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. 2011 Feb 5;12(4):637–652. doi: 10.1093/biostatistics/kxr002

Table 2.

Quantiles of correlations between different measures of county-level daily PM10–2.5 and PM2.5 exposures across 59 counties. Exposure measures for PM2.5 and PM10–2.5 are derived using either TM or WME modeling

Correlation between Minimum 25% 50% 75% Maximum
(1) PM10–2.5, TM , PM10–2.5, WME 0.50 0.89 0.92 0.95 1.00
(2) PM2.5, TM, PM2.5, WME 0.72 0.94 0.97 0.99 1.00
(3) PM2.5, TM, PM10–2.5, TM – 0.20 0.05 0.12 0.23 0.59
(4) PM2.5, WME, PM10–2.5, WME – 0.15 0.05 0.18 0.32 0.59