Center for Behavioral Health Statistics and Quality, Substance Abuse and Mental Health Services Administration, 1 Choke Cherry Road, Rockville, Maryland 20857, USA.
U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA.
J Food Prot. 2014 Mar;77(3):352-8. doi: 10.4315/0362-028X.JFP-13-286.
Hand washing is a simple and effective but easily overlooked way to reduce cross-contamination and the transmission of foodborne pathogens. In this study, we used the propensity score matching methodology to account for potential selection bias to explore our hypothesis that always washing hands before food preparation tasks is associated with a reduction in the probability of reported foodborne illness. Propensity score matching can simulate random assignment to a condition so that pretreatment observable differences between a treatment group and a control group are homogenous on all the covariates except the treatment variable. Using the U.S. Food and Drug Administration's 2010 Food Safety Survey, we estimated the effect of self-reported hand washing behavior on the probability of self-reported foodborne illness. Our results indicate that reported washing of hands with soap always before food preparation leads to a reduction in the probability of reported foodborne illness.
洗手是一种简单而有效的方法，但容易被忽视，可以减少交叉污染和食源性病原体的传播。在这项研究中，我们使用倾向评分匹配方法来考虑潜在的选择偏差，以验证我们的假设，即在准备食物之前始终洗手与报告的食源性疾病的概率降低有关。倾向评分匹配可以模拟随机分配到一个条件，使得治疗组和对照组之间的预处理可观察差异在除治疗变量以外的所有协变量上是同质的。利用美国食品和药物管理局 2010 年的食品安全调查，我们估计了自我报告的洗手行为对报告的食源性疾病的概率的影响。研究结果表明，报告的在准备食物之前始终用肥皂洗手会降低报告的食源性疾病的概率。
