Mendes Larissa Loures, Campos Suellen Fabiane, Malta Deborah Carvalho, Bernal Regina Tomie Ivata, de Sá Naíza Nayla Bandeira, Velásquez-Meléndez Gustavo
Escola de Enfermagem, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
Rev Bras Epidemiol. 2011 Sep;14 Suppl 1:80-9. doi: 10.1590/s1415-790x2011000500009.
To evaluate the validity and reproducibility markers of food and beverage intake obtained by means of a telephone-based surveillance system.
Reproducibility was assessed by means of repeated interviews with a 7-15 day interval after the first interview of the system (n=258). Validity was analyzed based on three interviews corresponding to the 24 hour recall method, used as gold standard, 3 days a week, 7 to 15 days after the original telephone interview (n=217). In the study of reproducibility, kappa statistics was used to measure the similarity between the results of the proportions obtained in the first and second interviews. For validation, the proportion of positive reports regarding foods and beverages at the original telephone interview was compared to that obtained by the 24 hour recall method, and the results was analyzed by calculating sensitivity, specificity and positive predictive value.
In the reproducibility study, the agreement was almost perfect for the marker milk consumption (0.86), substantial for fruit consumption (0.67), intake of fruits and vegetables, intake of meat with fat and alcohol abuse. The agreement was moderate for the intake of soft drink, and fair for the consumption of vegetables. Regarding the validity, there was an underestimation of fruit, vegetable and milk consumption, except for meat and alcohol when compared with the consumption frequency estimated from the three 24-hours recalls, differences related to soft drink consumption was inexpressive.
The instruments enabled the surveillance of factors which were potentially associated with chronic diseases, however, it is a priority to continue with validation studies in other populations to provide greater system reliability, always considering possible limiting factors.
评估通过电话监测系统获取的食品和饮料摄入量指标的有效性和可重复性。
在系统首次访谈后7至15天进行重复访谈来评估可重复性（n = 258）。以24小时回顾法作为金标准，在原始电话访谈后7至15天，每周3天，进行三次访谈来分析有效性（n = 217）。在可重复性研究中，kappa统计量用于衡量第一次和第二次访谈中所得比例结果之间的相似性。为进行验证，将原始电话访谈中关于食品和饮料的阳性报告比例与24小时回顾法所得比例进行比较，并通过计算敏感性、特异性和阳性预测值来分析结果。
在可重复性研究中，牛奶消费指标的一致性几乎为完美（0.86），水果消费、水果和蔬菜摄入量、含脂肪肉类摄入量及酒精滥用的一致性为实质性。软饮料摄入量的一致性为中等，蔬菜消费的一致性为尚可。在有效性方面，与根据三次24小时回顾估计的消费频率相比，水果、蔬菜和牛奶的消费被低估，肉类和酒精除外，与软饮料消费相关的差异不显著。
这些工具能够监测与慢性病潜在相关的因素，然而，继续在其他人群中进行验证研究以提高系统可靠性是当务之急，同时始终要考虑可能的限制因素。
