Table 4.
Recruitment for the exploratory analgesic dietary intervention for chronic daily headache, May 2010
| N | Percent | |
|---|---|---|
| Inquiries about study | 183 | |
| Potentials to be screened | 59 | 32.2 |
| Screened | 124 | 67.8 |
| Eligible, but declined to participate | 5 | 4.0 |
| Ineligible at telephone screen | 35 | 28.2 |
| Headache characteristics | 15 | 42.9 |
| Medical/psychiatric problems | 4 | 11.4 |
| Logistic problems (time/distance) | 11 | 31.4 |
| Dietary Issues | 2 | 5.7 |
| Other/unknown | 3 | 8.6 |
| Scheduled for baseline consent | 84 | 68.3 |
| Ineligible at baseline consent | 5 | 6.0 |
| Eligible at baseline consent | 79 | 94.0 |
| Withdrew/ineligible before randomization | 10 | 11.9 |
| Withdrew after randomization | 5 | 6.0 |
| Awaiting baseline visit | 18 | 14.5 |
| Enrolled | 46 | 37.9 |
| Referral pattern | ||
| Health professionals* | 126 | 72.0 |
| Electronic advertisements | 32 | 18.3 |
| Print advertisements | 12 | 6.9 |
| Family/Friends | 2 | 1.1 |
| Prior Study | 3 | 1.7 |
| Unknown | 8 |
* Health professionals that referred patients to the study included neurologists, family physicians, and nurses.