Table 1. Planned outcomes from protocol [42] and outcomes actually measured.
| Outcome | Planned in protocol | Collected in trial | Data collection method | When collected |
| GP level | ||||
| X-ray referral; Any imaging referral1 | Y | N | Data abstraction from patient files | N/A |
| Advice to stay active; Advised bed rest1 | Y | N | Telephone interview of patient participants | N/A |
| Behavioural constructs (e.g. knowledge, attitudes and intentions): Manage without x-ray referral;Give advice to stay active | Y | Y | Questionnaire | Baseline, 12 months |
| Fear Avoidance Beliefs (FAB) | Y | Y | Questionnaire | Baseline, 12 months |
| Behavioural simulation: X-ray referral; Anyimaging referral; Advice to stay active; Advice regardingbed rest | N | Y | Patient vignettes (Questionnaire) | 12 months |
| X-ray and CT rates per patient seen | N | Y | Administrative data (Medicare imaging data) | 12 months |
| Patient level 1 | ||||
| Pain and Disability, FAB, Quality of Life andHealth Service Utilisation Items | Y | N | Telephone interview | N/A |
| X-ray occurred | Y | N | Telephone interview | N/A |
1
Patient outcomes, and GP level outcomes measured at the patient level, were not collected because insufficient patient participants were recruited to the trial.