- This study is a meta-analysis, which means the researchers used combined data from multiple studies.
- The results from this study are only as strong as the studies used in the analysis and a weak research study will affect the results negatively.
- There will be different research designs between the studies that the researchers cannot control for.
- This is relevant to young breast cancer survivors. However, more work needs to be done to show that an association between breast and thyroid cancer is definitive.