Applying Theory of Planned Behavior to Fruit and Vegetable Consumption of Young Adolescents

American Journal of Health Promotion - Tập 16 Số 4 - Trang 189-197 - 2002
Nanna Lien1, Leslie A. Lytle, Kelli A. Komro
1Institute for Nutrition Research, University of Oslo, PO Box 1046, Blindern 0316 Oslo, Norway.

Tóm tắt

Purpose. The purpose of this research was to investigate how well Theory of Planned Behavior (TPB) predicted frequency of consumption of fruits and vegetables among seventh graders and to investigate whether gender or socioeconomic status (SES) had moderating effects on the relationships between the constructs in the model. Design. Two identical self-administered paper and pencil surveys were distributed 6 months apart. Path analyses of the TPB models by gender and SES were performed with AMOS software. Setting. The study occurred in eight middle schools from school districts in the Minneapolis—St.Paul metropolitan area, where a minimum of 20% of the students qualified for free or reduced-price meals. Subjects. Of the invited seventh graders, 1406 (74%) completed data for the model constructs at baseline and for behavior at interim data collection. Measures. We assessed frequency of consumption of fruits and vegetables and attitudes, subjective norms, barriers, and intentions related to this behavior. Three levels of SES were created based on questions about free lunch, parents' education, and work. Results. No significant direct effects of attitudes and subjective norms on behavior were found, but for barriers, both indirect effects through intentions and direct effects on behavior were significant. Seven percent of the variation in the frequency of fruit and vegetable consumption and 31% of the variation in intention to eat more fruits and vegetables were explained by the model. Gender appeared to have moderating effects on the relationships between attitudes and intention and between intentions and behavior in the model. There were no moderator effects of SES, but the larger dropout rates from the low-SES group could have caused the groups to become more homogeneous. Conclusion. The data fit the model well; still, large proportions of the variance in the frequency of consumption of fruits and vegetables were unexplained. This may be related to the operationalization of the model constructs or to missing important factors in the model. Furthermore, there appeared to be strong relationships between subjective norms or barriers and intentions as well as gender differences in the strengths of the relationships in the model that may have implications for intervention methods or messages.

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Tài liệu tham khảo

World Cancer Research Fund/American Institute for Cancer Research, 1997, Food, Nutrition and the Prevention of Cancer: A Global Perspective

10.1093/ije/26.1.1

10.1006/pmed.1997.0209

10.4278/0890-1171-14.4.222

World Health Organization (WHO), 2000, Health and Health Behaviour Among Young People

10.1006/pmed.2001.0874

10.2105/AJPH.84.7.1121

10.4278/0890-1171-10.2.98

Contento I, 1995, J Nutr Educ., 27, 279, 10.1016/S0022-3182(12)80086-0

10.1017/S0007114598001032

10.1016/S1047-2797(97)80011-7

10.1007/978-3-642-69746-3_2

Ajzen I, 1988, Attitudes, Personality and Behavior

10.1016/0749-5978(91)90020-T

10.1093/her/3.3.273

10.1111/j.1559-1816.1998.tb01685.x

10.1111/j.2044-8309.1995.tb01058.x

10.4278/0890-1171-11.2.87

10.1006/pmed.1996.0082

Sweeting H, 1994, Eur J Clin Nutr., 48, 736

10.1016/S0002-8223(98)00156-4

10.1111/j.1467-842X.1998.tb01419.x

10.1016/S0022-3182(12)80794-1

10.1177/140349489502300203

10.1038/sj.ejcn.1600644

Roos E, 1996, Eur J Clin Nutr., 50, 753

10.1111/j.1365-277X.1995.tb00292.x

Rutter DR, 1994, Social Psychology and Health: European Perspectives, 195

10.1037/0022-3514.51.6.1173

10.2105/AJPH.88.8.1216

Kline RB, 1998, Principles and Practice of Structural Equation Modeling

Arbuckle JL, 1995, Amos 4.0 User's Guide

10.1016/1054-139X(95)00125-C

10.1111/j.1559-1816.2000.tb02431.x

10.1006/appe.1995.0062

10.1093/her/11.3.299

10.1037/0278-6133.16.3.272

Turrell G, 1998, Am J Health Behav., 22, 342

10.1006/appe.1999.0269

10.1348/014466699164121

10.1017/S0029665199001093

10.1016/S0022-3182(99)70381-X

10.1093/her/11.4.453

McKinlay JB, 2000, Am J Public Health, 90, 25, 10.2105/AJPH.90.1.25

10.1080/08870449808407426

10.1111/j.1559-1816.1998.tb01679.x

10.1080/08870440008400297

10.1046/j.1365-277X.1998.00084.x

10.1093/her/16.2.187