Additional file 1.
Sensitivity analyses additionally adjusting multivariable analyses for preoperative activity limitation in pain outcome models and preoperative pain in activity limitation models. This table shows the sensitivity analyses that adjusted the main models for pain and activity limitation additionally for preoperative pain and activity limitation, respectively.
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Singh and Lewallen BMC Medicine 2013 11:62 doi:10.1186/1741-7015-11-62