Table 4. SIRs for malignant melanoma occurring after a diagnosis of NHL by sex, age and time from diagnosis of NHL.
| Characteristic | Observed | Expected | SIR | 95% CI | P-value |
|---|---|---|---|---|---|
| Total | 14.0 | 6.6 | 2.1 | (1.2, 3.6) | <0.05 |
| Male | 10.0 | 2.6 | 3.8 | (1.8, 7.0) | <0.001 |
| Female | 4.0 | 4.0 | 1.0 | (0.3, 2.6) | n.s. |
|
Age at diagnosis | |||||
| <50 years | 2.0 | 1.1 | 1.8 | (0.2, 6.4) | n.s. |
| ≥50 years | 12.0 | 5.5 | 2.2 | (1.1, 3.9) | <0.05 |
|
Time from NHL diagnosis | |||||
| 0–2 years | 6.0 | 2.6 | 2.3 | (0.8, 5.1) | n.s. |
| 3–10 years | 7.0 | 3.4 | 2.1 | (0.8, 4.3) | n.s. |
| ≥11 years | 1.0 | 0.7 | 1.5 | (0.0, 8.8) | n.s. |
NHL=non-Hodgkin's lymphoma, SIR=standardised incidence rate, CI=confidence interval, n.s.=not significant.