Table 3.

Regression coefficients (95% CI) for log-transformed trans, anti-PheT concentrations regressed on log-transformed 1-OHP concentrations

Coefficient* (95% CI)P
Crude association0.68 (0.41 - 0.95)<0.001
Adjusted association0.66 (0.36 - 0.95)<0.001
Effect modification by exposure
    Pre-exposure0.58 (0.17 - 0.99)0.01
    Post-exposure0.70 (0.35 - 1.06)<0.001
Effect modification by cotinine level
    Urinary cotinine at 10th percentile0.77 (0.45 - 1.09)<0.001
    Urinary cotinine at 90th percentile0.14 (−0.59 - 0.86)0.7
  • * Regression coefficients express the change in log trans, anti-PheT concentration with each 1-unit increase in log 1-OHP.

  • Models were adjusted for age, occupational exposure status, and urinary cotinine levels.