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The prevalence of stroke according to indoor radon concentration in South Koreans: Nationwide cross section study
This study combines 2 nationwide studies. Demographic characteristics and medical history of participants were obtained from Korean National Health and Nutrition Examination Survey (KNHANES) from 2007 to 2012. Participants over 40 years old and who completed the questionnaire were included in the study. Indoor radon concentration was analyzed using the mean value of winter housing radon concentration from 2012 to 2016 published by the National Institute of Environmental Research. The average values of each metropolitan city and province were assigned to the residence of the participant. To eliminate the potential confoundi...
Source: Medicine - January 1, 2020 Category: Internal Medicine Tags: Research Article: Observational Study Source Type: research

Association between volume of surgery for acute hemorrhagic stroke and mortality
This study aimed to investigate the association between volume of surgery and mortality in relation to interventions for acute hemorrhagic stroke, namely craniotomy and trephination. We obtained data on acute hemorrhagic stroke patients for a 5-year period (2009–2013) from the Health Insurance Review and Assessment Service. Hospitals were classified into 3 categories according to volume of surgery (low, medium, high). To avoid intentionally setting a cutoff, we placed the hospitals in order from those with high volume of surgery to those with low volume of surgery and divided them into 3 groups (tertile) according to th...
Source: Medicine - August 1, 2018 Category: Internal Medicine Tags: Research Article: Observational Study Source Type: research