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. Author manuscript; available in PMC: 2014 Apr 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2013 Feb 19;22(4):681–687. doi: 10.1158/1055-9965.EPI-12-0966

Table 1.

Incidence rates for ovarian, colon, rectal and breast cancer by age group, Iowa Women's Health Study, 1986 – 2008

< 75 years ≥ 75 years
Cancer Cases (N) Person-years at risk Incidence Rate (per 100,000) Cases (N) Person-years at risk Incidence Rate (per 100,000)
Ovarian 187 341,359 54.8 135 214,921 62.8
Colon 604 423,687 142.6 707 271,264 260.6
Rectal 183 350,469 52.2 132 158,727 83.2
Breast 1,593 339,686 469.0 1,071 146,834 729.4