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Table 1 Distribution of PM mass and metals contained in PM* among study subjects (N = 63)

From: Ambient PM exposure and DNA methylation in tumor suppressor genes: a cross-sectional study

Exposure (μg/m3) N Mean (SD) Min Percentile Max
      25 th 50 th 75 th  
PM 10 63 233.42 (214.56) 73.72 152.23 179.45 222.86 1220.17
PM 1 63 8.48 (6.18) 1.71 3.51 9.01 11.35 30.49
Aluminum 63 8.50 (18.07) 0.40 1.48 2.05 7.41 84.07
Manganese 63 11.26 (30.41) 0.11 1.20 4.63 10.77 174.79
Nickel 63 0.30 (0.18) 0.02 0.23 0.25 0.46 0.72
Zinc 63 18.85 (26.37) 0.26 1.47 8.45 32.28 129.06
Arsenic 63 0.10 (0.1) 0.01 0.02 0.07 0.17 0.31
Lead 63 7.53 (17.46) 0.13 0.63 2.87 9.52 99.90
Iron 63 32.02 (22.08) 0.96 18.00 25.64 48.69 88.43
  1. *Metals were measured in the PM10 fraction of PM mass