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INTRODUCTION Plain abdominal radiographs commonly form a part of medical assessments. Most of these films are interpreted by the clinicians who order them. Interpretation of these films plays an important diagnostic role and, therefore, influences the decision for admission and subsequent management of these patients. The aim of this study was to find out how well doctors in different specialties and grades interpreted plain abdominal radiographs.

The study find out developmental factors of the liver diseases in 29,531 subject of the healthy adults who diagnosed by using ultrasound at healthcare centers located at 6 cities around the nation. The results are as follows.Based on the result of the study, the liver diseases diagnosed by using ultrasound revealed to show 43.1％ of prevalence, and the occurrence was significantly higher in male(23.3％) than in female (19.8％)(p<0.001). The disease revealed to show highest prevalence rate in regionally, Dae-jeon was found to record the highest prevalence by showing 49.6％ (p<0.001). The order of liver disease prevalence was the highest in Dae-jeon(49.6%),which was followed by Seoul(48.2%), Busan(42.9%), Incheon(36.2%), Daegu(36.2%), Kangju(32.1%)(p<0.001). The order of hepatic disease prevalence was the highest in fatty liver (69.7％), which was followed by intrahepatic cysts (13.2％), intrahepatic calcification (9.6％), intrahepatic hemangioma (4.5％), intrahepatic tumor (1.4％), diffuse liver disease (1.0％),and liver cirrhosis (0.5％) (p<0.001). The liver disease revealed to show highest prevalence rate in 40s and regionally, disease was found to record the highest prevalence from 30s to 50s (p<0.001).The distribution of the liver diseases by sex revealed to show the higher occurrence of the fatty liver and the diffuse liver diseases in male, but the intrahepatic cysts, intrahepatic calcification and intrahepatic tumors were highly distributed in female. In the regional evaluation, the fatty liver was most often found in Busan, and intrahepatic cysts, intrahepatic hemangioma, intrahepatic calcification and intrahepatic tumors were highly found in Dae-jeon and Seoul revealed to show higher occurrence of diffuse liver disease than other regions (p<0.001).The multiple regression analysis for the related factors which affect the prevalence of the liver diseases resulted to show the higher prevalence by age. sex, ■ keyword :|Healthcare|Ultrasound|Liver Diseases|

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