Table 1 Characteristics of the study cohort
Study cohort | First primary cancers | Second primary cancers | ||
|---|---|---|---|---|
Number of cases | % | Number of cases | % | |
Total | 59,638 | 100 | 4949 | 100 |
Sex | ||||
Males | 31,215 | 52.3 | 3036 | 61.3 |
Females | 28,423 | 47.7 | 1913 | 38.7 |
Age at first diagnosis | ||||
15–24 | 656 | 1.1 | 8 | 0.2 |
25–49 | 9143 | 15.3 | 439 | 8.9 |
50–64 | 19,119 | 32.1 | 1784 | 36.0 |
65–79 | 23,424 | 39.3 | 2356 | 47.6 |
80+ | 7296 | 12.2 | 362 | 7.3 |
Period of first diagnosis | ||||
1988–1990 | 7764 | 13.0 | 706 | 14.3 |
1991–1995 | 15,140 | 25.4 | 1487 | 30.0 |
1996–2000 | 16,837 | 28.2 | 1526 | 30.8 |
2001–2005 | 19,897 | 33.4 | 1230 | 24.9 |
Follow-up interval | ||||
2 months to less than 1 year | 8851 | 14.8 | 546 | 11.0 |
1 year to less than 5 years | 13,279 | 22.3 | 1928 | 39.0 |
5 years to less than 10 years | 17,563 | 29.4 | 1522 | 30.8 |
10 years or longer | 19,945 | 33.4 | 953 | 19.3 |