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Randomized trial of an intervention to improve mammography utilization among a triracial rural population of women.

Paskett E, Tatum C, Rushing J, Michielutte R, Bell R, Long Foley K, Bittoni M, Dickinson SL, McAlearney AS, Reeves K

Division of Epidemiology, The Ohio State University School of Public Health, Columbus, OH 43210, USA. electra.paskett@osumc.edu

INTRODUCTION: Mammography is underused by certain groups of women, in particular poor and minority women. We developed a lay health advisor (LHA) intervention based on behavioral theories and tested whether it improved mammography attendance in Robeson County, NC, a rural, low-income, triracial (white, Native American, African American) population. METHODS: A total of 851 women who had not had a mammogram within the past year were randomly assigned to the LHA intervention (n = 433) or to a comparison arm (n = 418) during 1998-2002. Rates of mammography use after 12-14 months (as verified by medical record review) were compared using a chi-square test. Baseline and follow-up (at 12-14 months) surveys were used to obtain information on demographics, risk factors, and barriers, beliefs, and knowledge about mammography. Linear regression, Mantel-Haenszel statistics, and logistic regression were used to compare barriers, beliefs, and knowledge from baseline to follow-up and to identify baseline factors associated with mammography. RESULTS: At follow-up, 42.5% of the women in the LHA group and 27.3% of those in the comparison group had had a mammogram in the previous 12 months (relative risk = 1.56, 95% confidence interval [CI] = 1.29 to 1.87). Compared with those in the comparison group, women in the LHA group displayed statistically significantly better belief scores (difference = 0.46 points on a 0-10 scale, 95% CI = 0.15 to 0.77) and reduced barriers at follow-up (difference = -0.77 points, 95% CI = -1.02 to -0.53), after adjusting for baseline scores. CONCLUSIONS: LHA interventions can improve mammography utilization. Future studies are needed to assess strategies to disseminate effective LHA interventions to underserved populations.

Published 6 September 2006 in J Natl Cancer Inst, 98(17): 1226-37.
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