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Table 3 Prevalence and reliability index between chart abstract and ICD-10 discharge abstract data for 3 select conditions, by sampling method

From: Measuring agreement of administrative data with chart data using prevalence unadjusted and adjusted kappa

  Chart (+) p 1, % ICD10 (+) p 2,% Chart(+) ICD10(+) (a),% Chart(-) ICD10(+) (b),% Chart(+) ICD10(-) (c), % Chart(-) ICD10(-) (d),% Positive agreement Negative agreement PABAK Kappa (PABAK-kappa) Observed agreement (I o ) Chance agreement (I e )
Random sample              
   Hypertension 30.19 22.13 20.61 1.52 9.58 68.29 0.79 0.92 0.78 0.72 0.06 0.89 0.61
   Myocardial infarction 12.75 8.38 7.83 0.55 4.92 86.70 0.74 0.97 0.89 0.71 0.18 0.95 0.81
   Congestive heart failure 8.33 6.34 5.71 0.62 2.62 91.04 0.78 0.98 0.94 0.76 0.18 0.97 0.86
Restricted sample #              
   Hypertension 78.51 78.77 73.36 5.42 5.15 16.07 0.93 0.75 0.78 0.69 0.09 0.89 0.66
   Myocardial infarction 37.92 29.84 27.89 1.95 10.04 60.12 0.82 0.91 0.76 0.73 0.03 0.88 0.55
   Congestive heart failure 25.58 22.56 20.34 2.22 5.24 72.20 0.85 0.95 0.85 0.80 0.05 0.93 0.63
Case-control sample $              
   Hypertension 52.20 50.00 46.56 3.44 5.64 44.36 0.91 0.91 0.82 0.82 0.00 0.91 0.50
   Myocardial infarction 49.70 50.00 46.73 3.27 2.98 47.02 0.94 0.94 0.88 0.88 0.00 0.94 0.50
   Congestive heart failure 45.47 50.00 45.08 4.92 0.39 49.61 0.94 0.95 0.89 0.89 0.00 0.95 0.50
  1. #: The sample restricted to the condition of hypertension, myocardial infarction, and congestive heart failure
  2. $: Condition chosen first, with random selection of controls without the condition of interest.