Table 3 Exposures in the 3 months prior to semen sample assessed by the occupational hygiene team from the job questionnaires
Exposure% rated as:Adjusted model* p Value
NoneLowMediumHighTotal
Lead (organic)99.20.60.20.1100.00.088†
Lead (inorganic)85.412.02.20.4100.00.175
Manganese84.312.62.40.8100.00.924
Mercury (organic)99.40.50.00.0100.00.531‡
Mercury (inorganic)98.41.00.30.2100.00.156†
Boron82.814.72.00.6100.00.296
All other metals79.215.23.71.9100.00.720
Carbon disulphide94.75.00.20.0100.00.306†
Glycol ethers75.618.64.21.6100.00.006
Methylene chloride85.811.32.20.7100.00.744
Styrene90.67.91.20.3100.00.394
Tetrachloroethylene92.45.41.90.2100.00.970
All other VOCs65.225.37.02.5100.00.020
Pesticides96.52.01.10.4100.00.087
Heat89.54.73.02.8100.00.731
Vibration66.317.310.36.1100.00.607
Radiation (non-ionising)86.97.63.52.1100.00.344
Radiation (ionising)95.13.11.50.3100.00.805
  • VOC, volatile organic compound.

  • Intensity is compared with other occupational exposures in the UK (see text), n = 2118.

  • *In a multi-level logistic regression model to assess relation to case status including: surgery to the testes, previous conception, use of alcohol, and wearing boxer shorts, clustered within centre.

  • †“High” and “moderate” combined to eliminate empty cells.

  • ‡“High”, “moderate” and “low” combined to eliminate empty cells.