Table 6.

Dose response pattern for presence and frequency of translocations by levels of 2-naphthol

Tertiles of 2-naphthol levels (ng/L)
Translocation147–<2,540 (n = 38)2,540–<5,800 (n = 38)5,800–132,000 (n = 37)P trend
% presence (N)10.5% (4)15.8% (6)27.0% (10)0.16
OR (95% CI)11.85 (0.46–7.36)4.29a (1.11–16.6)0.09
Mean frequency (SD)0.048 (0.15)0.080 (0.221)0.114 (0.227)0.20
Mean ratio (95% CI)11.65 (0.44–6.19)3.23b (0.850–12.5)0.22

NOTE: OR and MR derived from sex and ethnicity adjusted regression models.