Association of compound hot extreme with blood pressure in Guangdong province

[Background] It is projected that the frequency, density, and duration of compound hot extreme may increase in the 21st century in the context of global warming. [Objective] To explore the association between compound hot extreme and blood pressure, and identify sensitive populations. [Methods] This was a cross-sectional study. The study subjects were from six Guangdong Province Chronic Disease and Nutrition Surveys during 2002 through 2015. A questionnaire was administered to the participants with questions about demographic information, drinking and smoking status, and measurements on their height, weight, and blood pressure were also collected. We chose the data of May, September, and October to explore the association between compound hot extreme and blood pressure. Compound hot extreme means a hot day with a proceeding hot night. Daily meteorological data were obtained from China Meteorological Data Service Centre. We employed inverse distance weighting to interpolate the temperature and relative humidit