School of Health Sciences, Faculty of Health and Medicine, University of Newcastle, Callaghan 2308, Australia.
Priority Research Centre in Physical Activity and Nutrition, University of Newcastle, Callaghan 2308, Australia.
Nutrients. 2017 Dec 23;10(1):11. doi: 10.3390/nu10010011.
The current study examines associations between the dietary intakes of nutrient-dense foods, measured using brief indices and skin coloration, measured using reflectance spectroscopy in young adults. This is a cross-sectional analysis of 148 young Australian males and females (55% female) aged 18 to 25 years. Dietary intake was assessed using a validated food frequency questionnaire, with responses used to calculate two dietary indices: (i) the Australian Recommended Food Score (ARFS); and (ii) the Fruit And Vegetable VAriety Score (FAVVA). Skin yellowness was measured at three body locations using reflectance spectroscopy. Associations were assessed using Spearman's correlation coefficients, regression analysis, and agreement using weighted kappa (K). Significant, moderate correlations were found between skin yellowness and diet index scores for the ARFS (ρ = 0.30, < 0.001) and FAVVA score (ρ = 0.39, < 0.001). These remained significant after adjustment for confounders (total fat intake, sex, skin lightness) and for agreement based on categorical rankings. Results suggest that measurement of skin coloration by reflectance spectroscopy can be used as an indicator of overall dietary quality and variety in young adults. Further exploration in diverse populations is required.
本研究探讨了在年轻成年人中，使用简短指数测量的营养密集型食物的饮食摄入量与使用反射光谱法测量的肤色之间的关联。这是一项对 148 名年龄在 18 至 25 岁的澳大利亚年轻男性和女性（55%为女性）的横断面分析。饮食摄入量通过经过验证的食物频率问卷进行评估，通过回答问卷来计算两个饮食指数：（i）澳大利亚推荐食物评分（ARFS）；（ii）水果和蔬菜种类评分（FAVVA）。使用反射光谱法在三个身体部位测量皮肤黄度。使用Spearman 相关系数、回归分析和加权 Kappa（K）一致性来评估关联。ARFS（ρ=0.30，<0.001）和 FAVVA 评分（ρ=0.39，<0.001）与皮肤黄度之间存在显著的中度相关性。在调整混杂因素（总脂肪摄入量、性别、皮肤亮度）和基于分类排名的一致性后，这些相关性仍然显著。结果表明，使用反射光谱法测量皮肤颜色可以作为年轻成年人整体饮食质量和多样性的指标。需要在不同人群中进一步探索。
