Centro de Ciências Biológicas e da Saúde, Programa de Pós-Graduação em Saúde Coletiva, Universidade Federal do Maranhão, São Luís, MA, Brasil.
Faculdade de Nutrição, Programa de Pós-Graduação em Nutrição e Alimentos, Universidade Federal de Pelotas, Pelotas, RS, Brasil.
Braz J Med Biol Res. 2020 Dec 21;54(1):e9991. doi: 10.1590/1414-431X20209991. eCollection 2020.
The present study was conducted to evaluate the validity of the Food Frequency Questionnaire (FFQ) used in the RPS Birth Cohort Consortium (Ribeirão Preto, Pelotas, and São Luís) to assess dietary intake of adolescents from São Luís, Maranhão. The research was developed with 152 adolescents aged 18 and 19 years. For the validation of the FFQ, the average of three 24-hour recalls (24HRs) was used as the reference method. The mean and standard deviation of energy and nutrient intake extracted from the surveys were estimated. The paired Student's t-test was used to verify the differences between the instruments. Pearson correlation coefficient, intraclass correlation coefficient (ICC), weighted Kappa, and the Bland-Altman plot were calculated in order to measure the agreement. The study adopted a level of significance <5%. Compared with the three 24HRs, the FFQ overestimated the consumption of most nutrients. Energy-adjusted and de-attenuated concordance Pearson correlation coefficients ranged from 0.06 to 0.43, and correlations were significant for iron, calcium, riboflavin, sodium, saturated fat, niacin, and vitamin C. The energy-adjusted and de-attenuated ICCs ranged from 0.01 to 0.31, and the weighted Kappa ranged from 0.01 to 0.46. The analyses of agreement were significant for vitamin C, fiber, calcium, riboflavin, niacin, sodium, lipids, and iron. In conclusion, the FFQ presented acceptable relative validity for lipids, saturated fatty acids, fiber, calcium, iron, riboflavin, niacin, vitamin C, and sodium. This instrument will be useful in studies about food consumption of adolescents in São Luís, Maranhão.
本研究旨在评估用于评估马萨诸塞州圣路易斯青少年饮食摄入量的 RPS 出生队列联盟（里贝朗普雷图、佩洛塔斯和圣路易斯）中使用的食物频率问卷 (FFQ) 的有效性。该研究涉及 152 名年龄在 18 岁和 19 岁的青少年。为了验证 FFQ 的有效性，使用了三种 24 小时回忆（24HR）的平均值作为参考方法。从调查中提取的能量和营养素摄入量的平均值和标准差进行了估计。使用配对学生 t 检验来验证仪器之间的差异。计算了 Pearson 相关系数、组内相关系数（ICC）、加权 Kappa 和 Bland-Altman 图，以衡量一致性。该研究采用了<5%的显著性水平。与三种 24HR 相比，FFQ 高估了大多数营养素的摄入量。经能量调整和去衰减后的一致性 Pearson 相关系数范围为 0.06 至 0.43，铁、钙、核黄素、钠、饱和脂肪、烟酸和维生素 C 的相关性具有统计学意义。经能量调整和去衰减后的 ICC 范围为 0.01 至 0.31，加权 Kappa 范围为 0.01 至 0.46。维生素 C、纤维、钙、核黄素、烟酸、钠、脂质和铁的一致性分析具有统计学意义。总之，FFQ 对脂质、饱和脂肪酸、纤维、钙、铁、核黄素、烟酸、维生素 C 和钠具有可接受的相对有效性。该工具将有助于研究马萨诸塞州圣路易斯青少年的食物消费。
