Alveolar nitric oxide is a non-invasive indicator of small-airway inflammation, a key pathophysiologic mechanism underlying lower respiratory diseases. However, no epidemiological studies have investigated the impact of fine particulate matter (PM) exposure on the concentration of alveolar nitric oxide (CANO). To explore the associations between PM exposure in multiple periods and CANO, we conducted a nationwide cross-sectional study in 122 Chinese cities between 2019 and 2021.
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January 2023
Background: Non-optimum ambient temperature has not been widely perceived as an important environmental risk factor for asthma, and the association between ambient temperature and pulmonary function is rarely explored. Our study aimed to investigate the associations between non-optimum ambient temperature and pulmonary function among asthmatic adult patients.
Methods: We performed a longitudinal study among 4,992 eligible adult asthmatic patients in 25 cities of China from 2017 to 2020.
Background: Few studies have explored the role of ambient temperature in asthma exacerbation.
Objective: We aimed to explore the association of temperature with diurnal peak expiratory flow (PEF) variation and asthma exacerbation.
Method: We developed a longitudinal study among asthmatic adults in 18 Chinese cities.
The short-term associations of fine particulate matter (PM) and coarse particulate matter (PM) with pulmonary function were inconsistent and rarely evaluated by dynamic measurements. Our study aimed to investigate the associations of PM and PM with real-time pulmonary function. We conducted a longitudinal study based on dynamic pulmonary function measurements among adult asthmatic patients in 25 cities of 19 provincial regions of China from 2017 to 2020.
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