Hildebrandt 1997.

Population (low back pain description; location; setting; data collection period)	Prospective cohort: People recruited from a pain clinic with chronic back pain and at least 3 months of disability leave during the last year; Germany; Secondary care; Data collection period not reported
Sample size	90
Prognostic factor (type, measure(s) of individual recovery expectations)	GENERAL: Expectation of ability to return to work after discharge from treatment (unclear scale)
Notes	Funding Source: The Germany Ministry of Education, Research, and Technology Conflict of Interest: Not reported