Table 1 Outcome measures and delivery time points

Demographic

Age, gender, ethnic group, age at leaving full-time education, occupation, current work status

Yes

History

Time since completely free of back pain

Yes

History

Previous back pain treatments

Yes

Medications

Current medications

Yes

Yes

History

Satisfaction with health state

Yes

Yes

History

Troublesomeness question

Yes

Yes

Back pain-related disability

Roland Morris disability questionnaire [14]

Yes

Yes

Back pain-related disability

The modified von Korff (MVK) disability score. [15, 16]

Yes

Yes

Back pain severity

MVK pain scale [15]

Yes

Yes

Modified form of Patient-Generated Index [17, 18]

Yes

Yes

Psychological distress

Depression, Anxiety, and Positive Outlook Scale (DAPOS). [19]

Yes

Yes

Pain self-efficacy

Pain self-efficacy questionnaire [20]

Yes

Yes

Health-related quality of life

SF-12 version 2, reported as physical and mental component scores [21]

Yes

Yes

Health utilities

EuroQol EQ-5D-5 L [22, 23]

Yes

Yes

Yes

Yes

Well-being

Warwick-Edinburgh Mental Well-being Scale (WEMWEBS) [24]

Yes

Yes

Pain distribution

Troublesomeness grid [10]

Yes

Back pain severity today

11-point pain rating scale [16]

Yes

Yes

Current work status

If appropriate date of return to work

Yes

Health and social service resource use

Including hospital and community resource, as well as costs to individuals and carers

Yes