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Table 3 Descriptive statistics for prior one-year exposure to coarse particulate matter (PM10–2.5) concentrations (μg/m3) for SWAN sites, 1999–2004

From: Association between coarse particulate matter and inflammatory and hemostatic markers in a cohort of midlife women

Site N Mean SD Median IQR
All sites 5175 10.9 3.6 11.5 4.0
By site
 Detroit, MI 719 10.6 3.5 10.3 3.9
 Chicago, IL 1296 12.1 1.9 12.0 2.4
 Oakland, CA 1229 10.9 1.8 11.6 2.2
 Los Angeles, CA 209 17.5 2.3 18.4 1.6
 Newark, NJ 366 12.4 4.9 12.8 5.7
 Pittsburgh, PA 1356 8.5 3.8 7.4 6.8