Wilson P, Horwath C
Department of Human Nutrition, University of Otago, Dunedin, New Zealand.
Eur J Clin Nutr. 1996 Apr;50(4):220-8.
To assess the ability of a short food frequency questionnaire to measure dietary calcium intake in women.
Estimates of calcium intake from the food frequency questionnaire were compared with those from seven-day estimated records in 58 Caucasian women aged 25-49 years in Dunedin, New Zealand.
Subjects were recruited through poster and newspaper advertising around the central business district of Dunedin, New Zealand. Of 69 subjects initially recruited, nine failed to complete diet records and two were excluded on the basis that their diet record was unlikely to represent habitual intake.
Mean dietary calcium intakes were 808.1mg/day from the estimated record and 776.9mg/day from the questionnaire. The mean difference in intake by the two methods (31.1mg, SD = 234.0, 95% CI = -30.4-92.7, p = 0.3) did not differ significantly from zero. The questionnaire classified women consuming less than 800mg calcium per day with 78% specificity. 81% of subjects when classified by the records fell into the same or adjacent quartiles when classified by the questionnaire. Only two subjects were grossly misclassified.
The short food frequency questionnaire could be used to assess mean dietary calcium intake in young to middle aged women. The specificity of the questionnaire is high in identifying women who consume < 800mg calcium/day, therefore it could be used to target interventions for those with intakes below this level.
评估一份简短食物频率问卷测量女性膳食钙摄入量的能力。
将食物频率问卷得出的钙摄入量估计值与新西兰达尼丁58名年龄在25 - 49岁的白种女性的7天估计记录得出的钙摄入量估计值进行比较。
通过在新西兰达尼丁中央商业区周围张贴海报和报纸广告招募对象。最初招募的69名对象中，9人未能完成饮食记录，2人因饮食记录不太可能代表习惯性摄入量而被排除。
通过估计记录得出的平均膳食钙摄入量为808.1毫克/天，通过问卷得出的为776.9毫克/天。两种方法摄入的平均差异（31.1毫克，标准差 = 234.0，95%可信区间 = -30.4 - 92.7，p = 0.3）与零无显著差异。该问卷将每日钙摄入量低于800毫克的女性分类的特异性为78%。按记录分类时，81%的对象按问卷分类时落在相同或相邻四分位数区间。只有两名对象被严重错误分类。
这份简短食物频率问卷可用于评估年轻至中年女性的平均膳食钙摄入量。该问卷在识别每日钙摄入量<800毫克的女性方面特异性较高，因此可用于针对摄入量低于此水平的人群进行干预。
