Table 1. Characteristics of CLL cohort.
| Characteristics | Incidence study | Mortality study |
|---|---|---|
| Number of CLL patients | 13 580 | 13 734 |
| Male | 8062 | 8168 |
| Female | 5518 | 5566 |
| Person-years at risk | 75 878 | 84 482 |
| Median age at diagnosis (years) | 69 | 69 |
| Median length of follow-up (years) | 4.3 | 4.9 |
| Number of second primary cancers | 1793 | — |
| Percent with second malignancy | 13.1% | — |
| Median interval between first and second diagnosis (years) | 3.9 | — |
| Total deaths | — | 8246 |
| Non-cancer causes of death (%) | — | 35.2 |
| Cancer causes of death (%) | — | 64.8 |
Abbreviation: CLL=chronic lymphocytic leukaemia.