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Table 3 Agreement between each co-morbidity measure of individual conditions. Cohen’s Kappa coefficient and 95 % confidence intervals for agreement estimations

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

  Total hip arthroplasty Total knee arthroplasty
  RxRisk-V Elixhausera RxRisk-V Charlsonb Elixhauser Charlsonc RxRisk-V Elixhausera RxRisk-V Charlsonb Elixhauser Charlsonc
  ƙ (95 % CI) ƙ (95 % CI) ƙ (95 % CI) ƙ (95 % CI) ƙ (95 % CI) ƙ (95 % CI)
Cancer       
 Malignancies - 0.07 (0.04-0.10) - - 0.06 (0.03-0.08) -
 Metastatic cancer   - 1.00 (1.00-1.00)   - 1.00 (1.00-1.00)
Cardiovascular/blood       
 Anticoagulation agents/coagulopathy 0.01 (0.00-0.01)    0.00 (0.00-0.01)   
 Arrhythmias 0.35 (0.33-0.38) - - 0.34 (0.32-0.36) - -
 Congestive heart failure 0.26 (0.23-0.28) 0.26 (0.23-0.28) 1.00 (1.00-1.00) 0.18 (0.16-0.20) 0.18 (0.16-0.20) 1.0 (1.00-1.00)
 Hypertension (complicated and uncomplicated) 0.13 (0.11-0.14) - - 0.13 (0.11-0.14) - -
Peripheral vascular disease - - 1.00 (1.00-1.00) - - 1.00 (1.00-1.00)
Endocrine       
 Diabetes (uncomplicated) 0.63 (0.60-0.65) 0.63 (0.60-0.65) 0.94 (0.93-0.96) 0.61 (0.59-0.63) 0.61 (0.59-0.63) 0.95 (0.95-0.96)
 Diabetes (complicated) - - 0.97 (0.96-0.98) - - 0.98 (0.97-0.98)
 Hypothyroidism 0.12 (0.09-0.15) - - 0.08 (0.06-0.10) - -
Gastrointestinal       
 Liver disease (mild) -   0.71 (0.56-0.85) - - 0.76 (0.67-0.86)
 Liver disease (severe) or failure - 0.01 (0.00-0.02) - - 0.00 (0.00-0.00) -
 Peptic ulcer disease - - 0.82 (0.76-0.88) - - 0.79 (0.74-0.85)
Muscuoskeletal/pain related       
 Rheumatoid arthritis/collage vascular disorders - - 0.94 (0.92-0.97) - - 0.95 (0.94-0.97)
Neurologic       
 Dementia - 0.34 (0.27-0.41) - - 0.36 (0.28-4.43) -
 Paralysis (or Paraplegia/Hemiplegia) - - 1.00 (1.00-1.00) - - 1.00 (1.00-1.00)
Psychological/behavioral       
 Alcohol abuse/dependence 0.06 (0.00-0.12) - - 0.10 (0.05-0.16) - -
 Depression 0.07 (0.06-0.08) -   0.06 (0.05-0.07) -  
 Psychotic illness/psychoses 0.05 (0.01-0.09) -   0.04 (0.01-0.07) -  
Renal/urologic       
 Renal disease/failure 0.11 (0.07-0.15) 0.11 (0.08-0.15) 0.94 (0.92-0.96) 0.07 (0.04-0.10) 0.07 (0.05-0.10) 0.95 (0.94-0.97)
Respiratory       
 Chronic pulmonary disease - - 1.00 (1.00-1.00) - - 1.00 (1.00-1.00)
  1. aRxRisk-V and Elixhauser have ten conditions in common
  2. bRxRisk-V and Charlson have six conditions in common
  3. cElixhauser and Charlson have 12 conditions in common, six where the diagnoses codes are identical (only 11/5 are shown because no cases of HIV/AIDS were identified in this sample)