Table 1.

Study recruitment to the Healthy Eating Study from July 1, 2007 through October 15, 2010.

Inquiries	Number
Total	1314
Gender
Male	372
Female	890
Unknown	52
Type of inquiry
Email	488
Phone	826
Source of inquiries
Posted Flyer	277
Clinical Trials Websitea	257
Newspaper Articles about Study	70
Word of Mouth	58
Physician Referralb	32
Otherc	85
Reasons for lack of follow-up
Ineligibled	625
No responsee	347
Live too far away	17
Did not want flexible sigmoidoscopy	16
Want to lose weight	9
Taking high dose NSAIDs or supplements	8
Other reasons	22
Completed study screening visit	270

^aThe University of Michigan supported a clinical trials website for the community called “Engage” that listed the study and the basic eligibility requirements.

^bPhysician referral was obtained through physicians in the Department of Family Medicine. Providers identified potentially eligible patients, and the study then sent a letter and study brochure to 280 subjects, 32 of whom responded by contacting the study.

^cOther sources of recruitment were listing of the study in a University of Michigan alumni electronic newsletter, the hospital website, and referral from the call center.

^dIneligible individuals lacked colon cancer risk factors (n=282) or were ineligible for other reasons such as medical conditions or being above the upper BMI limit.

^eEmail inquiries accounted for 307 of the “no response” category, with the remaining 40 resulting from not being able to return a call from either a call center message or answering machine.