Table 7 The loading matrix of atmospheric pollutants on three principal components
From: Ambient air pollutants and hospital visits for pneumonia: a case-crossover study in Qingdao, China
Variables | PC1 | PC2 | PC3 |
|---|---|---|---|
PM2.5 | 0.934 | −0.133 | − 0.251 |
PM10 | 0.925 | −0.205 | −0.245 |
SO2 | 0.797 | 0.602 | 0.034 |
NO2 | 0.829 | −0.200 | 0.523 |