钙和其它营养素摄入量用食物频率法评价。
Calcium and other nutrients intakes we re assessed by a food-frequency method.
在研究伊始和1年后采用半定量食物频率问卷调查法评估饮酒量。
With use of a semiquantitative food-frequency questionnaire, alcohol intake was evaluated at baseline and at 1 year.
方法用简化的食物频率询问法，对两地12 0 0 0多名40岁及以上农村老年人进行调查。
Methods Total 12 000 persons aged 40 year and over from these two cities were included. Simplified Food Frequency Questionnaire (SFFQ) was used.
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