How do socio-economic status, perceived economic barriers and nutritional benefits affect quality of dietary intake among US adults?
How do socio-economic status, perceived economic barriers and nutritional benefits affect quality of dietary intake among US adults?
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DOI：
10.1038/sj.ejcn.1602700
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发表时间：
2008-03-01
影响因子：
4.7
通讯作者：
Wang, Y.
中科院分区：
文献类型：
--
作者：
Beydoun, M. A.;Wang, Y.
背景：社会经济因素可能影响饮食质量，可能在性别和种族上有所不同。这种关联的机制在很大程度上仍然是未知的。目的：我们研究了社会经济地位（SES）、食品价格感知障碍（PBFP）和饮食质量感知效益（PBDQ）对饮食质量指标和指数（DQI(j,k)）的独立影响，不分性别和种族。此外，我们通过PBFP和PBDQ估计了SES对DQI（j,k）影响的中介比例。方法：采用1994-96年美国个人食物摄入持续调查（CSFII）和饮食与健康知识调查（DHKS）两项横断面调查的数据。我们的样本包括4356名年龄在20-65岁之间的美国成年人。采用主成分分析，以家庭人均收入和受教育程度作为衡量SES的指标，采用11项量表来衡量PBDQ。PBFP定义为食品价格得分相对于营养的重要性之比。DQI（j,k）采用一组指标和健康饮食指数两项指标进行评价。结果：SES、PBFP、PBDQ和DQI（j,k）的相关性在性别和民族之间存在显著差异。PBFP在SES与DQI(j)指标（能量、脂肪摄入、钠和单糖消耗）之间起中介作用（中介比例bbb10 %），但PBDQ不起中介作用。结论：SES、PBFP和PBDQ均影响膳食摄入，且因种族和性别而异。SES对DQIj、k的积极影响可能是由PBFP介导的，而不是PBDQ作为独立的保护因子介导的。营养教育对促进健康饮食很重要。
Background: Socio-economic factors may affect diet quality, perhaps differentially across gender and ethnicity. The mechanism of this association is still largely unknown. Objectives: We examined the independent effects of socio-economic status (SES), perceived barrier of food price (PBFP) and perceived benefit of diet quality (PBDQ) on diet quality indicators and indices (DQI(j,k)), across gender and ethnicity. Additionally, we estimated the mediation proportion of the effect of SES on DQI(j,k) through PBFP and PBDQ.Methods: Data from two cross-sectional surveys, the Continuing Survey of Food Intakes by Individuals (CSFII) and Diet and Health Knowledge Survey (DHKS) 1994-96 were used. Our sample consisted of 4356 US adults aged 20-65 years. With principal components analysis, SES ( an index) was measured using household income per capita and education, and PBDQ was measured using an 11-item scale. PBFP was defined as the ratio of importance of food price score relative to nutrition. DQI(j,k) were assessed by a set of indicators and two indices including the Healthy Eating Index.Results: The associations between SES, PBFP, PBDQ and DQI(j,k) varied significantly across gender and ethnic groups. PBFP acted as a mediator in the association between SES and selected DQI(j) indicators, namely energy, fat intake, sodium and simple sugar consumption ( mediation proportion > 10%), but not PBDQ.Conclusions: SES, PBFP and PBDQ all affect dietary intake, and vary by ethnicity and gender. Positive effect of SES on DQIj, k may be mediated by PBFP but not PBDQ which is an independent protective factor. Nutrition education is important to promote healthy eating.