Risk associated with occupational exposure among 80 cases of systemic sclerosis and 160 matched controls; maximum likehood estimate of the odds ratio (OR) and confidence intervals (95% CI)
| Exposure† | Cases n=80 | Controls n=160 | OR (95% CI) |
|---|---|---|---|
| †Ever versus never exposed; *p<0.05; **p<0.01. | |||
| Crystalline silica | 10 | 4 | 5.57 (1.69 to 18.37)** |
| Trichlorethylene | 13 | 12 | 2.39 (1.04 to 5.22)* |
| Chlorinated solvents | 16 | 14 | 2.61 (1.20 to 5.66)* |
| Toluene | 8 | 5 | 3.44 (1.09 to 10.90)* |
| Aromatic solvents | 11 | 9 | 2.67 (1.06 to 6.75)* |
| Ketones | 8 | 2 | 8.78 (1.82 to 42.38)** |
| White spirit | 15 | 10 | 3.46 (1.48 to 8.11)** |
| Any type of solvent | 22 | 20 | 2.66 (1.35 to 5.23)* |
| Epoxy resin | 6 | 3 | 4.24 (1.03 to 17.44)* |
| Welding fumes | 7 | 4 | 3.74 (1.06 to 13.18)* |