Department of Health Studies, University of Waterloo, Waterloo, Ontario, Canada.
J Nutr Educ Behav. 2011 Sep-Oct;43(5):356-65. doi: 10.1016/j.jneb.2011.02.008.
To examine longitudinal trends in use of nutrition information among Canadians.
Population-based telephone and Internet surveys.
Representative samples of Canadian adults recruited with random-digit dialing sampling in 2004 (n = 2,405) and 2006 (n = 2,014) and an online commercial panel in 2008 (n = 2,001).
Sociodemographic predictors of label use, use of nutrition information sources, and nutrient content information.
Linear and logistic regression models to examine predictors and changes over time.
Food product labels were the most common source of nutritional information in 2008 (67%), followed by the Internet (51%) and magazines/newspapers (43%). The Internet was the only source to significantly increase during the study period (odds ratio = 1.39; P < .001); however, the frequency of reading food product labels increased since 2004. Food selection based on trans fat increased significantly in 2006 (odds ratio = 1.43; P < .001) after mandatory labeling of trans fat on packaged foods. Taste and nutrition were consistently the primary factors guiding food choice.
Food product labels and the Internet are nutrition information sources with broad reach. More comprehensive labeling regulations were associated with increased use of labels and nutrient information over time.
研究加拿大人群中营养信息使用的纵向趋势。
基于人群的电话和互联网调查。
2004 年（n = 2405）和 2006 年（n = 2014）采用随机数字拨号抽样方法招募的加拿大成年人代表性样本，以及 2008 年在线商业小组（n = 2001）。
标签使用、营养信息来源使用和营养素含量信息的社会人口统计学预测因素。
线性和逻辑回归模型用于检查预测因素和随时间的变化。
2008 年食品标签是最常见的营养信息来源（67%），其次是互联网（51%）和杂志/报纸（43%）。在研究期间，互联网是唯一显著增加的来源（比值比=1.39；P <.001）；然而，自 2004 年以来，阅读食品标签的频率有所增加。强制性包装食品反式脂肪标签后，2006 年基于反式脂肪选择食物的比例显著增加（比值比=1.43；P <.001）。味道和营养一直是指导食物选择的主要因素。
食品标签和互联网是具有广泛受众的营养信息来源。更全面的标签法规与标签和营养信息使用的增加有关。
