| Case | Referent | Total | OR* (95% CI) | |
| % Yes | % Yes | % Yes | ||
| Metal dust or fumes | 23.8 | 23.3 | 23.5 | 1.04 (0.84 to 1.28) |
| Pesticide or weed killer | 3.9 | 5.2 | 4.7 | 0.69 (0.45 to 1.07) |
| Fertilisers | 3.4 | 3.8 | 3.6 | 0.87 (0.54 to 1.40) |
| Oils or greases | 27.6 | 27.0 | 27.3 | 1.04 (0.86 to 1.27) |
| Detergents or soaps | 28.7 | 26.2 | 27.2 | 1.15 (0.94 to 1.40) |
| Glues, adhesives or resins | 22.7 | 20.5 | 21.4 | 1.17 (0.94 to 1.45) |
| Paints, varnishes or lacquers | 18.9 | 17.0 | 17.8 | 1.16 (0.92 to 1.46) |
| Printing inks and dye stuffs | 6.0 | 6.1 | 6.1 | 0.96 (0.66 to 1.39) |
| Dry cleaning fluids | 0.7 | 1.0 | 0.9 | 0.74 (0.27 to 2.02) |
| Other solvents | 23.1 | 23.6 | 23.4 | 0.98 (0.79 to 1.20) |
| Welding | 8.6 | 9.3 | 9.0 | 0.90 (0.66 to 1.22) |
| Metal work | 16.6 | 16.9 | 16.8 | 0.96 (0.75 to 1.21) |
| Electroplating | 0.3 | 0.7 | 0.6 | 0.47 (0.13 to 1.76) |
| Degreasing | 10.1 | 10.8 | 10.5 | 0.93 (0.69 to 1.24) |
| Stripping | 9.9 | 8.7 | 9.2 | 1.17 (0.86 to 1.58) |
| Extremely hot environment | 10.9 | 10.2 | 10.5 | 1.10 (0.83 to 1.46) |
| Heavy vibration machining, equipment or vehicles | 15.6 | 15.4 | 15.5 | 1.04 (0.82 to 1.33) |
| Non-ionising radiation | 11.6 | 11.5 | 11.5 | 1.00 (0.76 to 1.31) |
| Driving (and/or driver’s mate) (more than 4 hours/day) | 28.8 | 25.6 | 26.9 | 1.20 (0.99 to 1.46) |
| Flying (more than 10 flights/year) | 5.1 | 5.6 | 5.4 | 0.88 (0.59 to 1.31) |
| Working underground or underwater | 1.4 | 1.4 | 1.4 | 1.12 (0.53 to 2.37) |
| N** | 874 | 1244 | 2118 |
OR, odds ratio.
*For each self-reported exposure, “not exposed” is the referent value. ORs have been adjusted, in a multilevel model, for surgery to the testes, previous conception, use of alcohol and wearing boxer shorts, clustered within the centre.
**Missing data ranged from N = 1 (for driving) to N = 18 (for exposure to detergents or soaps).