Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
J Health Commun. 2011 Mar;16(3):282-99. doi: 10.1080/10810730.2010.532294.
Health communication interventions have been effective in promoting fruit and vegetable consumption (FVC). To explore mechanisms underlying health communication effectiveness, the authors investigated whether information processes mediated the relationship between health communication and FVC, using data from NC STRIDES. NC STRIDES tested the efficacy of two health communication strategies to promote FVC among a diverse population-based sample of older adults. Participants were randomized to 1 of 4 groups: control, tailored print communication (TPC), telephone motivational interviewing (TMI), or combined (TPC + TMI). To analyze data from 469 participants, the authors constructed multi-sample structural equation models. Information processes mediated the effect of TMI and TPC + TMI on FVC. TMI had an indirect effect on FVC through relevance of the communications. TPC + TMI influenced FVC through perceived relevance of the communications, trust in the communications, and dose recall via two paths. In the first path, relevance was associated with trust. Trust was associated with recall, and greater recall predicted FVC. In the second path, relevance was associated with dose recall, and more recall predicted FVC. Thus, the authors found that key information processes mediated the relationship between a health communication intervention and FVC. Further research should investigate ways to enhance relevance, trust, and recall during the delivery of interventions.
健康传播干预措施在促进水果和蔬菜消费（FVC）方面已被证明是有效的。为了探究健康传播效果的机制，作者利用来自 NC STRIDES 的数据，调查了信息处理是否在健康传播与 FVC 之间的关系中起中介作用。NC STRIDES 测试了两种健康传播策略在多样化的基于人群的老年人群体中促进 FVC 的效果。参与者被随机分配到 4 个组之一：对照组、定制印刷通讯（TPC）、电话动机访谈（TMI）或联合组（TPC + TMI）。为了分析来自 469 名参与者的数据，作者构建了多样本结构方程模型。信息处理中介了 TMI 和 TPC + TMI 对 FVC 的影响。TMI 通过通讯的相关性对 FVC 产生间接影响。TPC + TMI 通过通讯的相关性、对通讯的信任和通过两条路径的剂量回忆对 FVC 产生影响。在第一条路径中，相关性与信任相关。信任与回忆相关，更多的回忆预测 FVC。在第二条路径中，相关性与剂量回忆相关，更多的回忆预测 FVC。因此，作者发现关键信息处理在健康传播干预与 FVC 之间的关系中起中介作用。进一步的研究应该探讨在干预措施实施过程中增强相关性、信任和回忆的方法。
