食物频率问卷法评估人群膳食营养素摄入量的相对效度研究

Relative validity of food frequency questionnaire for estimating dietary nutrients intake

目的以称重记录法结合24 h回顾法为参考方法,评估食物频率问卷法（FFQ）应用于调查人群膳食营养素和食物摄入量的相对效度。方法采用随机抽样的方法在上海市抽取闵行区和金山区居民作为调查对象。使用称重法结合24 h膳食回顾法与食物频率问卷法对调查对象进行膳食调查,并以称重法结合24 h膳食回顾法作为标准,采用t检验,Wilcoxon秩和检验及相关系数检验对食物频率问卷所得数据进行统计分析。结果 FFQ和24 h回顾调查2种方法食用的食物大类相同,获得的谷类、豆类及其制品、蔬菜、十字花科蔬菜、水果、肉禽水产类以及奶及奶制品的每日摄入量有相关性（相关系数0.248-1.000）。FFQ和24 h回顾调查2种方法获得的能量、蛋白质、脂肪、碳水化合物、胆固醇每日摄入量均呈显著正相关（相关系数0.209-0.340）,其中能量与脂肪无统计学差异;镁、钾、磷、锰、碘、钙与硒每日摄入量呈显著正相关（相关系数0.204-0.419）,其中镁、钾、磷、锰、碘元素无统计学差异;维生素B1、B2、C、烟酸每日摄入量均呈显著正相关（相关系数0.170-0.305）,其中维生素B1、B2无统计学差异。结论食物频率问卷可以评估碘元素、十字花科蔬菜、大豆异黄酮以及能量、脂肪、镁、钾、磷、锰、维生素B1和维生素B2摄入量。

Objective To assess the relative validity of food frequency questionnaire（ FFQ） for estimating dietary nutrients and food intakes. Methods Using random sampling methods to select 200 people from Minhang District and Jinshan District. Dietary intakes were estimated by weighed dietary records combining with 24 h dietary recalls（ as reference method） and food frequency questionnaire. Relative validity were examined by T-test,Wilcoxon rank test and correlation analysis. Results The foods groups were the same in FFQ and 24 h dietary recalls. Correlated with daily intake of grains,beans and products,vegetables,cruciferous vegetables,fruits,meat and poultry,aquatic product,milk and products in two methods（ Correlation coefficients： 0. 248- 1. 000）. The daily food of energy, protein, fat, carbohydrate, cholesterol had significantly positive correlation in FFQ and 24 h dietary recalls（ Correlation coefficients： 0. 209- 0. 340）. No statistical difference in energy and fat. The daily food of Mg,K,P,Mn,I,Ca,Se had significantly positive correlation in two methods（ Correlation coefficients： 0. 204-0. 419）. No statistical difference in Mg,K,P,Mn,I. The daily food of vitamin B1、B2、C、niacin had significantly positive correlation in two methods（ Correlation coefficients：0. 170- 0. 305）. No statistical difference in vitamin B1、B2. Conclusion Food frequency questionnaire can be used to evaluate dietary intakes of I,cruciferous vegetables,soy isoflavones,energy,fat,Mg,K,P,Mn,vitamin B1 and vitamin B2.