• Sangeun Lee, Yoon Young Lee, Hyo Joong Yoon, Eunji Choi, Mina Suh, Boyoung Park, Jae Kwan Jun, Yeol Kim, and Kui Son Choi.
• Graduate School of Cancer Science and Policy, Goyang, Korea.
• Cancer Res Treat. 2016 Jul 1; 48 (3): 883-91.

PurposeCommunicating the harms and benefits of thyroid screening is necessary to help individuals decide on whether or not to undergo thyroid cancer screening. This study was conducted to assess changes in thyroid cancer screening intention in response to receiving information about overdiagnosis and to determine factors with the greatest influence thereon.Materials And MethodsData were acquired from subjects included in the 2013 Korean National Cancer Screening Survey (KNCSS), a nationwide, population-based, cross-sectional survey. Of the 4,100 respondents in the 2013 KNCSS, women were randomly subsampled and an additional face-to-face interview was conducted. Finally, a total of 586 female subjects were included in this study. Intention to undergo thyroid cancer screening was assessed before and after receiving information on overdiagnosis.ResultsPrior awareness of overdiagnosis in thyroid cancer screening was 27.8%. The majority of subjects intended to undergo thyroid cancer screening before and after receiving information on overdiagnosis (87% and 74%, respectively). Only a small number of subjects changed their intention to undergo thyroid cancer screening from positive to negative after receiving information on overdiagnosis. Women of higher education level and Medical Aid Program recipients reported being significantly more likely to change their intention to undergo thyroid cancer screening afterreceiving information on overdiagnosis,whilewomen with stronger beliefs on the efficacy of cancer screening were less likely to change their intention.ConclusionWomen in Korea appeared to be less concerned about overdiagnosis when deciding whether or not to undergo thyroid cancer screening.

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