• 1. Beijing University of Chinese Medicine, Beijing 100029, P. R. China;
  • 2. Department of Traditional Chinese Medicine for Pulmonary Diseases, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing 100029, P. R. China;
  • 3. Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu 610041, P. R. China;
  • 4. Chinese Evidence-based Medicine Center / MAGIC China Center / Cochrane China, West China Hospital, Sichuan University, Chengdu 610041, P. R. China;
  • 5. School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, P. R. China;
  • 6. International Institute of Evidence-based Chinese Medicine, Beijing University of Chinese Medicine, Beijing 100029, P. R. China;
ZHANG Ying, Email: yingzhang@bucm.edu.cn
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Objective  When making causal inferences in observational studies, in order to improve the robustness of the results of observational studies, statistical analysis techniques are often used to estimate the impact of unmeasured potential confounding factors. By systematically reviewing the application progress of the E-value, one of the sensitivity analysis methods, the advantages and limitations of using the E-value were discussed, to provide references for the application, reporting and interpretation of the E-value. Methods  In the PubMed database, E-value was used as a keyword for title, abstract and key paper citation retrieval, and the literature that used the E-value analysis method for sensitivity analysis during 2016-2021 was screened. Results  The E-value was widely used not only in cohort studies (n=215) and case-control studies (n=15), but also in cross-sectional studies (n=28), randomized controlled trials (n=6) and meta-analysis (n=16). The E-value was often combined with other sensitivity analysis methods, such as hierarchical analysis, instrumental variables, and multiple statistical regression models that correct different covariates, to further explore the reliability and robustness of the results. Conclusion  When the E-value is used to evaluate the confounding factors in observational studies, the confidence interval and P value can be combined to evaluate the sensitivity of the results more comprehensively.

Citation: FANG Hanyu, ZHANG Hongchun, HONG Zheng, LI Sheyu, LIU Jianping, ZHANG Ying. Application progress and interpretation of E-value in sensitivity analysis. Chinese Journal of Evidence-Based Medicine, 2022, 22(8): 988-992. doi: 10.7507/1672-2531.202202006 Copy

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