Faculty of Health, Medicine & Life Sciences, Maastricht University, the Netherlands.
School of Medicine & Public Health, Priority Research Centre for Physical Activity and Nutrition, Faculty of Health and Medicine, The University of Newcastle, Callaghan, New South Wales, Australia.
Am J Health Promot. 2020 Jan;34(1):59-62. doi: 10.1177/0890117119878074. Epub 2019 Oct 2.
To investigate the direct and indirect effects of sociodemographic/health factors on diet quality through practical nutrition knowledge (PNK) about how to compose a balanced meal.
A cross-sectional study using data from an online survey of the 10 000 Steps cohort (data collected November-December 2016).
Australia.
Adults (n = 8161). Response rate was 16.7%.
Self-reported lifestyle, health, and sociodemographic characteristics, including diet quality and PNK.
The PROCESS macro for SPSS was used to conduct the mediation analyses.
Better diet quality was associated with being female, older, more highly educated, and having a lower body mass index. Mediation analysis showed that PNK significantly mediated the associations between sex (ab = 0.54, 95% confidence interval [CI] = 0.39-0.70) and education (vocational education: ab = 0.22, 95% CI = 0.12-0.35, university: ab = 0.48, 95% CI = 0.35-0.64), and diet quality. Practical nutrition knowledge suppressed the association between age and diet quality (ab = -0.03, 95% CI = -0.04 to -0.03).
Variations in diet quality between sociodemographic groups were partially explained by differences in PNK, suggesting that focusing public health efforts on increasing this specific knowledge type might be promising.
通过有关如何构成均衡膳食的实用营养知识（PNK），调查社会人口学/健康因素对饮食质量的直接和间接影响。
使用来自 10000 步队列在线调查（2016 年 11 月至 12 月收集的数据）的数据进行的横断面研究。
澳大利亚。
成年人（n=8161）。回应率为 16.7%。
自我报告的生活方式、健康和社会人口学特征，包括饮食质量和 PNK。
使用 SPSS 的 PROCESS 宏进行中介分析。
更好的饮食质量与女性、年龄较大、受教育程度较高以及体重指数较低有关。中介分析表明，PNK 显著介导了性别（ab=0.54，95%置信区间[CI]：0.39-0.70）和教育（职业教育：ab=0.22，95%CI：0.12-0.35，大学：ab=0.48，95%CI：0.35-0.64）与饮食质量之间的关联。实用营养知识抑制了年龄与饮食质量之间的关联（ab=-0.03，95%CI：-0.04 至-0.03）。
社会人口统计学群体之间饮食质量的差异部分可以通过 PNK 的差异来解释，这表明将公共卫生工作重点放在增加这种特定知识类型上可能是有希望的。
