Resources used at each stage of the study
| Resources used at each stage of the study | Count |
| Invitation packs sent | |
| No. of initial invitations sent | 141 |
| No. of 4-week reminder invitations sent | 116 |
| Nurse call sheets | |
| Nurse visit sheets | |
| Nurse phone calls to book baseline appointment, n=29 | |
| Total calls | 51 |
| Calls per patient, mean (SD), range | 1.8 (0.9), 1–4 |
| Written correspondence | |
| GP notification of participation | 27 |
| Confirmation of appointment letter | 27 |
| Certificates | 27 |
| Follow-up | |
| Phone calls, n=19 | |
| Total number of phone calls | 32 |
| Calls per participant, mean (SD), range | 1.7 (0.9), 1–4 |
| Postal mail, n=6 | |
| Total number of letters sent | 10 |
| No. of participants sent a reminder: 2 weeks | 2 |
| 4 weeks | 2 |
| Emails, n=2: total number of emails sent | 2 |