The impact of indoor temperature on home blood pressure based on a multilevel model: A field survey on the effect of indoor thermal environment on blood pressure in winter (Part II)

This study aimed to clarify the compositional and contextual effects of indoor temperature on blood pressure (BP). These effects are respectively defined as the increase in BP per 1°C decrease in indoor temperature on a particular day and the increase in BP per 1°C decrease in average indoor temperature of houses based on a multilevel model. Measurement data were collected through field surveys in winter (2012-2014). Both effects were significant, and the sum of the effects was 0.57 mmHg/°C for morning systolic BP and 0.43 mmHg/°C for morning diastolic BP. Also, the interaction between age and temperature was significant.