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Table 4 Proportions of outlier subjects in exposed and control groups. Data are referred to tail intensity (% of DNA migrated in the comet tail).

From: Primary DNA damage and genetic polymorphisms for CYP1A1, EPHX and GSTM1 in workers at a graphite electrode manufacturing plant

  Exposed Controls OR (95% CI)
Total 42* 16 2.59 (1.32–5.05)
≤ 40 years 11 5 2.39 (0.72–7.93)
> 40 years 31* 11 2.63 (1.17–5.90)
Employment ≤ 10 years 15   
Employment > 10 years 27   
Non smokers 24* 9 2.93 (1.18–7.30)
Smokers 18 7 2.29 (0.85–6.18)
  1. * p < 0.05, exposed vs. controls. Pearson-χ2 test.