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• W2109347377 abstract "To demonstrate that subject selection based on sufficient laboratory results and medication orders in electronic health records can be biased towards sick patients.Using electronic health record data from 10,000 patients who received anesthetic services at a major metropolitan tertiary care academic medical center, an affiliated hospital for women and children, and an affiliated urban primary care hospital, the correlation between patient health status and counts of days with laboratory results or medication orders, as indicated by the American Society of Anesthesiologists Physical Status Classification (ASA Class), was assessed with a Negative Binomial Regression model.Higher ASA Class was associated with more points of data: compared to ASA Class 1 patients, ASA Class 4 patients had 5.05 times the number of days with laboratory results and 6.85 times the number of days with medication orders, controlling for age, sex, emergency status, admission type, primary diagnosis, and procedure.Imposing data sufficiency requirements for subject selection allows researchers to minimize missing data when reusing electronic health records for research, but introduces a bias towards the selection of sicker patients. We demonstrated the relationship between patient health and quantity of data, which may result in a systematic bias towards the selection of sicker patients for research studies and limit the external validity of research conducted using electronic health record data. Additionally, we discovered other variables (i.e., admission status, age, emergency classification, procedure, and diagnosis) that independently affect data sufficiency." @default.
• W2109347377 created "2016-06-24" @default.
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• W2109347377 date "2014-06-11" @default.
• W2109347377 modified "2023-10-15" @default.
• W2109347377 title "Hidden in plain sight: bias towards sick patients when sampling patients with sufficient electronic health record data for research" @default.
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• W2109347377 doi "https://doi.org/10.1186/1472-6947-14-51" @default.
• W2109347377 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4062889" @default.
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