|3R01CA069668-04S1 Interpret this number
|Dietary Change Through African American Churches
DESCRIPTION: The study is a randomized intervention effectiveness trial
with three experimental conditions. Group 1 (Controls=C) will receive
standard nutrition education materials; Group 2 will receive a
multicomponent intervention (MCI=Tx1) that will include culturally sensitive
written materials, audio tapes, a video, and one telephone booster cal;
Group 3 will receive the same intervention as Group 2, plus three additional
telephone calls (MCI+3T=Tx2). Subjects will be recruited at Health Fairs
conducted Atlanta churches. There will be three data collection points;
baseline, 6 month, and 1 year follow up. Baseline and 1 year follow up data
(with the exception of 24hr recall that will be collected by phone) will be
collected at health fairs; 6 month follow up data will be collected by
phone. Conducting followup health fairs a year (rather than 6 months) after
baseline will minimize seasonal variation in key outcome variables, e.g.,
diet, lipids, and carotenoids. Recruitment and retention of subjects will
be enhanced with incentives such as raffle tickets. In addition, all Tx and
C subjects will be contacted by telephone and mail to encourage attendance
at the 1 year follow up health fair.
A cluster randomization design will be employed. Churches rather than
individuals will be assigned to condition and individuals will be nested in
churches. The effect of cluster randomization is incorporated in sample
size calculations and data analysis strategies. Baseline projections are
278 individuals in Tx1, 278 in Tx2, and 331 in C, to detect proposed
treatment effects, accounting for attrition and intracluster correlation.
It is estimated that approximately 9-15 churches, 3-5 per condition, will be
required to yield the requisite number of participants at posttest. The
intervention will be implemented in several partially overlapping cycles
over the 2 year intervention phase.
None. See parent grant details.