Association of Screening by Thyroid Ultrasonography with Mortality in Thyroid Cancer: A Case–Control Study Using Data from Two National Surveys

Background: The incidence of thyroid cancer is increasing worldwide due to an increased detection of small well-differentiated papillary thyroid carcinomas. This study aimed to evaluate the effect of screening with ultrasonography on deaths from thyroid cancer. Materials and Methods: We conducted a matched case–control study using data from two sources representative of the adult Korean population. Cases were selected from the National...