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• W17929806 abstract "Extracting comorbidity information is crucial for phenotypic studies because of the confounding effect of comorbidities. We developed an automated method that accurately determines comorbidities from electronic medical records. Using a modified version of the Charlson comorbidity index (CCI), two physicians created a reference standard of comorbidities by manual review of 100 admission notes. We processed the notes using the MedLEE natural language processing system, and wrote queries to extract comorbidities automatically from its structured output. Interrater agreement for the reference set was very high (97.7%). Our method yielded an F1 score of 0.761 and the summed CCI score was not different from the reference standard (p=0.329, power 80.4%). In comparison, obtaining comorbidities from claims data yielded an F1 score of 0.741, due to lower sensitivity (66.1%). Because CCI has previously been validated as a predictor of mortality and readmission, our method could allow automated prediction of these outcomes." @default.
• W17929806 created "2016-06-24" @default.
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• W17929806 date "2013-12-01" @default.
• W17929806 modified "2023-09-30" @default.
• W17929806 title "Deriving comorbidities from medical records using natural language processing" @default.
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• W17929806 doi "https://doi.org/10.1136/amiajnl-2013-001889" @default.
• W17929806 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3861932" @default.
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