University of Otago, Dunedin, New Zealand.
Am J Health Promot. 2013 Jul-Aug;27(6):351-7. doi: 10.4278/ajhp.110516-QUAN-201. Epub 2013 Feb 11.
To determine whether Transtheoretical Model (TTM) constructs differ between individuals making successful versus unsuccessful stage transitions for consumption of five or more servings of fruit and vegetables each day and thus provide a useful basis for designing health promotion interventions.
Longitudinal, observational study. A randomly selected, multiethnic cohort of adults assessed at 6-month intervals over 2 years.
General community, Hawaii.
There were 700 participants (62.6% female; mean = 47 ± 17.1 years; 31.1% Asian, 22.1% Native Hawaiian/Pacific Islander, 35.0% Caucasian; 25.1% participation rate).
Stage of readiness, experiential and behavioral processes of change, pros, cons, self-efficacy, and self-reported fruit and vegetable consumption.
The study used t-tests to determine which TTM variable scores differed consistently between those making "successful" versus "unsuccessful " stage transitions from precontemplation, preparation, and maintenance. Sample sizes for contemplation and action prohibited similar analyses.
Compared to those remaining in precontemplation, individuals successfully progressing from precontemplation showed significantly greater use of behavioral processes (collectively and self-liberation) and consciousness raising (p < .001). However, only self-liberation demonstrated significant differences consistently over time.
This longitudinal investigation reveals that TTM behavioral processes, particularly self-liberation, predict successful transition out of precontemplation for adult fruit and vegetable consumption, suggesting that public health messages tailored according to these TTM variables may be effective for this group. However, for adults prepared to adopt or maintain fruit and vegetable consumption, tailoring based on variables from other theories is needed.
确定在每天食用五份或更多份水果和蔬菜方面，成功实现和未成功实现阶段转变的个体之间，跨理论模型（TTM）结构是否存在差异，从而为设计健康促进干预措施提供有用的基础。
纵向观察性研究。在两年的时间里，以 6 个月为间隔，对一个随机选择的、多民族的成年人队列进行评估。
夏威夷的普通社区。
共有 700 名参与者（62.6%为女性；平均年龄=47±17.1 岁；31.1%为亚洲人，22.1%为夏威夷原住民/太平洋岛民，35.0%为白种人；参与率为 25.1%）。
准备就绪阶段、经验和行为改变过程、赞成和反对意见、自我效能感以及自我报告的水果和蔬菜摄入量。
该研究使用 t 检验来确定在从沉思前、准备和维持阶段成功实现“成功”与“不成功”阶段转变的个体中，哪些 TTM 变量得分始终存在差异。考虑到沉思和行动阶段的样本量，禁止进行类似的分析。
与仍处于沉思前阶段的个体相比，成功从不思进取阶段向其他阶段过渡的个体在使用行为过程（整体和自我解放）和提高意识方面显著增加（p<.001）。然而，只有自我解放在整个过程中表现出显著差异。
这项纵向研究表明，TTM 行为过程，特别是自我解放，可预测成年人在水果和蔬菜消费方面成功从不思进取阶段过渡，这表明根据这些 TTM 变量定制的公共卫生信息可能对该群体有效。然而，对于准备采取或维持水果和蔬菜消费的成年人，需要根据其他理论的变量进行定制。
