Affiliation:
1. Caroline C. Horwath, PG Dipl Nutr & Dietetics, PhD, is with the Department of Human Nutrition, University of Otago, Dunedin, New Zealand. Claudio R. Nigg, PhD; and Kristen T. Wong, MPH, are with the Department of Public Health Sciences, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii. Rob W. Motl, PhD, is with the Department of Kinesiology, University of Illinois at Urbana Champaign. Rod K. Dishman, PhD, is with the Department of Kinesiology, University of Georgia,...
Abstract
Purpose. Test the applicability of the transtheoretical model (TTM) to adult fruit/vegetable consumption. Design. Cross-sectional random-digit dial survey. Setting. Hawaii. Subjects. 700 (62.6% female; age [mean ± SD], 47 ± 17.1 years; education [mean ± SD], 14.6 ± 2.8 years; 35.0% white, 31.1% Asian, 22.1% native Hawaiian/Pacific Islander, 11.8% other). Measures. Stages, processes, self-efficacy, decisional balance, and self-reported fruit/vegetable consumption. Analysis. Confirmatory factor analysis tested the factor structure. Analyses of variance were used to explore stage differences in constructs. Results. Stage distribution was precontemplation (33%), contemplation (4%), preparation (37%), action (3%), and maintenance (23%). A 10-factor process model with two higher-order correlated factors (experiential and behavioral) provided the best data fit (X2 = 1446.12; df = 366; p < .0001; comparative fit index [CFI] = .89; standardized root mean square residual [SRMR] = .05). The self-efficacy structure fit the data well (X2 = 81.86; df = 9; p < .0001; CFI = .94; SRMR = .04), as did the decisional balance structure (X2 = 37.42; df = 19;p = .007; CFI = .99; SRMR = .02). Processes, self-efficacy, decisional balance, and fruit/vegetable consumption behavior differed significantly by stage, with medium effect sizes for most variables. Conclusion. The variables revealed adequate fit to the theorized measurement models. TTM predictions regarding stage differences in self-efficacy, pros and cons, and fruit/vegetable consumption were confirmed; however, most experiential and behavioral processes increased in the early stages and then leveled off.
Subject
Public Health, Environmental and Occupational Health,Health (social science)
Cited by
34 articles.
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