| Groups | Cleanliness of small intestine/case | The incidence of side reactions/case (%) | |||
| Level 1 | Level 2 | Level 3 | Level 4 | ||
| Group A (n = 31) | 5 | 14 | 8 | 2 | 9 (29.03) |
| Group B (n = 30) | 7 | 14 | 6 | 3 | 21 (70.00) |
| Group C (n = 32) | 4 | 15 | 10 | 3 | 7 (21.88) |