| Stool | Normal | Suspect |
| Hospital “A” (referral centre) | ||
| Correct | 69/100 (69%) | 93/139 (66.9%) |
| Incorrect | 31/100 (31%) | 46/139 (33.1%) |
| Hospital “B” | ||
| Correct | 121/205 (59.0%) | 186/287 (64.8%) |
| Incorrect | 84/205 (41%) | 101/287(35.2%) |
| Hospital “C” | ||
| Correct | 70/95 (73.7%) | 72/133 (54.1%) |
| Incorrect | 25/95 (26.3%) | 61/133 (33.1%) |