Health Education Research, Vol. 8, No. 2, 193-204, 1993
© 1993 Oxford University Press
research-article |
Process variables as predictors of risk factor changes in a family health behavior change program
1UCSD/SDSU Joint Doctoral Program in Clinical Psychology (now at Department of Psychiary, University of California, San Francisco)
2Psychology San Diego, CA 92182
4Health Science, San Diego State University San Diego, CA 92182
3Family and Preventive Medicine
5Psychiatry San Diego, La Jolla, CA 92093, USA
6Community Pediatrics, University of California San Diego, La Jolla, CA 92093, USA
The purpose of the present study was to determine the extent to which intervention process measures are useful in predicting changes in cardiovascular disease (CVD) risk factors among subjects exposed to interventions. Subjects were 99 adult and 105 children who participated in an 18 session, family-based diet and exercise change program. During the intervention, each participant self-monitonally, diet and exercise for 12 weeks. Additinally, attendance, session evaluation, confidence to achieve goals and goal achievement data were collected each week. The intervention was successful in changing diet, blood pressure and cholesterol levels, but did not produce significant changes in exercise or body mass index. Stepwise multiple regression analyses were conducted for each outcome variable at the 1 and 2 year follow-ups. Ethnicity and sex were first forced into each regression. None of the process measures consistently predicted multiple outcomes in adults and children. The pattern of results provides limited support for the hypothesis that intervention process variables such as attendance, adherence to selfmonitoring, achievement of goals and attitude toward sessions partially mediate intervention effects. It is concluded that process measures should be collected in health behavior change programs so that process-outcome relation ships can be further explored.
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