Validation of a quantitative FFQ for a study of diet and risk of colorectal adenoma among Japanese Brazilians.
Validation of a quantitative FFQ for a study of diet and risk of colorectal adenoma among Japanese Brazilians.
复制标题
对日裔巴西人的饮食和结直肠腺瘤风险研究的定量 FFQ 进行验证。
DOI：
10.1017/s1368980012003692
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发表时间：
2013
影响因子：
3.2
通讯作者：
Sharma,Sangita
中科院分区：
文献类型：
--
作者：
Pakseresht,Mohammadreza;Miyajima,NelsonTomio;Shelton,Andrew;Iwasaki,Motoki;Tsugane,Shoichiro;LeMarchand,Loic;Sharma,Sangita
目的评估161项定量FFQ（QFFQ）在结直肠腺瘤病例对照研究中评估饮食危险因素的有效性。设计一项采用Pearson相关系数、交叉分类、加权κ统计和Bland-Altman绘图对QFFQ进行4 d食物日记的横断面验证研究。研究对象为97名健康的日本-巴西成年人（40-75岁）。一名参与者被排除在分析，由于不寻常的能量摄入report.ResultsMean每日营养摄入量从QFFQ高于从食物日记。QFFQ和4 d食物日记平均值之间营养素摄入量的平均Pearson相关系数为0.43，在校正由于食物日记测量值的剩余逐日变化引起的衰减相关性后，该相关系数增加至0.45。调整总能量并进一步调整年龄和性别降低了相关性;然而，77%的观察结果保持在相同或相邻的四分位数中，平均加权κ为0.22。对数转换数据的Bland-Altman图显示，能量、脂肪、蛋白质、总叶酸和维生素C的差异和平均值之间无线性趋势。与食物日记相比，QFFQ表现出一贯合理的性能，膳食纤维，总叶酸，视黄醇，核黄素和维生素C。ConclusionsThis调查支持的相对有效性QFFQ作为一种方法，用于评估长期的饮食摄入量。该仪器将是一个有用的工具，在分析饮食腺瘤协会的病例对照研究。
ObjectiveTo assess the validity of a 161-item quantitative FFQ (QFFQ) that was developed to evaluate dietary risk factors for a colorectal adenoma case–control study.DesignA cross-sectional validation study of the QFFQ against 4 d food diary using Pearson correlation coefficients, cross-classification, weighted κ statistics and Bland–Altman plotting.SettingTwo hospitals in São Paulo, Brazil.SubjectsNinety-seven healthy Japanese-Brazilian adults (40–75 years) were recruited. One participant was excluded from the analysis due to unusual energy intake report.ResultsMean daily nutrient intakes from the QFFQ were higher than from the food diary. The mean Pearson correlation coefficient for nutrient intakes between the QFFQ and the average of the 4 d food diary was 0·43, and increased to 0·45 after correcting correlations for attenuation due to residual day-to-day variation in the food diary measurements. Adjustment for total energy and further adjustment for age and gender decreased the correlation; however, 77 % of observations remained in the same or adjacent quartiles with a mean weighted κ of 0·22. Bland–Altman plots on loge-transformed data showed no linear trend between the differences and means for energy, fat, protein, total folate and vitamin C. Compared with the food diary, the QFFQ showed consistently reasonable performance for dietary fibre, total folate, retinol, riboflavin and vitamin C.ConclusionsThis investigation supports the relative validity of the QFFQ as a method for assessing long-term dietary intake. The instrument will be a useful tool in the analysis of diet–adenoma associations in the case–control study.