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Table 3 Agreement between administrative (ICD-9) diagnosis codes and manual chart reviewa

From: Validating laboratory defined chronic kidney disease in the electronic health record for patients in primary care

Comorbidity Prevalence (Chart Review) Prevalence (EHR) Sensitivitya Specificitya Kappa Statistic p-value ‡
Cerebrovascular disease 10% 8% 100% 98% 0.88 < 0.001
Congestive heart failure 14% 16% 50% 93% 0.45 0.001
Coronary artery disease 18% 22% 82% 100% 0.88 < 0.001
Diabetes mellitus 44% 42% 95% 93% 0.88 < 0.001
Hypertension 78% 86% 91% 100% 0.73 < 0.001
  1. aCalculated for ICD-9 diagnosis of each condition compared to chart review (including clinical notes, ICD-9 diagnoses, laboratory results etc.)
  2. p-values are calculated from Cohen’s Kappa test statistic as an index of interrater agreement between 2 raters on categorical data