Is physical activity a modifier of the association between air pollution and arterial stiffness in older adults: The SAPALDIA cohort study

Association between the probability of increased brachial-ankle pulse wave velocity (baPWV) and particulate matter (PM10, PM2.5, per interquartile range (IQR)) among physically active and inactive subjects. All models are adjusted by age, sex, education, socioeconomic position, packyears of smoking, body mass index, heart rate and mean arterial pressure. The scale of the x-axis extends from the lower to the upper quartile of the respective pollutant.