Abstract The Dietary Guidelines for Americans (DGA) stress the importance of a diet high in vegetables; however, intake remains low. Recently, we found that self-identified low vegetable consumers ate the recommended daily amounts of vegetables when they were provided gratis but returned to habitual intake when vegetables were no longer supplied. This follow-up study aimed to identify key barriers and facilitators to vegetable consumption and to assess if barriers and facilitators differ between adults who had been provided vegetables in recommended amounts (N = 18) and those who had acted as controls with no vegetables provided (N = 16) during a randomized, controlled trial. Nominal group technique (NGT) sessions were conducted to identify and prioritize perceived barriers and facilitators to following the DGA for vegetables. Responses from all NGT sessions were aggregated and grouped into major themes. Convenience, availability, cost, and knowledge were core facilitators in both groups, while motivation emerged as a facilitator only in the control group. Time, preference, and cost were core barriers in both groups, while availability emerged as a barrier only in the control group and social support a barrier only in the intervention group. The barriers and facilitators identified by the intervention group and the control group from the primary study differed in relative rankings, suggesting that the experience of consuming provided vegetables influenced the strength of the perceived barriers and facilitators. The multi-factorial nature of the identified barriers and facilitators underscores the importance of addressing individual, social, and environmental factors to increase vegetable consumption.

中文翻译：

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遵循蔬菜摄入量膳食指南的障碍和促进因素：增加蔬菜摄入量干预措施的后续行动

摘要 美国人膳食指南 (DGA) 强调了富含蔬菜的饮食的重要性；然而，摄入量仍然很低。最近，我们发现自认为蔬菜摄入量低的消费者在免费提供蔬菜时食用了推荐的每日蔬菜量，但在不再提供蔬菜时又恢复了习惯摄入量。这项后续研究旨在确定蔬菜消费的主要障碍和促进因素，并评估以推荐量提供蔬菜的成年人（N = 18）和不提供蔬菜作为对照的成年人之间的障碍和促进因素是否不同（ N = 16) 在随机对照试验中。进行名义小组技术 (NGT) 会议以识别和优先考虑遵循蔬菜 DGA 的感知障碍和促进因素。来自所有 NGT 会议的回应被汇总并分组为主要主题。便利性、可用性、成本和知识是两组的核心促进因素，而动机仅在对照组中作为促进因素出现。时间、偏好和成本是两组的核心障碍，而可用性仅在对照组中成为障碍，而社会支持仅在干预组中成为障碍。初级研究中干预组和对照组确定的障碍和促进因素的相对排名不同，这表明食用提供的蔬菜的经历影响了感知障碍和促进因素的强度。已确定的障碍和促进因素的多因素性质强调了解决个人、社会、