OBJECTIVES: To develop a model that will predict the mortality of patients undergoing Coronary Artery Bypass Graft (CABG) and evaluate the performance of hospitals. METHODS: Data from 564 CABGs performed in six general hospitals were collected through medical record abstraction by registered nurses. Variables studied involved risk factors determined by severity measures. Risk modeling was performed through logistic regression and validated with cross-validation. The statistical performance of the developed model was evaluated using c-statistic, R2, and Hosmer-Lemeshow statistic. Hospital performance was assessed by severity-adjusted mortalities. RESULTS: The developed model included age, sex, BUN, EKG rhythm, Congestive Heart Failure at admission, acute mental change within 24 hours, and previous angina pectoris history. The c-statistic and R2 were 0.791 and 0.101, respectively. Hosmer-Lemeshow statistic was 10.3(p value=0.2415). One hospital had a significantly higher mortality rate than the average mortality rate, while others were not significantly different. CONCLUSION: Comparing the quality of service by severity adjusted mortality rates, there were significant differences in hospital performance. The severity adjusted mortality rate of CABG surgery may be an indicator for evaluating hospital performance in Korea.
Angina Pectoris ; Coronary Artery Bypass ; Electrocardiography ; Heart Failure ; Hospital Mortality ; Hospitals, General ; Humans ; Korea ; Logistic Models ; Medical Records ; Mortality* ; Risk Adjustment ; Risk Factors ; Transplants

BACKGROUND/AIMS: A number of clinical trials reported varying effects of cholesterol lowering agents in nonalcoholic fatty liver disease (NAFLD) patients. We, therefore, assessed the changes in hepatic steatosis and NAFLD activity score (NAS) after treatment with cholesterol lowering agents in NAFLD patients by metaanalysis. METHODS: The Cochrane Library, the MEDLINE, and the Embase databases were searched until May 2015, without any language restrictions, for randomized controlled trials (RCTs) and nonrandomized studies (NRSs). Additional references were obtained from review of bibliography of relevant articles. The quality of evidence was assessed using the grading of recommendations assessment, development and evaluation guidelines. RESULTS: Three RCTs (n = 98) and two NRSs (n = 101) met our study inclusion criteria (adult, NAFLD, liver biopsy). Liver biopsy was performed in all five studies, but only the three studies reported NAS. Ezetimibe significantly decreased NAS (standardized mean difference [SMD], –0.30; 95% confidence interval [CI], –0.57 to –0.03) but not hepatic steatosis in RCT (SMD, –0.1; 95% CI, –0.53 to 0.32), while the effect was significant for both NAS and intrahepatic content in NRSs (SMD, –3.0; 95% CI, –6.9 to 0.91). CONCLUSIONS Ezetimibe decreased NAS without improving hepatic steatosis.

BACKGROUND: Helicobacter pylori infection occurs throughout the world and causes various gastroduodenal diseases in all age groups. The prevalence of H. pylori infection varies among countries and races. The aim of this study was to evaluate the seroprevalence of H. pylori infection in healthy people in Korea. METHODS: From March 1998 to October 1998, 5,732 asymptomatic subjects responded to the self-assessment questionnaires from 54 hospitals were enrolled. Serum level of anti-H. pylori IgG was measured by ELISA test. RESULTS: The overall prevalence of H. pylori infection was 46.6% and showed no significant difference between male (47.2%) and female (45.9%). According to the geographic areas, the highly prevalent provinces were Kangwon (53.4%), Cheju (52.9%) and Jeonra provinces (50.6%), while Seoul (41.9%) was the lowest prevalent area. The seroprevalence increased with age and was the highest at 40's (78.5%). The characteristic feature of this study was that the infection rate increased steeply in three age groups (10-12, 16-19 years old and 30's). In Seoul, there was no different prevalence rate among the districts studied. CONCLUSION: The nation-wide seroprevalence of H. pylori infection in Korea is higher than that of the developed countries. We hope that this study provides the landmark for the study of H. pylori infection in Korea.
Continental Population Groups ; Developed Countries ; Enzyme-Linked Immunosorbent Assay ; Female ; Gangwon-do ; Helicobacter pylori* ; Helicobacter* ; Hope ; Humans ; Immunoglobulin G ; Jeju-do ; Korea* ; Male ; Prevalence ; Self-Assessment ; Seoul ; Seroepidemiologic Studies* ; Surveys and Questionnaires