“…This calculation is valid only for large populations and is intended to promote discussion with the patient about comparative lost productivity, with the most important point being that productivity loss is highest when the patient “does nothing.” The SDM tool relies on multiple data sources, including the Hospital Cost and Utilization Project, the Behavioral Risk Factor Surveillance System, Truven Health MarketScan Research Databases, the Medicare Expenditure Panel Survey, the National Vital Statistics Report, treatment guidelines from the American Academy of Orthopaedic Surgeons, and treatment effects extracted from systematic literature reviews, meta-analyses of randomized, controlled trials, and published randomized controlled trials,[ 19 ] as well as patient and health care provider focus groups. [ 20 ]…”