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. Author manuscript; available in PMC: 2013 Sep 10.
Published in final edited form as: Ann Intern Med. 2009 Apr 7;150(7):465–473. doi: 10.7326/0003-4819-150-7-200904070-00006

Figure 1. Criteria used to define the final cohort of elderly patients eligible for a colorectal cancer screening during 2001–2002.

Figure 1

*Eligibility criteria included having been seen in an outpatient clinic at 1 of 4 VA’s during 1/1/01–12/31/02 which indicated that the VA was at least partially responsible for medical care, but data on colorectal cancer screening was gathered during the entire 2-year interval from both national VA and Medicare claims. Additional eligibility criteria included having at least 1 outpatient visit during 1/1/00–12/31/00 to define comorbidity as of 1/1/01.

†History was defined by searching VA and Medicare inpatient and outpatient claims prior to 1/1/01, dating as far back as 10/1/92 for VA claims and 1/1/99 for Medicare claims.