RESUMEN
Background@#Low-density lipoprotein cholesterol is an important marker highly associated with cardiovascular disease. Since the direct measurement of it is inefficient in terms of cost and time, it is common to estimate through the Friedewald equation developed about 50 years ago. However, various limitations exist since the Friedewald equation was not designed for Koreans. This study proposes a new low-density lipoprotein cholesterol estimation equation for South Koreans using nationally approved statistical data. @*Methods@#This study used data from the Korean National Health and Nutrition Examination Survey from 2009 to 2019. The 18,837 subjects were used to develop the equation for estimating low-density lipoprotein cholesterol. The subjects included individuals with low-density lipoprotein cholesterol levels directly measured among those with high-density lipoprotein cholesterol, triglycerides, and total cholesterol measured. We compared twelve equations developed in the previous studies and the newly proposed equation (model 1) developed in this study with the actual low-density lipoprotein cholesterol value in various ways. @*Results@#The low-density lipoprotein cholesterol value estimated using the estimation formula and the actual low-density lipoprotein cholesterol value were compared using the root mean squared error. When the triglyceride level was less than 400 mg/dL, the root mean squared of the model 1 was 7.96, the lowest compared to other equations, and the model 2 was 7.82. The degree of misclassification was checked according to the NECP ATP III 6 categories. As a result, the misclassification rate of the model 1 was the lowest at 18.9%, and Weighted Kappa was the highest at 0.919 (0.003), which means it significantly reduced the underestimation rate shown in other existing estimation equations. Root mean square error was also compared according to the change in triglycerides level. As the triglycerides level increased, the root mean square error showed an increasing trend in all equations, but it was confirmed that the model 1 was the lowest compared to other equations. @*Conclusion@#The newly proposed low-density lipoprotein cholesterol estimation equation showed significantly improved performance compared to the 12 existing estimation equations. The use of representative samples and external verification is required for more sophisticated estimates in the future.
RESUMEN
Background@#Early recognition and prompt intramuscular epinephrine administration are critical for the treatment of anaphylaxis. The special emergency medical service team (SEMST) is a reorganization plan that incorporates first-level emergency medical technicians (EMTs) and nurses from Korea to give the authority to administer epinephrine. This study evaluates the experience of SEMST and aims to investigate further needs in the pre-hospital management of anaphylaxis. @*Methods@#An online survey of 29 questions on the Gangwon-do 119 EMST was conducted.IBM SPSS Statistics ver. 20.0 (IBM Co., Armonk, NY, USA) and R ver.4.0.3. were used for statistical analysis. @*Results@#A total of 428 (44.6%) participants responded to the questionnaire, and 55.6% (238/428) experienced anaphylaxis. The common presumed cause was insect sting/animal bites at 84.5% (201/238), followed by food (7.6%, 18/238), and drugs (6.3%, 15/238). The frequency of occurrence was highest for tourist attractions (58.6%, 167/285), followed by homes (31.9%, 91/285) and workplace (3.5%, 10/285). Among 136 medical personnel (31.8%) who were currently active or had been active as the SEMST, 95 (70.0%) experienced anaphylaxis, and 58 (61.1%) used epinephrine, which was significantly lower in the nonSEMST group (n = 36, 25.2%). The biggest difficulty in pre-hospital treatment was the limitation of drug administration authority (23.4%, 22/95). The lack of experience and tricky treatment are the chief difficulties in pediatric anaphylaxis. The percentage of correct answers regarding anaphylaxis awareness was significantly higher in the educated (n = 374) than in the non-educated group (n = 54), both for diagnosis (24.9% vs. 11.1%) and treatment (73.5% vs. 37.0%). @*Conclusion@#Proper administration of epinephrine is particularly important for pre-hospital anaphylaxis management in rural areas. Expanding SEMST and conducting periodic education using virtual experiences is necessary.