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Therapeutic Research
Abstract
Objective:The aim of this study is to elucidate the effects of PM2.5 removal equipment, a ventilation system with a HEPA filter, on health condition in living environment. Methods:A retrospective study was conducted with 15 people who were living in a house furbished with PM2.5 removal equipment, and the performance of PM2.5 removal equipment was measured. Participants were examined of their lung function and other biomarkers. The same data of 6 years prior to the time point was also collected. Results:PM2.5 concentration was kept low as well as 6 years ago in the house. Participants without suspected COPD nor change in life habits were chosen for statistical analysis. Blood pressure tended to decrease. For lung function, forced vital capacity (FVC)and forced expiratory volume in 1 second(FEV1), which are reported to be more susceptible to PM2.5 exposure than other items, did not significantly change compared to 6 years ago. Especially, the decrease compared to predicted value was low in FVC (-0.09 L vs -0.02 L), FEV1(-0.13 L vs -0.07 L)and“lung age”(-5.7 y vs -2.6 y). Conclusions:These results show that living in a house furbished with a PM2.5 removal equipment may have beneficial effect on health conditions of the residents. So far, health effect of living environment has not been considered to a large extent, but the importance of living environment is increasing due to the COVID‒19 pandemic. This study shed light to the health effect of living environment.
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