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Table 2 Distribution of air pollution at residential address for 4,769 women from Diet, Cancer, and Health cohort

From: Long-term exposure to air pollution and mammographic density in the Danish Diet, Cancer and Health cohort

  Mean (SD) Median (IQR) 25 th -75 th pct. Min-Max
Air pollutants (μg/m 3 )     
Baselinea NOx 46.1 (42.4) 29.3 (26.7) 21.8-48.5 15.9-379.5
NOx since 1971b 41.5 (30.7) 31.1 (23.8) 23.0-46.8 16.7-347.4
Baseline NO2 23.0 (8.3) 20.2 (7.9) 18.1-26.0 13.2-64.1
NO2 since 1971 21.2 (6.2) 19.7 (6.3) 17.4-23.7 13.2-59.6
  1. SD - standard deviation; a1-year mean 1993/97; bca. 25-year mean 1971-1993/97.