |
| Grade 4 | 1 (12.5) | 7 (87.5) | 8 (100) | ||
|
| |||||
| External opening >2 cm | No | 44 (89.8) | 5 (10.2) | 49 (100) | <0.001 |
| Yes | 46 (52.9) | 41 (47.1) | 87 (100) | ||
|
| |||||
| Recurrent case | No | 63 (70.8) | 26 (29.2) | 89 (100) | 0.11 |
| Yes | 27 (57.4) | 20 (42.6) | 47 (100) | ||
|
| |||||
| Horseshoe fistula | Absent | 86 (69.4) | 38 (30.6) | 124 (100) | 0.021d |
| Present | 4 (33.3) | 8 (66.7) | 12 (100) | ||
|
| |||||
| Number of external openings | 1 | 78 (69) | 35 (31) | 113 (100) | 0.23d |
| 2 | 8 (47.1) | 9 (52.9) | 17 (100) | ||
| 3 | 3 (75) | 1 (25) | 4 (100) | ||
| 4 | 1 (50) | 1 (50) | 2 (100) | ||
| Total | 90 (66.2) | 46 (33.8) | 136 (100) | ||
MRI, magnetic resonance imaging; SPTF, standard practice task force.
a
Grade 1 vs. others;
b
Grade 2 vs. 3 and 4;
c
Grade 3 vs. 4;
d
Fisher exact test.