title: Ethnic Identity predicts loss-to-follow-up in a health promotion trial.
abstract: BACKGROUND
  Higher rates of attrition in health research have been reported for African Americans (AAs). However, little is known about which AAs are more prone to drop out and why. One potential predictor that has not been explored is Ethnic Identity (EI). This study examined the association between EI and loss-to-follow-up among AAs enrolled in a health promotion intervention to increase fruit and vegetable intake.
  
  
  METHODS
  Five hundred and sixty AA adults from two integrated health care delivery systems in Atlanta and Detroit were enrolled into a randomized intervention trial. At baseline, all participants were classified into six EI core groups: Afrocentric, Black American, Bicultural, Multicultural, Assimilated, and High Cultural Mistrust. We examined loss-to-follow-up rates by these EI type.
  
  
  RESULTS
  Overall, 92 participants (16%) were lost to follow up. Loss-to-follow-up rates were higher among those classified as Afrocentric (24%) than those without an Afrocentric identity (13%). After adjustment for covariates, Afrocentric participants were 1.9 times (CI: 1.1-3.6) more likely to be lost to follow up than participants without this identity type.
  
  
  CONCLUSIONS
  Assessing EI of AAs in research studies may help identify groups at risk for dropout and/or non-response.
authors.affiliation: University of Michigan School of Public Health, Department of Health Behavior & Health Education, Ann Arbor, MI 48109, United States. alangfor@umich.edu
authors.forename: Aisha T
authors.initials: AT
authors.lastname: Langford
authors.forename: Ken
authors.initials: K
authors.lastname: Resnicow
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Davis
authors.forename: Gwen L
authors.initials: GL
authors.lastname: Alexander
authors.forename: Josephine
authors.initials: J
authors.lastname: Calvi
authors.forename: Cheryl
authors.initials: C
authors.lastname: Weise
authors.forename: Dennis
authors.initials: D
authors.lastname: Tolsma
mesh_terms: D000328:Adult; D001741:Black or African American; D000368:Aged; D016001:Confidence Intervals; D005006:Ethnicity; D005260:Female; D005638:Fruit; D006293:Health Promotion / Q000379:methods*; D006302:Health Services Research / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009752:Nutritional Status; D016017:Odds Ratio; D018579:Patient Selection; D012933:Social Identification; D014481:United States; D014675:Vegetables; D055815:Young Adult