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Randomized Controlled Trial
. 2008 May-Jun;22(5):336-41.
doi: 10.4278/ajhp.22.5.336.

Computer-mediated intervention tailored on transtheoretical model stages and processes of change increases fruit and vegetable consumption among urban African-American adolescents

Jennifer Di Noia  1 , Isobel R Contento, James O Prochaska
Affiliations
Randomized Controlled Trial

Computer-mediated intervention tailored on transtheoretical model stages and processes of change increases fruit and vegetable consumption among urban African-American adolescents

Jennifer Di Noia et al. Am J Health Promot. 2008 May-Jun.

Abstract

Purpose: To examine the efficacy of an intervention based on the transtheoretical model (TTM) for increasing fruit and vegetable consumption among economically disadvantaged African-American adolescents.

Design: Pretest-posttest quasi-experimental study.

Setting: Youth services agencies located in New York, New Jersey, and Pennsylvania. Agencies were assigned to computer intervention (CIN) and nonintervention control study arms.

Subjects: A total of 507 African-American adolescents ages 11 to 14 years.

Intervention: Youths in the CIN arm completed four 30-minute intervention sessions tailored on TTM stages and processes of change.

Measures: Self-reported fruit and vegetable consumption and stages, pros, cons, and self-efficacy for consumption.

Analysis: Intervention effects were examined with analysis of covariance models that were controlled for demographic variables and baseline measures of each outcome. Chi-square analyses were used to examine between-arm differences in youths' stage progressions.

Results: After adjustment by covariates, pros (p < .025) and fruit and vegetable consumption (p < .001) varied significantly with study arm. Youths in the CIN arm had higher pro scores and fruit and vegetable consumption than controls. More youths in the CIN arm than in the control arm progressed to later stages and maintained recommended intake levels (p < .05).

Conclusions: A TTM-based intervention can increase fruit and vegetable intake and effect positive changes in TTM variables related to intake among economically disadvantaged African-American adolescents.

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References

    1. Van Duyn MAS, Pivonka E. Overview of the health benefits of fruit and vegetable consumption for the dietetics professional: selected literature. J Am Diet Assoc. 2000;100:1511–1521. - PubMed
    1. Krebs-Smith SM, Cook A, Subar AF, et al. Fruit and vegetable intakes of children and adolescents in the United States. Arch Pediatr Adolesc Med. 1996;150:81–86. - PubMed
    1. American Cancer Society. Cancer facts and figures for African Americans 2005–2006. [Accessed May 26, 2006]. Available at: http://www.cancer.org/downloads/STT/CAFF2005AACorrPWSecured.pdf.
    1. National Cancer Institute. Age-adjusted incidence rates and 95% confidence intervals: SEER 13 registries for 1998–2002. [Accessed May 20, 2005]. Available at: http://www.seer.cancer.gov.
    1. Prochaska JO, Velicer WF. The transtheoretical model of health behavior change. Am J Health Promot. 1997;12:38–48. - PubMed

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