健康成年人的脂肪酸摄入量用食物频率问卷量化,与红细胞膜脂肪酸含量相比:一个验证研究
Erin D Clarke1,2, Mitch Duncan3,4, Lisa G Wood5
1School of Health Sciences, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, New South Wales, Australia.
概括
澳大利亚饮食调查 (Australian Eating Survey) 的食物频率调查问卷显示,对于评估澳大利亚成年人长期饮食摄入量的红细胞膜脂肪酸的适度一致. 这证实了它的使用,并考虑了极端摄入量和内源合成.
科学领域:
- 营养生物化学 营养生物化学
- 饮食评估验证 饮食评估验证
- 人类营养人类营养
背景情况:
- 红细胞膜脂肪酸提供了一个客观的衡量饮食摄入量.
- 自我报告的饮食评估,就像食物频率问卷 (FFQs),需要根据客观生物标志物进行验证.
- 了解FFQ的准确性对于营养流行病学和公共卫生至关重要.
研究的目的:
- 为了验证来自澳大利亚饮食调查FFQ的脂肪酸摄入量估计,与红细胞 (RBC) 膜脂肪酸概况相比.
- 评估健康澳大利亚成年人的自我报告的饮食脂肪酸摄入量与红细胞膜组成之间的一致性.
主要方法:
- 使用澳大利亚饮食调查FFQ收集的人口统计数据和自我报告的饮食脂肪酸摄入量.
- 通过气相色谱测量RBC膜脂肪酸组成.
- 分析了使用布兰德-阿尔特曼图表和一致性相关系数 (ρc) 的一致性,并对混因素进行了调整.
主要成果:
- 在总和脂肪,单不和脂肪和多不和脂肪 (包括特定的欧米茄-3和酸) 中,FFQ和红细胞膜脂肪酸之间发现了中等的一致性 (ρc = 0.200.60).
- 在调整后的模型中,总和脂肪保持了适度的关联 (ρc = 0.240.58).
- 欧米茄-3补充剂对大多数脂肪酸的作用减弱,而碳水化合物摄入的影响最小.
结论:
- 澳大利亚饮食调查FFQ为澳大利亚成年人长期饮食脂肪酸摄入量提供了适度有效的衡量标准.
- 可以使用FFQ作为习惯性脂肪酸消费的指标,但要小心极端摄入量.
- 需要进一步的研究来证实不同种群中的发现,并解释内源性脂肪酸合成.
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