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Intervention completion rates among African Americans in a randomized effectiveness trial for diet and physical activity changes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Halbert, Chanita Hughes Bellamy, Scarlett Briggs, Vanessa Bowman, Marjorie Delmoor, Ernestine Johnson, Jerry C. Kumanyika, Shiriki Melvin, Cathy Purnell, Joseph Rogers, Rodney Weathers, Benita
Description	Author Affiliation: Halbert CH ( Authors' Affiliations: Department of Psychiatry and Behavioral Sciences and Hollings Cancer Center); Bellamy S ( Department of Biostatistics and Epidemiology, Center for Clinical Epidemiology and Biostatistics); Briggs V ( Health Promotion Council of Southeastern Pennsylvania); Bowman M ( Boonshoft School of Medicine, Wright State University, Dayton, Ohio.); Delmoor E ( National Black Leadership Initiative on Cancer, Philadelphia Chapter); Johnson JC ( Department of Medicine, Division of Geriatric Medicine); Kumanyika S ( Department of Biostatistics and Epidemiology, Center for Clinical Epidemiology and Biostatistics); Melvin C ( Department of Public Health Sciences and Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina); Purnell J ( Southwest Action Coalition); Rogers R ( Christ of Calvary Community Development Corporation, Philadelphia, Pennsylvania); Weathers B ( Department of Family Medicine, University of Pennsylvania)
Abstract	BACKGROUND: The intervention completion rate is an important metric in behavioral and intervention research; trials with limited intervention completion rates may have reduced internal validity. We examined intervention completion rates among 530 African Americans who had been randomized to an integrated (INT) or disease-specific (DSE) risk education protocol as part of a comparative effectiveness trial from September 2009 to August 2012. METHODS: The interventions were developed by an academic-community partnership using community-based participatory research. Intervention completion rates were determined based on attendance at all four intervention sessions. Intervention completers were participants who completed all four sessions and noncompleters were those who did not complete any session or only completed one to three sessions following randomization. RESULTS: Seventy-three percent of participants were intervention completers and 27% were noncompleters. There were no differences in intervention completion based on randomization to INT (72%) or DSE (75%), sociodemographic factors, or body mass index (BMI) in the total sample. Different factors were associated significantly with intervention completion within study groups. Among participants randomized to INT, the odds of intervention completion were greater with higher levels of intrinsic motivation, less exposure to information about diet and cardiovascular disease, and greater BMI. Among participants randomized to DSE, the odds of completing the intervention were associated significantly with older age and greater dietary self-efficacy. CONCLUSIONS: Many African Americans are likely to complete risk education interventions. IMPACT: Psychologic characteristics should be considered when determining intervention completion rates following randomization in behavioral and intervention trials.
File Format	HTM / HTML
ISSN	10559965
e-ISSN	15387755
DOI	10.1158/1055-9965.EPI-13-1064
Journal	Cancer Epidemiology Biomarkers & Prevention
Issue Number	7
Volume Number	23
Language	English
Publisher	American Association for Cancer Research
Publisher Date	2014-07-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Cancer epidemiology Patient Education As Topic Adolescent African Americans Diet Motivation Randomized Controlled Trial Research Support, N.i.h., Extramural
Content Type	Text
Resource Type	Article
Subject	Epidemiology Oncology

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