Mexican Americans are more likely to be obese than non-Hispanic whites, yet little research has been conducted to identify weight control strategies effective with this ethnic group. The purpose of the proposed study is to evaluate an intervention that combines individual- oriented behavioral strategies with more culturally compatible strategies derived from social support theory. A total of 360 obese Mexican-American women between the ages of 18 and 65 years will be recruited from neighborhood units in Starr County, Texas. Subjects will be randomly assigned to either an intervention group or a wait-listed control group. The wait-listed group will receive the intervention one year after the intervention group, and will serve as a no-treatment control group for the pretreatment, post- intervention (6 month), and post-maintenance (12-month) measurement. Both groups will be assessed at six-month intervals for up to two years following the intervention. The intervention will consist of 24 weekly classes with bilingual registered dietitians and behavioral therapists conducting groups of 10 women from neighborhood blocks. The last four weekly classes will instruct women in leading their own self-help groups. During the six-month maintenance period, the peer-led support groups will continue to meet weekly, with additional therapist and dietitian contact provided at one session per month. Continued activity of the peer-led neighborhood groups will be monitored following the maintenance period. Measures of obesity (weight, body mass index, and circumferences) will assess changes in obesity and body fat distribution. Serum glucose, insulin, glycosylated hemoglobin, lipids, and blood pressure will also be measured to determine the effects of weight loss on diabetes and CVD risk factors. Food frequencies will assess changes in dietary intake, and measures of social support, self-efficacy, acculturation, and demographic characteristics will be administered. It is hypothesized that 1) the intervention will result in significant decreases in weight, 2) weight loss will be related to decreases in other CVD risk factors, and 3) social support and adherence to intervention and maintenance strategies will be positively associated with weight loss and maintenance of weight loss.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Demonstration and Dissemination Projects (R18)
Project #
5R18HL047052-04
Application #
2223363
Study Section
Special Emphasis Panel (ZHL1-CCT-I (M1))
Project Start
1993-08-01
Project End
1998-07-31
Budget Start
1996-08-01
Budget End
1998-07-31
Support Year
4
Fiscal Year
1996
Total Cost
Indirect Cost
Name
Baylor College of Medicine
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
074615394
City
Houston
State
TX
Country
United States
Zip Code
77030
Foreyt, John P; Poston, Walker S Carlos (2002) Consensus view on the role of dietary fat and obesity. Am J Med 113 Suppl 9B:60S-62S
Poston 2nd, W S; Haddock, C K; Olvera, N E et al. (2001) Evaluation of a culturally appropriate intervention to increase physical activity. Am J Health Behav 25:396-406
Foreyt, J P; Poston 2nd, W S (1999) The challenge of diet, exercise and lifestyle modification in the management of the obese diabetic patient. Int J Obes Relat Metab Disord 23 Suppl 7:S5-11
Poston 2nd, W S; Foreyt, J P (1999) Obesity is an environmental issue. Atherosclerosis 146:201-9
Poston 2nd, W S; Olvera, N E; Yanez, C et al. (1998) Evaluation of the factor structure and psychometric characteristics of the General Well-Being Schedule (GWB) with Mexican American women. Women Health 27:51-64
Raffel, L J; Robbins, D C; Norris, J M et al. (1996) The GENNID Study. A resource for mapping the genes that cause NIDDM. Diabetes Care 19:864-72
Ericsson, M; Poston 2nd, W S; Foreyt, J P (1996) Common biological pathways in eating disorders and obesity. Addict Behav 21:733-43
Foreyt, J P; Poston 2nd, W S; Goodrick, G K (1996) Future directions in obesity and eating disorders. Addict Behav 21:767-78