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Table 1 Descriptive statistics of the demographic characteristics, health and environmental variables among the male Normative Study Aging population at their visits during 2006-2008 at visit (n = 320)

From: Effect modification of air pollution on Urinary 8-Hydroxy-2'-Deoxyguanosine by genotypes: an application of the multiple testing procedure to identify significant SNP interactions

Variable Values *
Average 8-hydroxy-2'-Deoxyguanosine, ng/ml (log) 2.81 (0.78)
Average maximal 1-hour ozone, ppm 0.039 (0.016)
Average daily sulfate, μg/m3 2.68 (2.14)
Average daily organic carbon, μg/m3 3.43 (1.31)
Average daily apparent temperature, °C 13.2 (9.8)
Age, years 76.7 (6.1)
Body mass index, kg/m2 28.0 (4.5)
Systolic blood pressure, mmHg 124 (18)
Plasma folate, ng/mL 21.6 (12.7)
Plasma pyridoxal-5-phosphate, nmol/L 101 (105.)
Plasma vitamin B12, pg/mL 590 (273)
Use of statin, n (%) 180 (56.6)
Cumulative cigarette package years 19.8 (23.4)
Alcohol intake (≥2/day), n (%) 61 (19.4)
Smoking status, n (%)  
   Never smoker 93 (29.1)
   Current smoker 7 (2.2)
   Former smoker 220 (68.8)
  1. * Values are mean ± SD when appropriate. Interquatile ranges (IQR) for 20-day moving averages of maximal 1-hour O3 and SO4 2- were 16.4 ppb and 1.29 μg/m3, respectively.