Fit index values, normal and acceptable values.

This paper established the Turkish validity and reliability of the Reward-based Eating Drive Scale (RED-13). This methodological study was conducted between January and June 2022. The study population consisted of all patients admitted to the dietary polyclinic of a hospital. The sample consisted of 500 participants. Data were collected using a personal information form and the Reward-Based Eating Drive Scale (RED-13). The data were analyzed using numbers, percentages, arithmetic means, standard deviations, correlation tests, t-tests, exploratory and confirmatory factor analyses, and Cronbach’s α reliability coefficients. The scale consists of 13 items and three subscales, explaining 66.1% of the total variance. The confirmatory factor analysis shows that x²/sd= 2.47, indicating an acceptable model. The goodness of fit indices are also acceptable (GFI = 0.99, AGFI = 0.99, CFI= 1.00, RMSEA = 0.08, and SRMR = 0.05). The total scale has a Cronbach’s α of 0.91. The first and second halves have Cronbach’s α values of 0.86 and 0.83, respectively. The scale has a Spearman-Brown coefficient of 0.85 and a Guttman Split-Half coefficient of 0.83. The scale has good internal consistency (reliability). The results indicate that the Reward-Based Eating Drive Scale (RED-13) is valid and reliable for the Turkish population.Trial registrationThe study was registered on ClinicalTrials.gov (number: NCT05017506).本研究确立了基于奖赏进食驱动量表（Reward-based Eating Drive Scale, RED-13）土耳其语版本的效度与信度。本项方法学研究于2022年1月至6月间开展，研究对象为某医院饮食专科门诊收治的全部患者，最终纳入500名参与者。研究数据通过个人信息问卷及基于奖赏进食驱动量表（RED-13）采集完成。数据分析采用频数、百分比、算术均数、标准差、相关性检验、t检验、探索性因子分析、验证性因子分析以及克朗巴赫α信度系数（Cronbach’s α reliability coefficients）等方法。该量表共包含13个条目，分为3个分量表，可解释总方差的66.1%。验证性因子分析结果显示χ²/sd=2.47，表明模型拟合可接受；各项拟合优度指标同样处于可接受范围（拟合优度指数（Goodness of Fit Index, GFI）=0.99、调整拟合优度指数（Adjusted Goodness of Fit Index, AGFI）=0.99、比较拟合指数（Comparative Fit Index, CFI）=1.00、近似误差均方根（Root Mean Square Error of Approximation, RMSEA）=0.08、标准化残差均方根（Standardized Root Mean Square Residual, SRMR）=0.05）。总量表的克朗巴赫α系数为0.91；分半后的前半部分与后半部分克朗巴赫α系数分别为0.86与0.83。该量表的斯皮尔曼-布朗系数（Spearman-Brown coefficient）为0.85，古特曼分半系数（Guttman Split-Half coefficient）为0.83，具备良好的内部一致性（信度）。研究结果表明，基于奖赏进食驱动量表（RED-13）土耳其语版本适用于土耳其人群，具备良好的效度与信度。试验注册：本研究已于ClinicalTrials.gov平台注册（注册号：NCT05017506）。