Lansky D, Brownell K D
Am J Clin Nutr. 1982 Apr;35(4):727-32. doi: 10.1093/ajcn/35.4.727.
We report three studies that examine the accuracy and usefulness of food records among dieting obese patients. In study 1 errors in quantity and calorie estimates for 10 common foods averaged 63.9% (quantity) and 53.4% (calories). The results of study 2 indicate that only 53% of entries in daily food records were specified enough to permit objective estimates of the calories consumed. In study 3, blind raters could not predict weight loss based on subjects' self-recorded behavior changes. Collectively, these results question the utility of food records for estimating energy intake or predicting weight loss.
我们报告了三项研究，这些研究检验了节食肥胖患者食物记录的准确性和实用性。在研究1中，10种常见食物的数量和卡路里估计误差平均为63.9%（数量）和53.4%（卡路里）。研究2的结果表明，日常食物记录中只有53%的条目详细到足以客观估计所摄入的卡路里。在研究3中，盲评者无法根据受试者自我记录的行为变化来预测体重减轻情况。总体而言，这些结果对食物记录在估计能量摄入或预测体重减轻方面的效用提出了质疑。
