Fig. 4From: Correlation between indoor air pollution and adult respiratory health in Zunyi City in Southwest China: situation in two different seasonsComparison of pulmonary function (FVC, FEV1, FEV1/FVC, and PEFR) in the adults and correlation of pulmonary function with sleeping area PM2.5 exposure in winter and summer. Spearman correlation, r: Correlation coefficientBack to article page