BACKGROUND: Joint arthroplasty @entity1 have a high prevalence of co-morbidities and this impacts their surgical outcomes. There are different ways to ascertain co-morbidities and appropriate measurement is necessary. The purpose of this study was to: (1) describe the prevalence of co-morbidities in a @entity572 (THA) and knee arthroplasty (TKA) @entity1 using two diagnoses-based measures (Charlson and Elixhauser) and one prescription-based measure (RxRisk-V); (2) compare the agreement of co-morbidities amongst the measures. METHODS: A cross-sectional study of Australian veterans undergoing THAs (n   =   11,848) and TKAs (n   =   18,972) between 2001 and 2012 was conducted. Seventeen co-morbidities were identified using the Charlson, 30 using the Elixhauser, and 42 using the RxRisk-V measure. Agreement between co-morbidities was calculated using Kappa (k) statistics. RESULTS: Combining measures, 64 conditions were identified, of these 28 were only identified using the RxRisk-V, 11 using the Elixhauser, and 2 using the Charlson. The most prevalent conditions was @entity158 treated with anti-inflammatories (58.7  % THAs, 55.9  % TKAs), @entity158 treated with narcotics (55.0  % THAs, 50.9  % TKAs), @entity101 (56.0  % THAs and TKAs), and anticoagulation disorders (53.0  % THAs, 48.6  % TKAs). @entity6 was the only condition with substantial agreement (all k   >   0.6) amongst all measures. When comparing the diagnoses based algorithms, agreement was high for overlapping conditions (all k   >   0.71). CONCLUSIONS: Different measures identified different co-morbidities, provided different estimates for the same co-morbidity, and had different levels of agreement for common co-morbidities. This highlights the importance of understanding co-morbidity measures and using them appropriately in studies and case-mix adjustments analyses.

Comparing co-morbidities in total joint arthroplasty XXXX using the RxRisk-V, Elixhauser, and Charlson Measures: a cross-sectional evaluation.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity101 :: ('MESH:D006973', 'Disease') :: ['hypertension'] @entity6 :: ('MESH:D003920', 'Disease') :: ['Diabetes'] @entity572 :: ('MESH:D006617', 'Disease') :: ['cohort of total hip arthroplasty'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain']
@entity1 :: (9606,Species) :: ['patients']
