Schmidt L E, Cox M S, Buzzard I M, Cleary P A
Department of Medicine, University of Minnesota Health Center, Minneapolis 55455.
J Am Diet Assoc. 1994 Dec;94(12):1392-7. doi: 10.1016/0002-8223(94)92541-0.
To evaluate the reproducibility of a modified Burke-type diet history within the context of a long-term, randomized, 29-center clinical diabetes study.
Diet histories were collected by trained interviewers at the end of years 1 and 2 after subjects were randomly assigned to the intensive treatment group or the conventional treatment group. Mean daily intakes of energy, protein, carbohydrate, total fat, saturated fatty acids, monounsaturated fatty acids, polyunsaturated fatty acids, cholesterol, and dietary fiber were calculated for each treatment group at each time period.
The study population consisted of 139 subjects in the intensive treatment group and 128 subjects in the conventional treatment group. Ages ranged from 13 to 39 years; groups included men and women. Distribution by age, sex, race, proportion of smokers, weight reported as percent ideal body weight, and duration of IDDM were similar in both groups.
Differences in nutrient intake between the conventional and intensive treatment groups at each time period were tested for significance using the Wilcoxon rank-sum test. The Wilcoxon paired differences test was used to assess changes between time periods within treatment groups. Linear agreement between repeated administrations of the diet history was evaluated using Pearson's correlation coefficient, and the extent of within-subject reproducibility was assessed by intraclass correlation.
No statistically significant differences in energy and nutrient intakes were observed between the two groups at either year 1 or year 2. Within each treatment group, energy and nutrient intake differences between times were not statistically significant. Correlation coefficients between years 1 and 2 ranged from .51 for dietary fiber to .72 for dietary cholesterol; within-subject reproducibility was slightly higher.
These results demonstrate long-term reproducibility for the meal-based diet history in the DCCT population.
在一项长期、随机、29中心的临床糖尿病研究背景下，评估改良伯克式饮食史的可重复性。
在受试者被随机分配至强化治疗组或传统治疗组后的第1年末和第2年末，由经过培训的访谈员收集饮食史。计算每个治疗组在每个时间段的能量、蛋白质、碳水化合物、总脂肪、饱和脂肪酸、单不饱和脂肪酸、多不饱和脂肪酸、胆固醇和膳食纤维的平均每日摄入量。
研究人群包括强化治疗组的139名受试者和传统治疗组的128名受试者。年龄范围为13至39岁；两组均包括男性和女性。两组在年龄、性别、种族、吸烟者比例、报告体重占理想体重的百分比以及胰岛素依赖型糖尿病病程方面的分布相似。
使用Wilcoxon秩和检验来检验每个时间段传统治疗组和强化治疗组之间营养摄入量的差异是否具有显著性。使用Wilcoxon配对差异检验来评估治疗组内不同时间段之间的变化。使用Pearson相关系数评估饮食史重复施测之间的线性一致性，并通过组内相关评估受试者内可重复性的程度。
在第1年和第2年，两组之间在能量和营养摄入量方面均未观察到统计学上的显著差异。在每个治疗组内，不同时间之间的能量和营养摄入量差异无统计学意义。第1年和第2年之间的相关系数范围从膳食纤维的0.51到膳食胆固醇的0.72；受试者内可重复性略高。
这些结果证明了糖尿病控制和并发症试验（DCCT）人群中基于膳食的饮食史具有长期可重复性。
