Study designs of 838 articles published in 1990, 2000, and 2010.
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https://figshare.com/articles/dataset/_Study_designs_of_838_articles_published_in_1990_2000_and_2010_/1570692
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资源简介：
# Descriptive: cross-sectional study, sampling survey and prevalence study;
*Chi-square test for differences among years.
Study designs of 838 articles published in 1990, 2000, and 2010.
创建时间：
2015-10-08
