Numerous environmental factors that influence myopia have been studied, but only few factors have been definitively identified. We examined factors influencing myopia using data from 2014 to 2020 physical examinations received from the Korean Military Manpower Administration. We used the Cochran–Armitage trend test to investigate the annual prevalence of myopia and high myopia. To determine risk factors for myopia, logistic regression was performed. The data of 2,215,126 19-year-old Korean men were examined. The myopia and high myopia prevalences showed significant annual increases; in 2020, these prevalences were 58.9% and 18.0%, respectively. The myopia prevalence was high when the birth season was spring, education level was high, height was small, weight and body mass index (BMI) were low (< 18.5 kg/m2), and color vision was normal (all, p < 0.05). The high myopia prevalence was high when the birth season was spring, education level was high, height was tall, weight and BMI were low (< 18.5 kg/m2), and color vision was normal (all, p < 0.05). The prevalence of myopia and high myopia in this population is increasing annually. The risk of both conditions increased when the birth season was spring, education level was high, BMI was low, color vision was normal, and diabetes was present.
Breast ultrasonography is useful for breast cancer screening. To overcome the limitations of handheld ultrasound (HHUS), automated breast ultrasound (ABUS) was developed, and its use in clinical practice has, ever since, been increasing. In terms of performance, there is no significant difference between HHUS and ABUS; therefore, the resources can be managed efficiently if both methods are used appropriately. This study aimed to analyse the experiences of patients who underwent ABUS for breast cancer screening and to identify factors that can increase patient compliance and efficient resource allocation. We conducted a patient experience survey before and after ABUS in 140 patients who visited the hospital for breast cancer screening. Most patients were satisfied with ABUS; however, patients with small breasts, of young age, with very dense breasts, and having low BMI were dissatisfied and had high pain scores. Therefore, we recommend using ABUS as the primary tool for breast screening while maintaining the flexibility to use HHUS for patients with risk factors. This strategy can be expected to improve the overall compliance and efficient utilization of resources.
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