The Study
Association of Screening by Thyroid Ultrasonography with Mortality in Thyroid Cancer: A Case–Control Study Using Data from Two National Surveys
This study looked at people who died from thyroid cancer and compared them to people who didn’t — it asked if they’d had an ultrasound scan. It found no clear link between getting scanned and living longer. But because it didn’t randomly assign people to get scanned or not, we can’t say the scan caused anything — it just shows a possible pattern.
Analysis score
Maximum 58 for a case-control study.
Where the score came from
Doctors checked if scanning healthy people's thyroids with ultrasound helped them live longer by catching cancer early.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 553 / 100
Quality score
Researchers compare people who have a condition (cases) with similar people who do not (controls), looking back in time for differences in exposure. Useful but more prone to bias.
Key takeaways
Summary
Based on the study abstract and findings.
- 1No, the result is not significant — screening didn't lower death risk, even though more cancers were found.
- 2120 people died of thyroid cancer; 1,184 didn't.
- 3Those who got screened were not less likely to die — odds were 1.44 or 1.13, neither of which meant anything statistically.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Thyroid
Year
2019
Authors
J. Jun, Soon-Young Hwang, Seri Hong, Mina Suh, K. Choi, K. Jung
Related Content
Claims (2)
Getting everyone screened for thyroid cancer finds a lot of harmless lumps that would never hurt you, so more people are told they have cancer—but it doesn’t save any lives.
Getting an ultrasound of the thyroid if you have no symptoms doesn’t seem to help people live longer or prevent them from dying of thyroid cancer, according to a study in Korea.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.