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Follow-up rate and methods of response
| Follow-up outcome | Baseline | 3 months | 6 months | 12 months |
|---|---|---|---|---|
| Number of valid responses at time point | 19 | 15 | 12 | 18 |
| Offered paper based CRF | 19 | 19 | 18 | 18 |
| Offered web-based CRF | 0 | 0 | 10 | 18 |
| Completed web-based CRF | 0 | 0 | 2 | 6 |
| Completed postal CRF | 19 | 15 | 10 | 12 |
