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Table 1 Descriptive statistics of the study population (n = 18)

From: Exposure to traffic-related air pollution and changes in exhaled nitric oxide and DNA methylation in arginase and nitric oxide synthase in children with asthma

Characteristic Measure
Age (years, mean ± SD) 10.6 ± 1.7
Male n(%) 13 (72.2)
Race/ethnicity n(%)
 African American 5 (27.8)
 Hispanic 10 (55.6)
 White 3 (16.6)
Maternal education n(%)
  < High school 2 (12.5)
 High school graduate 9 (56.3)
 Some college 5 (31.2)