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Implications of Data Extraction and Processing of Electronic Health Records for Epidemiological Research: Observational Study

Implications of Data Extraction and Processing of Electronic Health Records for Epidemiological Research: Observational Study

For these analyses, we merged the available indicators based on the mutual identification number of the patient and compared the mean and SD for each indicator by performing paired samples t tests and calculating the corresponding 99% CIs, that is, the confidence level was set to 99% due to the large number of data.

Melissa H J van Essen, Robin Twickler, Yvette M Weesie, Ilgin G Arslan, Feikje Groenhof, Lilian L Peters, Isabelle Bos, Robert A Verheij

J Med Internet Res 2025;27:e64628