1Division of Public Health and Preventive Medicine, Seoul National University Hospital, Seoul, Korea
2Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
Copyright © 2020 Korean Society of Cardiovascular Disease Prevention; International Society of Cardiovascular Pharmacotherapy, Korea Chapter.
This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Conflict of Interest
The author has no financial conflicts of interest.
Author Contributions
Conceptualization: Jeong NY, Choi NK; Investigation: Jeong NY, Kim SH, Lim E, Choi NK; Supervision: Choi NK; Writing - original draft: Jeong NY, Kim SH, Lim E; Writing - review & editing: Jeong NY, Kim SH, Lim E, Choi NK.
Pre-exposure period | Post-exposure period | Difference | |
---|---|---|---|
Exposure group | A+B | A+B+C+D | C+D |
Control group | A | A+C | C |
DID | D |
Pre-exposure period | Post-exposure period | Difference | |
---|---|---|---|
Exposure group | A+B | A+B+C+D | C+D |
Control group | A | A+C | C |
DID | D |
DID = difference-in-differences.