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Reducing Data Dimension of Electronic Medical Records: An Empirical Study |
Mu Dongmei(), Wang Ping, Zhao Danning |
School of Public Health, Jilin University, Changchun 130021, China |
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Abstract [Objective] This paper explores the strategy of reducing the data dimension of electronic medical records, aiming to improve the knowledge discovery. [Methods] First, we conducted preliminary dimension reduction through literature review. Then, we used three methods to finish the second round of dimension reduction. We extracted the factors with the eigenvalue greater than 1, with the cumulative contribution rate greater than 85%, as well as factors of significant differences. Finally, we compared results of the three methods with empirical research. [Results] The dimensional reduction methods extracted 8, 17 and 14 attributes respectively. After qualitative and quantitative evaluation, the principal component analysis method yielded the best result, whose dimension of the feature root was larger than 1. [Limitations] The sample size needs to be expanded for more in-depth analysis. [Conclusions] The proposed method could effectively reduce the data dimension of electronic medical records.
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Received: 23 October 2017
Published: 05 February 2018
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