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. 2020 Jun 16;22(6):e18457. doi: 10.2196/18457

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©Sheng-Feng Sung, Cheng-Yang Hsieh, Ya-Han Hu. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 16.06.2020.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Annual number of publications between 2000 and 2017 (A) in PubMed, (B) in the top 20 journals that have published the most studies using National Health Insurance (NHI) claims data, and (C) based on NHI claims data, separated by JCR (2017 edition) ranking (Q1, Q2, Q3, Q4). The first year of each major OAMJ is indicated. The release of the National Health Insurance Research Databases (NHIRD) began in 2000 and ended in 2015. The Health and Welfare Database (HWD) was created in 2009 and is still available for research use.