Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial

Lesley F. Tinker, Milagros C. Rosal, Anne F. Young, Michael G. Perri, Ruth E. Patterson, Linda Van Horn, Annlouise R. Assaf, Deborah J. Bowen, Judith Ockene, Jennifer Hays-Grudo, Lieling Wu

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

Objective: To identify predictors of dietary change to and maintenance of a low-fat eating pattern (<20% energy from fat, ≥5 servings fruits/vegetables daily, and ≥6 servings grains daily) among a cohort of postmenopausal women. Candidate predictors included intrapersonal, interpersonal, intervention program characteristics, and clinical center. Design: Longitudinal study within the Women's Health Initiative Dietary Modification Trial. Dietary change was evaluated after 1 year of participation in the Women's Health Initiative Dietary Modification Trial, and dietary maintenance after 3 years. Subjects: Postmenopausal women aged 50 to 79 years at baseline who were randomized to the intervention arm of the Women's Health Initiative Dietary Modification Trial (n=19,541). Statistical analysis: Univariate and multivariate linear regression analysis was performed and associations evaluated between candidate predictors and each of the three dietary goals: percent energy from fat, fruit/vegetable servings, and grain servings. Results: Year 1 (change) predictors of percent energy from fat (P<0.005) included being younger (β=2.12; 70 to 79 years vs 50 to 59 years), more educated (β=-.69; college vs high school), more optimistic (β=-.07), attending more sessions (β=-.69), and submitting more self-monitoring records (β=-.74). At year 3 (maintenance), the predictors of percent energy from fat (P<0.005) included attending more sessions (β=-.65) and submitting more self-monitoring scores (β=-.71). The analytic model predicted 22% of the variance in fat intake at year 1 and 27% at year 3 (P<0.01). Conclusions: The strongest predictors of dietary change and maintenance were attending intervention sessions and self-monitoring dietary intake. Novel was the finding that optimism predicted dietary change.

Original languageEnglish
Pages (from-to)1155-1165
Number of pages11
JournalJournal of the American Dietetic Association
Volume107
Issue number7
DOIs
StatePublished - 1 Jul 2007

Fingerprint

Diet Therapy
women's health
Women's Health
Fats
Maintenance
lipids
energy
monitoring
Vegetables
vegetables
Fruit
high schools
fruits
fat intake
longitudinal studies
eating habits
food intake
regression analysis
statistical analysis
Longitudinal Studies

Cite this

Tinker, L. F., Rosal, M. C., Young, A. F., Perri, M. G., Patterson, R. E., Van Horn, L., ... Wu, L. (2007). Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial. Journal of the American Dietetic Association, 107(7), 1155-1165. https://doi.org/10.1016/j.jada.2007.04.010
Tinker, Lesley F. ; Rosal, Milagros C. ; Young, Anne F. ; Perri, Michael G. ; Patterson, Ruth E. ; Van Horn, Linda ; Assaf, Annlouise R. ; Bowen, Deborah J. ; Ockene, Judith ; Hays-Grudo, Jennifer ; Wu, Lieling. / Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial. In: Journal of the American Dietetic Association. 2007 ; Vol. 107, No. 7. pp. 1155-1165.
@article{dbeaefc6fce54c279203d7dcc296505f,
title = "Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial",
abstract = "Objective: To identify predictors of dietary change to and maintenance of a low-fat eating pattern (<20{\%} energy from fat, ≥5 servings fruits/vegetables daily, and ≥6 servings grains daily) among a cohort of postmenopausal women. Candidate predictors included intrapersonal, interpersonal, intervention program characteristics, and clinical center. Design: Longitudinal study within the Women's Health Initiative Dietary Modification Trial. Dietary change was evaluated after 1 year of participation in the Women's Health Initiative Dietary Modification Trial, and dietary maintenance after 3 years. Subjects: Postmenopausal women aged 50 to 79 years at baseline who were randomized to the intervention arm of the Women's Health Initiative Dietary Modification Trial (n=19,541). Statistical analysis: Univariate and multivariate linear regression analysis was performed and associations evaluated between candidate predictors and each of the three dietary goals: percent energy from fat, fruit/vegetable servings, and grain servings. Results: Year 1 (change) predictors of percent energy from fat (P<0.005) included being younger (β=2.12; 70 to 79 years vs 50 to 59 years), more educated (β=-.69; college vs high school), more optimistic (β=-.07), attending more sessions (β=-.69), and submitting more self-monitoring records (β=-.74). At year 3 (maintenance), the predictors of percent energy from fat (P<0.005) included attending more sessions (β=-.65) and submitting more self-monitoring scores (β=-.71). The analytic model predicted 22{\%} of the variance in fat intake at year 1 and 27{\%} at year 3 (P<0.01). Conclusions: The strongest predictors of dietary change and maintenance were attending intervention sessions and self-monitoring dietary intake. Novel was the finding that optimism predicted dietary change.",
author = "Tinker, {Lesley F.} and Rosal, {Milagros C.} and Young, {Anne F.} and Perri, {Michael G.} and Patterson, {Ruth E.} and {Van Horn}, Linda and Assaf, {Annlouise R.} and Bowen, {Deborah J.} and Judith Ockene and Jennifer Hays-Grudo and Lieling Wu",
year = "2007",
month = "7",
day = "1",
doi = "10.1016/j.jada.2007.04.010",
language = "English",
volume = "107",
pages = "1155--1165",
journal = "Journal of the American Dietetic Association",
issn = "0002-8223",
publisher = "Elsevier USA",
number = "7",

