多重推算对营养摄入量估计的准确性有多大? 来自ASA24数据的洞察力
Nicolas Woods1,2,3, Jason Gilliland1,2,3,4,5,6,7,8, Louise W McEachern2,3,4
1School of Health Studies, Western University, London, ON N6A 3K7, Canada.
Nutrients
|August 14, 2025
概括
多重归算 (MI) 显示,从青少年的饮食回忆中估计个人营养摄入量的准确性不佳,即使缺少数据. 这种方法对于精确的营养估计是不可靠的,需要谨慎应用.
科学领域:
- 营养流行病学 营养流行病学
- 饮食评估方法 饮食评估方法
- 统计计计算技术 统计计计算技术
背景情况:
- 准确的饮食评估对于营养流行病学至关重要.
- 自动自主24小时饮食评估工具 (ASA24) 数据可能包含不可思议的饮食回忆 (IDR).
- 对于高可变性饮食数据的多重归算 (MI) 的有效性仍然不确定.
研究的目的:
- 为了评估多重归算 (MI) 在估计营养摄入量的准确性.
- 在不同缺失数据百分比下评估MI性能 (10%,20%,40%).
- 分析MI对青少年饮食数据的可靠性.
主要方法:
- 利用了743名青少年 (年龄在13-18岁) 的24小时饮食回忆.
- 模拟缺失数据的删除率为10%,20%和40%.
- 通过链式方程应用多重归算,并将归算值与实际营养摄入量进行比较.
主要成果:
- 斯皮尔曼的推算和实际营养摄入量之间的rho相关性很弱 (平均 ρ ≈ 0.24).
- 对于大多数营养素 (<25%),准确度在真实值的±10%以内是低的.
- 饮食质量得分略有改善,但准确性仍然有限 (<30%).
结论:
- 多重归算表明,在估计青少年个体营养摄入量方面表现不佳.
- 尽管可能保留样本特征,但MI可能无法用于准确的营养估计.
- 需要进一步的研究来提高数据质量,并探索更优质的归算方法.
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