French M R, Langdon C, Levy-Milne R
Food, Nutrition and Health, Faculty of Agricultural Sciences, University of British Columbia, Vancouver, BC.
Can J Diet Pract Res. 2001 Summer;62(2):82-6.
The aim of this study was to develop and validate a food frequency questionnaire (FFQ) to assess the folate intake of women of childbearing age (between 18 and 45 years). An FFQ containing 140 foods that have the potential to contribute significantly to folate intake was developed. The FFQ was pretested by comparing it with three-day food records completed by 20 women living in Vancouver, British Columbia. The 140-item FFQ overestimated mean daily folate intake (546 +/- 145 mg/day versus 385 +/- 151 mg/day with three-day food records); the two methods were not correlated (r = 0.359, p = 0.143). The FFQ was revised to better represent usual folate intake, and the 140 items were reduced to 81. The 81-item FFQ was validated with 17 women who completed the FFQ and a seven-day food record over four weeks. The mean daily folate intakes were 421 +/- 136 mg/day and 376 +/- 87 mg/day for the FFQ and the food records, respectively; the two methods were significantly correlated (r = 0.512, p = 0.036). This study resulted in a validated FFQ that can be used as an instrument to determine folate intakes in similar populations.
本研究的目的是开发并验证一份食物频率问卷（FFQ），以评估育龄妇女（18至45岁）的叶酸摄入量。开发了一份包含140种可能对叶酸摄入有显著贡献的食物的FFQ。通过将其与居住在不列颠哥伦比亚省温哥华的20名女性填写的三日食物记录进行比较，对该FFQ进行了预测试。这份140项的FFQ高估了每日平均叶酸摄入量（546±145微克/天，而三日食物记录为385±151微克/天）；两种方法不相关（r = 0.359，p = 0.143）。对FFQ进行了修订，以更好地反映通常的叶酸摄入量，140项减少到了81项。对17名女性进行了81项FFQ的验证，她们在四周内完成了FFQ和七日食物记录。FFQ和食物记录的每日平均叶酸摄入量分别为421±136微克/天和376±87微克/天；两种方法显著相关（r = 0.512，p = 0.036）。本研究得出了一份经过验证的FFQ，可作为一种工具来确定类似人群的叶酸摄入量。
