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Table 1 Characteristics of the study cohort

From: The relative risk of second primary cancers in Austria’s western states: a retrospective cohort study

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