Validity and Reproducibility of a Food Frequency Questionnaire among Chinese Women in Guangdong Province

中國廣東女性食物頻數問卷效度和信度的評價

Cai-Xia Zhang ； Suzanne C Ho

《Asia Pacific Journal of Clinical Nutrition》 18卷2期 (2009/06) Pp. 240-250

https://doi.org/10.6133/apjcn.2009.18.2.13

摘要

目的：爲研究中國廣東女性膳食因素與乳腺癌發病的關係，研製了食物頻數問卷。本研究的目的在于評價該食物頻數問卷（81個食物條目）的效度和信度。方法：61名年齡在24-64歲來自廣州市社區的女性參與本研究，采用三天的膳食記錄法作爲標準方法。調查對象一共完成兩次食物頻數問卷，間隔時間爲一年；在此期間，每隔兩個月完成一次連續三天的膳食記錄，共計六次。計算兩種膳食調查方法所得每日營養素和食物的攝入量以及相關係數。結果：對于營養素和大部分食物條目，第一次食物頻數問卷測得的平均攝入量高于第二次。兩次食物頻數問卷用熱量校正後的營養素相關係數範圍在0.46到0.71，食物的相關係數範圍在0.36到0.66。效度測試方面，熱量校正的營養素相關係數範圍在0.25到0.65之間，熱量校正的食物相關係數範圍為0.30到0.68。根據營養素攝入量，以四分位法將研究對象分組，在兩種膳食調查方法中被分到同一組的調查對象平均佔36%，有5%被分到極端的兩組。對食物來說，平均43%的調查對象被分到同一組，3%的對象被分到極端的兩組。Bland-Altman分析顯示食物頻數問卷和膳食記錄兩種方法測得的營養素攝入的差值和均數之間不存在綫性關係。結論：本研究結果顯示該食物頻數問卷具有滿意的信度和合理的效度，可用于評價中國廣東女性的營養素和食物的攝入。

關鍵字

食物頻數問卷 ； 信度 ； 效度 ； 女性 ； 中國

並列摘要

Objective: To evaluate the validity and reproducibility of a food frequency questionnaire (FFQ) developed for assessing the association between dietary factors and breast cancer risk among Chinese women in Guangdong. Methods: 61 women (24-64 years) were recruited from the community in Guangzhou city. An 81-item FFQ was administered twice, one year apart (FFQ1, FFQ2). In the mean time, six 3-day dietary records (DRs) were collected at two month intervals within the year. Daily consumption of nutrients and foods from the FFQs and DRs, correlation coefficients between the two FFQs and the FFQ with DRs were calculated. Results: Median intakes of nutrients and food group items are higher in FFQ1 than FFQ2. The energy-adjusted Pearson correlation coefficients between the FFQ1 and FFQ2 ranged from 0.46 to 0.71 for nutrients and 0.36 to 0.66 for food group items, respectively. In the validation study, energy-adjusted correlation coefficients were 0.25 to 0.65 for nutrients and 0.30 to 0.68 for food groups. Mean proportion of subjects being classified into the same quartile of nutrients and foods intake from the FFQ and DRs was 36% and 43%, respectively. Mean misclassification of subjects into opposite quartiles was 5% for nutrients and 3% for foods. Bland-Altman analysis showed that no linear trend existed between the differences and means for nutrients. Conclusions: The 81-item FFQ has satisfactory reproducibility and reasonable validity, and is useful in assessing the usual consumption of major nutrients and food groups among Chinese women in Guangdong.

並列關鍵字

food frequency questionnaire ； reproducibility ； validity ； women ； China