Responses from the six methods of administering the diary
| Method | No of diaries administered | Response (%) | No |
|---|---|---|---|
| Postal with financial incentive | 102 | 60 | 61 |
| Postal without financial incentive | 102 | 54 | 55 |
| Telephone with financial incentive | 65 | 69 | 45 |
| Telephone without financial incentive | 65 | 45 | 29 |
| Clinic visit with financial incentive | 50 | 44 | 22 |
| Clinic visit without financial incentive | 50 | 38 | 19 |
| Totals | 434 | 53 | 231 |