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Relative validity and reliability of a novel diet quality assessment tool for athletes: the Athlete Diet Index
British Journal of Nutrition ( IF 3.6 ) Pub Date : 2020-10-20 , DOI: 10.1017/s000711452000416x
Louise Capling 1, 2 , Janelle A Gifford 1, 3, 4 , Kathryn L Beck 5 , Victoria M Flood 1, 4, 6 , Fiona Halar 1 , Gary J Slater 7 , Helen T O'Connor 1, 4
Affiliation  

Diet quality indices are a practical, cost-effective method to evaluate dietary patterns, yet few have investigated diet quality in athletes. This study describes the relative validity and reliability of the recently developed Athlete Diet Index (ADI). Participants completed the electronic ADI on two occasions, 2 weeks apart, followed by a 4-d estimated food record (4-dFR). Relative validity was evaluated by directly comparing mean scores of the two administrations (mAdm) against scores derived from 4-dFR using Spearman’s rank correlation coefficient and Bland–Altman (B–A) plots. Construct validity was investigated by comparing mAdm scores and 4-dFR-derived nutrient intakes using Spearman’s coefficient and independent t test. Test–retest reliability was assessed using paired t test, intraclass correlation coefficients (ICC) and B–A plots. Sixty-eight elite athletes (18·8 (sd 4·2) years) from an Australian sporting institute completed the ADI on both occasions. Mean score was 84·1 (sd 15·2; range 42·5–114·0). The ADI had good reliability (ICC = 0·80, 95 % CI 0·69, 0·87; P < 0·001), and B–A plots (mean 1·9; level of agreement −17·8, 21·7) showed no indication of systematic bias (y = 4·57–0·03 × x) (95 % CI −0·2, 0·1; P = 0·70). Relative validity was evaluated in fifty athletes who completed all study phases. Comparison of mAdm scores with 4-dFR-derived scores was moderate (rs 0·69; P < 0·001) with no systematic bias between methods of measurement (y = 6·90–0·04 × x) (95 % CI −0·3, 0·2; P = 0·73). Higher scores were associated with higher absolute nutrient intake consistent with a healthy dietary pattern. The ADI is a reliable tool with moderate validity, demonstrating its potential for application to investigate the diet quality of athletes.

中文翻译:

一种新型运动员饮食质量评估工具的相对有效性和可靠性:运动员饮食指数

饮食质量指数是评估饮食模式的一种实用且具有成本效益的方法,但很少有人调查运动员的饮食质量。本研究描述了最近制定的运动员饮食指数 (ADI) 的相对有效性和可靠性。参与者两次完成电子 ADI,相隔 2 周,然后是 4 天估计食物记录 (4-dFR)。通过使用 Spearman 等级相关系数和 Bland-Altman (B-A) 图直接比较两次给药的平均分数 (mAdm) 与来自 4-dFR 的分数来评估相对有效性。通过使用 Spearman 系数和独立比较 mAdm 分数和 4-dFR 衍生的营养摄入量来研究构建有效性测试。重测信度使用配对评估检验、组内相关系数 (ICC) 和 B-A 图。68名精英运动员(18·8(sd4·2) 年) 从澳大利亚体育学院两次完成 ADI。平均得分为 84·1 (sd15·2;范围 42·5–114·0)。ADI 具有良好的信度(ICC = 0·80, 95 % CI 0·69, 0·87;< 0·001)和 B-A 图(平均值 1·9;一致性水平 -17·8、21·7)没有显示系统偏差的迹象(是的= 4·57–0·03 ×X) (95 % CI -0·2, 0·1;= 0·70)。在完成所有研究阶段的 50 名运动员中评估了相对有效性。mAdm 评分与 4-dFR 衍生评分的比较中等(rs0·69;< 0·001) 测量方法之间没有系统偏差 (是的= 6·90–0·04 ×X) (95 % CI -0·3, 0·2;= 0·73)。较高的分数与较高的绝对营养摄入量相关,这与健康的饮食模式一致。ADI 是一种具有中等有效性的可靠工具,显示了其在调查运动员饮食质量方面的应用潜力。
更新日期:2020-10-20
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