title: The development and validation of a comorbidity index for prostate cancer among Black men.
abstract: OBJECTIVE
  The purpose of this study was to develop a comorbidity index specific to Black Men with prostate cancer, because certain comorbidities and prostate cancer are particularly prevalent among this racial group.
  
  
  METHODS
  This research used the Surveillance, Epidemiology, and End Results (SEER)-Medicare-linked database to develop an index of comorbidity burden based on survival, and the presence/absence of comorbid illness in 2,931 Black males diagnosed with prostate cancer. Comorbidity burden was recognized using inpatient, outpatient, and physician claims for a 2-year period prior to the diagnosis of prostate cancer. We compared five different statistical models, each with two-way, three-way, and/or four-way interactions among the comorbidities, and selected the model with only two-way interactions as the optimal choice. We demonstrated the utility of refining the simplest model, with 27 comorbidity categories only, by adjusting for the number of different diagnoses within statistically significant categories.
authors: Health Services Management, University of Kentucky, 121 Washington Avenue, Room 113C, Lexington, KY 40536-0003, USA. stfelm2@pop.uky.edu
authors: Steven T
authors: ST
authors: Fleming
authors: Kevin A
authors: KA
authors: Pearce
authors: Kathleen
authors: K
authors: McDavid
authors: Dmitri
authors: D
authors: Pavlov
mesh_terms: D001741:Black or African American; D015897:Comorbidity; D003627:Data Interpretation, Statistical; D006801:Humans; D008297:Male; D006278:Medicare; D015233:Models, Statistical; D011471:Prostatic Neoplasms / Q000453:epidemiology* / Q000401:mortality; D018426:SEER Program; D016019:Survival Analysis