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CPS1113 Madhu Mazumdar et al.
                   Hospital Location                                                   0.0091
                                  Rural          1,898    8.95   7,724     9.21
                                  Urban         19,320   91.05   76,174   90.79
                   COMORBIDITY-RELATED
                   Charlson-Deyo Comorbidity Index                                     0.0162
                   (Categorized)
                                  0             10,943   51.57   43,894   52.32
                                  1              6,202   29.23   24,186   28.83
                                  2              2,466   11.62   9,465    11.28
                                  2+             1,607    7.57   6,353     7.57
                  *Continuous variable median and interquartile range reported, instead of N
                  and %, respectively.
                  **Standardized difference of >0.1 suggests a clinically meaningful covariate
                  distribution between groups

                  References
                  1.  Glaser D, Hastings RH. An introduction to multilevel modeling for
                      anesthesiologists. Anesth Analg. 2011;113(4):877-887.
                      doi:10.1213/ANE.0b013e3182198a01.
                  2.  Austin P. An Introduction to Propensity Score Methods for Reducing the
                      Effects of Confounding in Observational Studies. Multivariate Behav Res.
                      2011;46(3):399-424. doi:10.1080/00273171.2011.568786.
                  3.  Greenland S. An introduction to instrumental variables for
                      epidemiologists. Int J Epidemiol. 2000;29(4):722-729.
                      doi:10.1093/ije/29.4.722.
                  4.  Soucacos PN, Johnson EO, Babis G. Randomised controlled trials in
                      orthopaedic surgery and traumatology: Overview of parameters and
                      pitfalls. Injury. 2008;39(6):636-642. doi:10.1016/j.injury.2008.02.011.
                  5.  Bagiella E, Karamlou T, Chang H, Spivack J. Instrumental variable
                      methods in clinical research. J Thorac Cardiovasc Surg. 2015;150(4):779-
                      782. doi:10.1016/j.jtcvs.2015.07.056.
                  6.  Baltagi BH. Simultaneous Equations Model. In: Econometrics. Berlin,
                      Heidelberg: Springer Berlin Heidelberg; 2011:257-303. doi:10.1007/978-
                      3-642-20059-5_11.
                  7.  Vertullo CJ, Lewis PL, Lorimer M, Graves SE. The effect on long-term
                      survivorship of surgeon preference for posterior-stabilized or minimally
                      stabilized total knee replacement an analysis of 63,416 prostheses from
                      the Australian Orthopaedic Association national joint replacement
                      registry. J Bone Jt Surg - Am Vol. 2017;99(13):1129-1139.
                      doi:10.2106/JBJS.16.01083.
                  8.  Ellimoottil C, Ryan AM, Hou H, Dupree J, Hallstrom B, Miller DC.
                      Implications of the definition of an episode of care used in the
                      comprehensive care for joint replacement model. JAMA Surg.
                      2017;152(1):49-54. doi:10.1001/jamasurg.2016.3098.

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