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Open Access Open Badges Research article

Income and patient-reported outcomes (PROs) after primary total knee arthroplasty

Jasvinder A Singh123* and David G Lewallen3

Author Affiliations

1 Medicine Service and Center for Surgical Medical Acute are Research and Transitions (C-SMART), Birmingham VA Medical Center, 700 19th Street South Birmingham, AL 35233, USA

2 Department of Medicine at School of Medicine, and Division of Epidemiology at School of Public Health, University of Alabama, 20th Street South, FOT 805B, Birmingham, AL 35294, USA

3 Department of Orthopedic Surgery, Mayo Clinic College of Medicine, 200 1st St SW, Rochester, MN 55905, USA

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BMC Medicine 2013, 11:62  doi:10.1186/1741-7015-11-62

Published: 6 March 2013

Additional files

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.

Format: DOCX Size: 66KB Download file

Open Data

Additional file 2:

Sensitivity analyses using a different income category cut-off of US$39, 000 for the lowest category in multivariable-adjusted analyses. This table shows the sensitivity analyses that used a different cut-off for income for the lowest income category of US$39, 000 instead of US$35, 000 (as in the main model).

Format: DOCX Size: 64KB Download file

Open Data

Additional file 3:

Sensitivity analyses using body mass index (BMI) and age as continuous variables in multivariable-adjusted analyses. this table shows the sensitivity analyses that adjusted the main model for a continuous age and BMI variable instead of the categorical variable for both.

Format: DOCX Size: 59KB Download file

Open Data