Table 3.
Standardised incidence ratios and 95% confidence intervals for testicular cancer according to semen characteristics
| Variable | Total No of men | Observed No of cases | Expected No of cases | Standardised incidence ratio (95% CI) |
|---|---|---|---|---|
| Concentration (106/ml) | ||||
| 0 and no children before analysis | 1 031 | 7 | 2.0 | 3.5 (1.4 to 7.2)* |
| 0 and children before analysis | 1 644 | 6 | 3.0 | 2.0 (0.7 to 4.3) |
| 0-20 | 10 509 | 33 | 14.4 | 2.3 (1.6 to 3.2)* |
| >20 | 18 668 | 42 | 36.9 | 1.1 (0.8 to 1.5) |
| Not available | 590 | 1 | 0.8 | 1.3 (0.0 to 7.0) |
| Motility† | ||||
| Poor | 1 312 | 7 | 2.8 | 2.5 (1.0 to 5.2)* |
| Good | 19 362 | 44 | 28.0 | 1.6 (1.1 to 2.1)* |
| Not available | 9 093 | 25 | 21.3 | 1.2 (0.8 to 1.7) |
| Proportion abnormal (%)† | ||||
| >75 | 528 | 4 | 1.4 | 3.0 (0.8 to 7.6) |
| 0-75 | 27 618 | 64 | 47.8 | 1.3 (1.0 to 1.7)* |
| Not available | 1 621 | 8 | 2.9 | 2.7 (1.2 to 5.4)* |
*
P<0.05. †Excluding 2675 azoospermic men.