Folic acid and birth defects

From our free online course, “Causal Diagrams: Draw Your Assumptions Before Your Conclusions”: https://www.edx.org/course/causal-diagrams-draw-assumptions-harvardx-ph559x?utm_source=social&utm_medium=partner-marketing&utm_content=youtube-harvardx&utm_campaign=harvardx Observational studies indicate that folic acid reduces the risk of birth defects. But the estimate changes depending on what the analysis adjusts for. How do we know which variables to include in our analysis to get the correct estimate? — Subscribe to our channel: https://www.youtube.com/channel/UCKJyv_uNh3LhYFKmwaB63bA?sub_confirmation=1 — Sign up for emails about new courses: https://harvardx.link/email — HarvardX courses on edX: https://www.edx.org/school/harvardx — Harvard University's online courses: https://online-learning.harvard.edu/ HarvardX empowers the faculty of Harvard University to create high-quality online courses in subjects ranging from computer science to history, education, and religion.