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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.