Landry M J, Ranjit N, Hoelscher D M, Asigbee F M, Vandyousefi S, Ghaddar R, Davis J N
The University of Texas at Austin, Department of Nutritional Sciences, Austin, TX.
The University of Texas Health Science Center at Houston School of Public Health in Austin, Michael and Susan Dell Center for Healthy Living, Austin, TX.
Curr Dev Nutr. 2019 Jul 4;3(8):nzz080. doi: 10.1093/cdn/nzz080. eCollection 2019 Aug.
The purpose of this study was to expand the School Physical Activity and Nutrition questionnaire to include a greater variety of vegetables and to evaluate the relative validity and reliability of these revised items.
This study utilized 2 convenience samples of third to fifth graders for an analysis: validity ( = 70) and reliability ( = 76). Validity was assessed by comparing questionnaire items with vegetable intake reported from a 24-hour dietary recall covering the same reference period. Reliability estimates were assessed via same-day test-retest.
Agreement correlations ranged from 0.35 to 0.71. Kappa statistics varied from 0.16 to 0.66. Percentage agreements ranged from 57% to 87%. Test-retest Spearman coefficients were greater than 0.50 for 6 items, weighted Kappa values were greater than 0.40 for all 7 items, and percentage agreement exceeded 75% for 5 items.
Results suggest that the questionnaire is a valid and reliable measure of the previous day's vegetable intake in third- to fifth-grade students. This trial was registered at ClinicalTrials.gov as NCT02668744.
本研究的目的是扩展学校体育活动与营养调查问卷，以纳入更多种类的蔬菜，并评估这些修订项目的相对效度和信度。
本研究利用两个三年级至五年级学生的便利样本进行分析：效度分析（n = 70）和信度分析（n = 76）。通过将调查问卷项目与同一参考期内24小时膳食回顾报告的蔬菜摄入量进行比较来评估效度。通过同一天的重测来评估信度估计值。
一致性相关性范围为0.35至0.71。kappa统计量从0.16到0.66不等。百分比一致性范围为57%至87%。6个项目的重测斯皮尔曼系数大于0.50，所有7个项目的加权kappa值大于0.40，5个项目的百分比一致性超过75%。
结果表明，该问卷是评估三至五年级学生前一天蔬菜摄入量的有效且可靠的工具。本试验已在ClinicalTrials.gov上注册，注册号为NCT02668744。
