Reliable and valid assessment of sports nutrition knowledge can inform athlete nutrition education to address knowledge gaps. This study aimed to test the reliability and validity of an electronically administered sports nutrition knowledge tool – Platform to Evaluate Athlete Knowledge of Sports Nutrition Questionnaire (PEAKS-NQ). A 94-item PEAKS-NQ was piloted to 149 developmental athletes (DA) in New Zealand, with a subset invited to complete the PEAKS-NQ again to assess reliability. Reliability was evaluated using sign test, intraclass correlation and Cronbach’s α. Accredited sports dietitians (ASD; n 255) completed the PEAKS-NQ to establish construct validity via known-groups methodology and provided relevance scores to determine the scale content validity index (S-CVI). Rasch analysis was conducted to identify potentially problematic items and test reliability. Score differences between DA and ASD were analysed using independent t or non-parametric tests. DA (n 88) were 17·8 (sd 1·4) years, 61·4 % female and mostly in high school (94·3 %). ASD (n 45) were 37·8 (sd 7·6) years, 82·2 % female, with >5 years of dietetic experience (59·1 %). ASD scored higher than DA in all sections and overall (91·5 (sd 3·4) v. 67·1 (sd 10·5) %) (P < 0·001). There were no differences between retests (n 18; P = 0·14). Cronbach’s α was 0·86. S-CVI indicated good content validity (0·88). Rasch analysis resulted in a fifty-item PEAKS-NQ with high item (0·91) and person (0·92) reliability. The PEAKS-NQ is reliable and valid for assessing sports nutrition knowledge which could assist practitioners effectively tailor and evaluate nutrition education.

中文翻译：

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运动员运动营养知识评估平台问卷：可靠有效的运动员运动营养知识电子问卷

对运动营养知识进行可靠和有效的评估可以为运动员营养教育提供信息，以解决知识差距。本研究旨在测试电子管理的运动营养知识工具——运动员运动营养问卷知识评估平台（PEAKS-NQ）的信度和效度。一个 94 项的 PEAKS-NQ 被试用于新西兰的 149 名发育运动员 (DA)，其中一部分被邀请再次完成 PEAKS-NQ 以评估可靠性。使用符号检验、组内相关性和 Cronbach's 评估可靠性α. 认可的运动营养师（ASD；n255) 完成了 PEAKS-NQ 以通过已知组方法建立结构效度，并提供相关分数以确定量表内容效度指数 (S-CVI)。进行 Rasch 分析以识别潜在的问题项目和测试可靠性。使用独立分析 DA 和 ASD 之间的评分差异吨或非参数检验。达（n88) 分别为 17·8 (sd1·4) 岁，61·4 % 女性，大部分在高中 (94·3 %)。自闭症谱系障碍（n45) 分别为 37·8 (sd7·6) 岁，82·2 % 女性，具有 >5 年饮食经验 (59·1 %)。ASD 的所有部分和总体得分均高于 DA（91·5 (sd3·4)v. 67·1 (sd10·5) %) (磷< 0·001)。复试之间没有差异（n18;磷= 0·14)。克朗巴赫α为0·86。S-CVI 表示良好的内容效度（0·88）。Rasch 分析得出一个 50 项 PEAKS-NQ，具有高项 (0·91) 和个人 (0·92) 可靠性。PEAKS-NQ对于评估运动营养知识是可靠和有效的，可以帮助从业者有效地定制和评估营养教育。