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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2012 Aug 21;21(10):1722–1730. doi: 10.1158/1055-9965.EPI-12-0561

Table 2.

Characteristics of the Cohort

Year of index FOBT test
1997–1999 (n=13,556) 2000–2002 (n=10,209) 2003–2005 (n=7,879) 2006–2010 (n=10,435)
Positive FOBT, % 6.7 6.3 7.3 7.0
Female, % 53.5 55.3 55.1 54.3
Age, years
 Mean (SD) 57.7 (7.8) 56.1 (7.1) 55.3 (6.5) 56.2 (6.4)
 45–54, % 43.4 53.1 56.0 48.8
 55–64, % 33.5 31.5 32.8 38.5
 65–74, % 23.1 15.4 11.2 12.7