| Treatment group | Provocation factors | Total number | |||||||
| Food | Forward bending | Supine position | Alcohol | Coffee | Stress | No pattern | |||
| Before treatment | OMT (n=44) | 19 | 18 | 16 | 5 | 7 | 5 | 4 | 74 |
| Control (n=14) | 5 | 5 | 3 | 2 | 4 | 4 | 0 | 23 | |
| After treatment | OMT (n=44) | 13 | 10 | 11 | 4 | 4 | 3 | 1 | 49 |
| Control (n=14) | 4 | 4 | 2 | 1 | 3 | 2 | 0 | 16 | |