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Obesity Modifies the Association of Race/Ethnicity with Medication Adherence in the CARDIA Study

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  • Maribel Salas
  • Catarina Kiefe
  • Pamela Schreiner
  • Yongin Kim
  • Lucia Juarez
  • Sharina Person
  • O. Williams

Abstract

Objective: To assess associations between race/ethnicity and medication adherence, and the potential modifying effects of weight category (normal, overweight, obese) in a community-based sample. Study design and setting: We studied 1355 participants from the CARDIA (Coronary Artery Risk Development in Young Adults) study who were taking prescription medications in 2000-1. Medication adherence, as rated on the four-item Morisky medication adherence scale (score of 4=maximum adherence), was reported for all participants. Results: The mean age ± SD of participants was 40 ± 3.6 years; 45% were African American and 36% were male. Overall, Whites had a higher proportion of maximum adherence than African Americans (59 vs 41%, respectively; p=0.001). However, this difference was statistically significant only for participants within the normal weight category, of whom 54% of Whites were maximally adherent versus 35% of African Americans (p > 0.05). After adjustment for possible confounding covariates, race/ethnicity was associated with adherence only in those of normal weight: the odds ratio for maximum adherence in Whites versus African Americans of normal weight was 1.98 (95% CI 1.13, 3.47). Within race/ethnicity subgroups, weight category was associated with adherence in Whites but not in African Americans. Conclusion: Weight category modifies the association of race/ethnicity with medication adherence. The high levels of non-adherence observed among African Americans and obese and overweight Whites bodes poorly for treatment of obesity-associated diseases such as cardiovascular disease or diabetes mellitus. Copyright Adis Data Information BV 2008

Suggested Citation

  • Maribel Salas & Catarina Kiefe & Pamela Schreiner & Yongin Kim & Lucia Juarez & Sharina Person & O. Williams, 2008. "Obesity Modifies the Association of Race/Ethnicity with Medication Adherence in the CARDIA Study," The Patient: Patient-Centered Outcomes Research, Springer;International Academy of Health Preference Research, vol. 1(1), pages 41-54, January.
    • Handle: RePEc:spr:patien:v:1:y:2008:i:1:p:41-54
    DOI: 10.2165/01312067-200801010-00007
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    1. Monane, M. & Bohn, R.L. & Gurwitz, J.H. & Glynn, R.J. & Levin, R. & Avorn, J., 1996. "Compliance with antihypertensive therapy among elderly medicaid enrollees: The roles of age, gender, and race," American Journal of Public Health, American Public Health Association, vol. 86(12), pages 1805-1808.
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