title: A randomized trial to assess the effect of a research informational pamphlet on telephone survey completion rates among older Latinos.
abstract: OBJECTIVE
  To assess the effects of receiving a research informational pamphlet produced by the federal Office for Human Research Protections on telephone survey participation rates of older Latinos, and illustrate the feasibility of nesting recruitment studies within other funded studies when stand alone funding for recruitment studies is limited.
  
  
  METHODS
  Latino patients aged ≥50 with ≥1 visit during the preceding year (N=1314) were sampled from three community clinics and a multi-specialty medical group. Patients were randomly assigned to receive or not receive a pamphlet that contained information on research participation in the initial mailing for the telephone survey study. Survey participation rates were compared between the pamphlet and no pamphlet groups.
  
  
  RESULTS
  In a multivariate model, women (OR=1.4; 95% CI 1.1, 1.8), and those with public insurance (vs. no insurance; OR=1.7; 95% CI 1.1, 2.5) were more likely to participate, while those age 65+ (vs. age 50-54; OR=0.6; 95% CI 0.4, 0.8) were less likely to participate; there was no significant difference by pamphlet group (OR=0.8; 95% CI 0.7, 1.1). Nesting of the randomized trial of the recruitment pamphlet within the funded study required minimal additional resources.
  
  
  CONCLUSIONS
  Recruitment methods that are more intensive than a pamphlet may be needed to enhance survey participation rates among older Latinos. Nesting recruitment trials within funded studies is a promising and efficient approach for testing recruitment strategies.
authors.affiliation: Medical Effectiveness Research Center for Diverse Populations, the Center for Aging in Diverse Communities, Division of General Internal Medicine, Department of Medicine, University of California San Francisco, San Francisco, CA 94118-0856, USA. jasmine.santoyo-olsson@ucsf.edu
authors.forename: Jasmine
authors.initials: J
authors.lastname: Santoyo-Olsson
authors.forename: Lisa
authors.initials: L
authors.lastname: Phan
authors.forename: Anita L
authors.initials: AL
authors.lastname: Stewart
authors.forename: Celia
authors.initials: C
authors.lastname: Kaplan
authors.forename: Gina
authors.initials: G
authors.lastname: Moreno-John
authors.forename: Anna M
authors.initials: AM
authors.lastname: Nápoles
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002140:California; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000208:ethnology; D003430:Cross-Sectional Studies; D055088:Early Detection of Cancer; D005240:Feasibility Studies; D005260:Female; D054624:Health Status Disparities; D006306:Health Surveys / Q000379:methods*; D006630:Hispanic or Latino; D006801:Humans; D007348:Insurance, Health; D007407:Interviews as Topic; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D010174:Pamphlets; D010353:Patient Education as Topic / Q000379:methods*; D018579:Patient Selection; D012737:Sex Factors; D014838:Volunteers