Abstract
Aim: To assess the short-term (daily) association of air pollution and weather with physical activity in COPD patients.
We studied 407 COPD patients (85% men, 68 (9) years, FEV1 57 (18) %pred, 6MWD 486 (95) m) from a multi-center study in Catalonia (Spain) that provided daily physical activity records (steps, time in moderate-to-vigorous physical activity, sedentary time, locomotion movement intensity) for two 7-day campaigns one year apart, using the Dynaport MoveMonitor. We applied a spatiotemporal assessment to obtain weather (temperature, rainfall, daylight duration, solar radiation) and air pollution (NO2, PM10, PM2,5ABS) exposure during 7 periods of 24 h (lags 0-6) prior to the physical activity record. Mixed-effect linear regression models were adjusted for weekday, season, age, sex and social class with patient and city as random effects.
Higher average and maximum temperature at lags 0-1, solar radiation at lag 1 and daylight duration at all lags were significantly associated with more steps (Figure 1). Higher rainfall on the same day was related to less steps. Higher PM10 and PM2,5ABS levels were associated to less steps at lags 3-4. Similar results were shown for moderate-to-vigorous and sedentary time. No associations were observed for NO2 exposure nor with physical activity intensity.
Daily physical activity of COPD patients is influenced by the weather of the same day and air pollution levels of previous days.
Footnotes
Cite this article as Eur Respir J 2022; 60: Suppl. 66, 2373.
This article was presented at the 2022 ERS International Congress, in session “-”.
This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only).
- Copyright ©the authors 2022
