Examining the challenges of family recruitment to behavioral intervention trials: factors associated with participation and enrollment in a multi-state colonoscopy intervention trial

Table 3 Cost per participant at each of the three stages of case and relative recruitment, 2009 to 2011

	Cost per participant^a	Contact intensity^b
Stage 1 Registry recruitment
California	$5.94	Low
Colorado	$27.41	Moderate
Idaho	$28.69	High
New Mexico	$5.69	Low
Utah	$23.02	High
Stage 2 Family contact form case contact cost	$25.23	High
Stage 3 At-risk relative recruitment cost	$31.37	High

^aCosts per stage only account for direct costs involved in the recruiting process, including direct staff time and labor for telephone contact, direct staff time and labor to compile and mail all letters and questionnaires, and material costs associated with printing, mailing materials, and postage.^bHigh: both phone and mail follow-up. Moderate: at least one mail follow-up or one phone follow-up. Low: no follow-up.

ISSN: 1745-6215