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Number of patients at follow-up, by randomisation group
| Follow-up hospital/week | Sham group | Caudal epidural saline group | Caudal epidural steroid group | Total no |
|---|---|---|---|---|
| University Hospital of North Norway | ||||
| 6 | 15 | 10 | 13 | 38 |
| 12 | 14 | 10 | 12 | 36 |
| 52 | 13 | 9 | 12 | 34 |
| Nordland Hospital | ||||
| 6 | 8 | 10 | 8 | 26 |
| 12 | 6 | 6 | 6 | 18 |
| 52 | 6 | 6 | 5 | 17 |
| Levanger Hospital | ||||
| 6 | 8 | 10 | 8 | 26 |
| 12 | 7 | 10 | 6 | 23 |
| 52 | 6 | 10 | 7 | 23 |
| St Olavs University Hospital | ||||
| 6 | 5 | 7 | 7 | 19 |
| 12 | 5 | 6 | 7 | 19 |
| 52 | 5 | 5 | 7 | 17 |
| Buskerud Hospital | ||||
| 6 | 3 | 3 | 3 | 9 |
| 12 | 4 | 3 | 3 | 13 |
| 52 | 2 | 3 | 3 | 5 |
