Testing the predictive power of the transtheoretical model of behavior change applied to dietary fat intake.
Testing the predictive power of the transtheoretical model of behavior change applied to dietary fat intake.
复制标题
测试应用于膳食脂肪摄入的行为改变跨理论模型的预测能力。
DOI：
10.1093/her/cyn014
复制
发表时间：
2009
影响因子：
2.4
通讯作者：
Prochaska,JamesO
中科院分区：
文献类型：
--
作者：
Wright,JulieA;Velicer,WayneF;Prochaska,JamesO
这项研究评估了跨理论模型(TTM)从吸烟到饮食的预测有多好。纵向数据来自一项关于减少成人膳食脂肪摄入量的随机对照试验(n=1207)，该试验是从初级保健实践中招募的。预测能力是通过对TTM结构中预期的变化大小进行优先预测来评估的，TTM结构包括诱惑、利弊以及当个体在变化阶段之间过渡时的10个变化过程。通过测试基于吸烟数据的预测来评估泛化能力。对每个阶段进行三组预测：预想(PC)、沉思(C)和准备(PR)，根据基线阶段与12个月随访阶段确定的无进展、进展和退步的阶段过渡类别。阶段转换组之间的单变量方差分析用于计算效应大小[欧米伽平方(ω2)]。对于基于饮食数据的饮食预测，有很高的确认度：PC、C和PR分别为92%、95%和92%。对于基于吸烟数据的饮食预测，分别有77%、79%和85%得到证实，这表明具有中等程度的概括性。这项研究修正了未来对TTM应用于膳食脂肪的理论测试的效应大小估计。
This study evaluated how well predictions from the transtheoretical model (TTM) generalized from smoking to diet. Longitudinal data were used from a randomized control trial on reducing dietary fat consumption in adults (n=1207) recruited from primary care practices. Predictive power was evaluated by makinga prioripredictions of the magnitude of change expected in the TTM constructs of temptation, pros and cons, and 10 processes of change when an individual transitions between the stages of change. Generalizability was evaluated by testing predictions based on smoking data. Three sets of predictions were made for each stage: Precontemplation (PC), Contemplation (C) and Preparation (PR) based on stage transition categories of no progress, progress and regression determined by stage at baseline versus stage at the 12-month follow-up. Univariate analysis of variance between stage transition groups was used to calculate the effect size [omega squared (ω2)]. For diet predictions based on diet data, there was a high degree of confirmation: 92%, 95% and 92% for PC, C and PR, respectively. For diet predictions based on smoking data, 77%, 79% and 85% were confirmed, respectively, suggesting a moderate degree of generalizability. This study revised effect size estimates for future theory testing on the TTM applied to dietary fat.