Farmer Nicole, Kazmi Narjis, Franklin Kristina, Yang Li, Powell-Wiley Tiffany M, Wallen Gwenyth R
Translational Biobehavioral and Health Promotion Branch, National Institutes of Health, Clinical Center, Bethesda, Maryland, United States of America.
Social Determinants of Obesity and Cardiovascular Risk Laboratory, National Heart, Lung and, Blood Institute, Bethesda, Maryland, United States of America.
PLoS One. 2025 Jun 24;20(6):e0326481. doi: 10.1371/journal.pone.0326481. eCollection 2025.
Among U.S. adults who self-identified as African-American, frequent household cooking is related to better dietary quality and adherence to U.S. dietary guidelines, as measured by the Healthy Eating Index. However, African-Americans often reside in commercially disinvested areas with limited access to major food retailers. This study examined whether food shopping behaviors-travel time to grocery store and frequency of major food shopping-affect the relationship between cooking frequency and diet quality, potentially influencing community nutrition education outcomes. Using data from 2,434 non-Hispanic Black adults (≥ 18 years) from the 2007-2010 NHANES cycles, we performed linear regression analysis with Complex Sample General Linear Models (CSGLM). The Healthy Eating Index 2010 measured daily and dinner dietary quality. Mediation analysis was conducted to evaluate if food shopping behaviors are involved in potential causal pathways. Results showed that major food shopping frequency, but not travel time to a grocery store, was significantly associated with daily diet quality and cooking frequency (p < 0.001). Mediation analysis revealed that food shopping frequency significantly mediated the relationship between cooking frequency and dinner quality (52.44% mediating effect). When stratified by food security status, shopping frequency was only a significant mediator of cooking frequency and diet quality for those with full or marginal food security (64.89% mediating effect). For food-insecure individuals, major food shopping did not mediate the cooking-diet quality relationship. These findings suggest that food shopping frequency is a critical factor when assessing the link between cooking frequency and diet quality, and may inform factors to optimize food shopping behaviors within community nutrition education programs among those experiencing food-insecurity in the U.S.
在自我认定为非裔美国人的美国成年人中，经常在家做饭与更好的饮食质量以及对美国饮食指南的遵循情况相关，这是通过健康饮食指数衡量得出的。然而，非裔美国人通常居住在商业投资不足的地区，前往主要食品零售商处购物的机会有限。本研究调查了食品购物行为——前往杂货店的出行时间和主要食品购物的频率——是否会影响烹饪频率与饮食质量之间的关系，进而可能影响社区营养教育成果。利用2007 - 2010年国家健康与营养检查调查（NHANES）周期中2434名非西班牙裔黑人成年人（≥18岁）的数据，我们使用复杂样本一般线性模型（CSGLM）进行了线性回归分析。2010年健康饮食指数衡量了每日和晚餐的饮食质量。进行了中介分析以评估食品购物行为是否参与潜在的因果路径。结果显示，主要食品购物频率而非前往杂货店的出行时间与每日饮食质量和烹饪频率显著相关（p < 0.001）。中介分析表明，食品购物频率显著介导了烹饪频率与晚餐质量之间的关系（中介效应为52.44%）。按食品安全状况分层时，购物频率仅对那些有充足或边缘食品安全的人而言是烹饪频率与饮食质量的显著中介因素（中介效应为64.89%）。对于粮食不安全的个体，主要食品购物并未介导烹饪与饮食质量之间的关系。这些发现表明，在评估烹饪频率与饮食质量之间的联系时，食品购物频率是一个关键因素，并且可能为优化美国社区营养教育项目中粮食不安全人群的食品购物行为提供参考依据。