}

Tinker, LF, Rosal, MC, Young, AF, Perri, MG, Patterson, RE, Van Horn, L, Assaf, AR, Bowen, DJ, Ockene, J, Hays-Grudo, J & Wu, L 2007, 'Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial', Journal of the American Dietetic Association, vol. 107, no. 7, pp. 1155-1165. https://doi.org/10.1016/j.jada.2007.04.010

Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial. / Tinker, Lesley F.; Rosal, Milagros C.; Young, Anne F.; Perri, Michael G.; Patterson, Ruth E.; Van Horn, Linda; Assaf, Annlouise R.; Bowen, Deborah J.; Ockene, Judith; Hays-Grudo, Jennifer; Wu, Lieling.

In: Journal of the American Dietetic Association, Vol. 107, No. 7, 01.07.2007, p. 1155-1165.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Predictors of Dietary Change and Maintenance in the Women's Health Initiative Dietary Modification Trial

AU - Tinker, Lesley F.

AU - Rosal, Milagros C.

AU - Young, Anne F.

AU - Perri, Michael G.

AU - Patterson, Ruth E.

AU - Van Horn, Linda

AU - Assaf, Annlouise R.

AU - Bowen, Deborah J.

AU - Ockene, Judith

AU - Hays-Grudo, Jennifer

AU - Wu, Lieling

PY - 2007/7/1

Y1 - 2007/7/1

N2 - Objective: To identify predictors of dietary change to and maintenance of a low-fat eating pattern (<20% energy from fat, ≥5 servings fruits/vegetables daily, and ≥6 servings grains daily) among a cohort of postmenopausal women. Candidate predictors included intrapersonal, interpersonal, intervention program characteristics, and clinical center. Design: Longitudinal study within the Women's Health Initiative Dietary Modification Trial. Dietary change was evaluated after 1 year of participation in the Women's Health Initiative Dietary Modification Trial, and dietary maintenance after 3 years. Subjects: Postmenopausal women aged 50 to 79 years at baseline who were randomized to the intervention arm of the Women's Health Initiative Dietary Modification Trial (n=19,541). Statistical analysis: Univariate and multivariate linear regression analysis was performed and associations evaluated between candidate predictors and each of the three dietary goals: percent energy from fat, fruit/vegetable servings, and grain servings. Results: Year 1 (change) predictors of percent energy from fat (P<0.005) included being younger (β=2.12; 70 to 79 years vs 50 to 59 years), more educated (β=-.69; college vs high school), more optimistic (β=-.07), attending more sessions (β=-.69), and submitting more self-monitoring records (β=-.74). At year 3 (maintenance), the predictors of percent energy from fat (P<0.005) included attending more sessions (β=-.65) and submitting more self-monitoring scores (β=-.71). The analytic model predicted 22% of the variance in fat intake at year 1 and 27% at year 3 (P<0.01). Conclusions: The strongest predictors of dietary change and maintenance were attending intervention sessions and self-monitoring dietary intake. Novel was the finding that optimism predicted dietary change.

AB - Objective: To identify predictors of dietary change to and maintenance of a low-fat eating pattern (<20% energy from fat, ≥5 servings fruits/vegetables daily, and ≥6 servings grains daily) among a cohort of postmenopausal women. Candidate predictors included intrapersonal, interpersonal, intervention program characteristics, and clinical center. Design: Longitudinal study within the Women's Health Initiative Dietary Modification Trial. Dietary change was evaluated after 1 year of participation in the Women's Health Initiative Dietary Modification Trial, and dietary maintenance after 3 years. Subjects: Postmenopausal women aged 50 to 79 years at baseline who were randomized to the intervention arm of the Women's Health Initiative Dietary Modification Trial (n=19,541). Statistical analysis: Univariate and multivariate linear regression analysis was performed and associations evaluated between candidate predictors and each of the three dietary goals: percent energy from fat, fruit/vegetable servings, and grain servings. Results: Year 1 (change) predictors of percent energy from fat (P<0.005) included being younger (β=2.12; 70 to 79 years vs 50 to 59 years), more educated (β=-.69; college vs high school), more optimistic (β=-.07), attending more sessions (β=-.69), and submitting more self-monitoring records (β=-.74). At year 3 (maintenance), the predictors of percent energy from fat (P<0.005) included attending more sessions (β=-.65) and submitting more self-monitoring scores (β=-.71). The analytic model predicted 22% of the variance in fat intake at year 1 and 27% at year 3 (P<0.01). Conclusions: The strongest predictors of dietary change and maintenance were attending intervention sessions and self-monitoring dietary intake. Novel was the finding that optimism predicted dietary change.

UR - http://www.scopus.com/inward/record.url?scp=34250852892&partnerID=8YFLogxK

U2 - 10.1016/j.jada.2007.04.010

DO - 10.1016/j.jada.2007.04.010

M3 - Article

C2 - 17604744

AN - SCOPUS:34250852892

VL - 107

SP - 1155

EP - 1165

JO - Journal of the American Dietetic Association

JF - Journal of the American Dietetic Association

SN - 0002-8223

IS - 7

ER -