Table 3 Spearman’s correlation coefficients between different averaging times of personal and outdoor PM2.5
Personal PM2.51 h4 h8 h12 h22 hOutdoor vs
22 h0.540.700.750.84 0.80 24 h
12 h0.700.910.96 0.50 0.9312 h
8 h0.740.97 0.60 0.980.798 h
4 h0.83 0.54 0.940.920.784 h
1 h 0.70 0.930.790.780.691 h
Personal 1 h4 h8 h12 h24 hOutdoor PM2.5

  • Above the diagonal: personal–personal; below the diagonal: outdoor–outdoor; diagonal (bold): personal–outdoor (longitudinal correlation).