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. Author manuscript; available in PMC: 2008 Mar 5.
Published in final edited form as: Mutat Res. 2006 Dec 8;627(2):146–157. doi: 10.1016/j.mrgentox.2006.11.001

Table 2.

Characteristics of study subjects and levels of ENU-induced O6-EtGua

Study Subjects O6-EtGua levela
N Mean S.E.b
Selected Variables 171 % 9.21 0.25 P valuec
Age (years)
  ≤ 50 37 21.6 9.32 0.44
 50–60 43 25.1 8.82 0.54
 61–70 61 35.7 9.54 0.46
  > 70 30 17.5 8.76 0.45 0.60
Sex
 Men 87 50.9 8.84 0.35
 Women 84 49.1 9.52 0.35 0.17
Smoking
 Never-smoker 82 47.9 9.37 0.32
 Ever-smoker 89 52.0 9.00 0.37 0.62
  Former 63 36.8 9.03 0.49 0.53d
  Current 26 15.2 8.92 0.46 0.48d
No. years smokede
 < 25 43 25.1 9.85 0.58 0.43d
 ≥ 25 46 26.9 8.20 0.45 0.03d
No. cigarettes/daye
 < 20 27 15.8 9.36 0.90 0.99d
 ≥ 20 62 36.2 8.84 0.37 0.28d
Alcohol
 Never 76 44.5 8.91 0.40
 Quit 24 14.0 10.21 0.64
 Current 71 41.5 9.09 0.35 0.22
a

Square-root transformed value of fmol/μg DNA.

b

Standard error.

c

P value for the two-sample independent Student’s t test or one-way analysis of variance.

d

Compared with adduct levels of never-smokers.

e

Cutoff point was the median of the continuous variable.