| Study Groups | Toxin A | Toxin A & B | Enzyme | Culture | ||||
| − (%) | + (%) | − (%) | + (%) | − (%) | + (%) | − (%) | + (%) | |
| Patients | 46 (57.5) | 14 (17.5) | 51 (63.8) | 9 (11.3) | 37 (46.3) | 23 (28.8) | 53 (66.3) | 7 (8.8) |
| Control | 20 (100) | 0 (00) | 20 (100) | 0 (00) | 17 (21.3) | 3 (3.8) | 19 (23.8) | 1 (1.3) |
| Total | 66 (82.5) | 14 (17.5) | 71 (88.8) | 9 (11.3) | 54 (67.5) | 26 (32.5) | 72 (90.0) | 8 (10.0) |
| P value | 0.036 (S) | 0.064 (NS) | 0.045 (S) | 0.355 (NS) | ||||