Turner 2008.

Population (low back pain description; location; setting; data collection period)	Prospective cohort: Workers with back injury claims with > 4 days of lost work time; United States of America; Occupational; July 2002 ‐ April 2004
Sample size	1885
Prognostic factor (type, measure(s) of individual recovery expectations)	GENERAL: Certainty of working in 6 months (0 ‐ 10)
Notes	Funding Source: National Institute for Occupational Safety and Health, US Department of Health and Human Services Conflict of Interest: Not reported