
Derivation and Validation of Automated Electronic Search Strategies to Extract Charlson Comorbidities From Electronic Medical Records
Keywords: CCI; Charlson Comorbidity Index; CI; confidence interval; DDQB; Data Discovery and Query Builder; EMR; electronic medical record; ICD-9; International Classification of Disease, Ninth Revision; ICU; intensive care unit; IQR; interquartile range; MCLSS; Ma