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This paper analyses several issues that arise when measuring technological specialisation with patent data. Three starting choices are required regarding the data source, the statistical measure and the sectoral aggregation level. We show that the measure is highly sensitive to the data source and to the level of sectoral aggregation. The statistical(More)
BACKGROUND This study aimed to determine the association between shift work and inflammatory markers, which are independent risk factors of cardiovascular diseases, in male manual workers at a display manufacturing company. METHODS This study was conducted between June 1 and July 31, 2015 on 244 male manual workers aged 20-39 years old at a display(More)
BACKGROUND The present study investigated the prevalence of depressive symptoms in older Koreans and identified associations between depressive symptoms and occupational factors. METHODS Data from the Korean National Health and Nutrition Examination Survey V (2010-2012) were used to analyze 7320 participants aged 55 years or older. Complex sample logistic(More)
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