Abstract：
As one of the major constituents of the cannabis sativa plant, cannabidiol (CBD) is approved for use in medical treatment and cosmetics because of its potential health benefits. With the rapid growth of the CBD market, customers purchase these products, and relevant discussions are becoming more active on social media.
In this study, we aimed to understand the users\' attitudes toward CBD products in various countries by conducting text mining on social media in countries with different substance management policies.
We collected posts from Reddit and Xiaohongshu, conducted topic mining using the latent Dirichlet allocation model, and analyzed the characteristics of topics on different social media. Subsequently, a co-occurrence network of high-frequency keywords was constructed to explore potential relationships among topics. Moreover, we conducted sentiment analysis on the posts\' comments and compared users\' attitudes toward CBD products on Reddit and Xiaohongshu using chi-square test.
CBD-related posts on social media have been rapidly increasing, especially on Xiaohongshu since 2019. A total of 1790 posts from Reddit and 1951 posts from Xiaohongshu were included in the final analysis. The posts on the 2 social media platforms, Reddit and Xiaohongshu, were categorized into 7 and 8 topics, respectively, by the latent Dirichlet allocation model, and these topics on the 2 social media were grouped into 5 themes. Our study showed that the themes on Reddit were mainly related to the therapeutic effects of CBD, whereas the themes on Xiaohongshu concentrated on cosmetics, such as facial masks. Theme 2 (CBD market information) and theme 3 (attitudes toward CBD) on Reddit had more connections with other themes in the co-occurrence network, and theme 3 and theme 1 (CBD therapeutic effects) had a high co-occurrence frequency (22,803/73,865, 30.87%). Meanwhile, theme 1 (CBD cosmetics) on Xiaohongshu had various connections with others (169,961/384,575, 44.19%), and the co-occurrence frequency of theme 4 (CBD ingredients) and theme 1 was relatively prominent (27,128/49,312, 55.01%). Overall, users\' comments tended to be positive for CBD-related information on both Reddit and Xiaohongshu, but the percentage was higher on Xiaohongshu (82.25% vs 86.18%; P<.001), especially in cosmetics and medical health care products.
The CBD market has grown rapidly, and the topics related to CBD on social media have become active. There are apparent differences in users\' attitudes toward CBD in countries with different substance management policies. Targeted CBD management measures should be formulated to suit the prevalence of CBD use of each country.
In this study, we aimed to understand the users\' attitudes toward CBD products in various countries by conducting text mining on social media in countries with different substance management policies.
We collected posts from Reddit and Xiaohongshu, conducted topic mining using the latent Dirichlet allocation model, and analyzed the characteristics of topics on different social media. Subsequently, a co-occurrence network of high-frequency keywords was constructed to explore potential relationships among topics. Moreover, we conducted sentiment analysis on the posts\' comments and compared users\' attitudes toward CBD products on Reddit and Xiaohongshu using chi-square test.
CBD-related posts on social media have been rapidly increasing, especially on Xiaohongshu since 2019. A total of 1790 posts from Reddit and 1951 posts from Xiaohongshu were included in the final analysis. The posts on the 2 social media platforms, Reddit and Xiaohongshu, were categorized into 7 and 8 topics, respectively, by the latent Dirichlet allocation model, and these topics on the 2 social media were grouped into 5 themes. Our study showed that the themes on Reddit were mainly related to the therapeutic effects of CBD, whereas the themes on Xiaohongshu concentrated on cosmetics, such as facial masks. Theme 2 (CBD market information) and theme 3 (attitudes toward CBD) on Reddit had more connections with other themes in the co-occurrence network, and theme 3 and theme 1 (CBD therapeutic effects) had a high co-occurrence frequency (22,803/73,865, 30.87%). Meanwhile, theme 1 (CBD cosmetics) on Xiaohongshu had various connections with others (169,961/384,575, 44.19%), and the co-occurrence frequency of theme 4 (CBD ingredients) and theme 1 was relatively prominent (27,128/49,312, 55.01%). Overall, users\' comments tended to be positive for CBD-related information on both Reddit and Xiaohongshu, but the percentage was higher on Xiaohongshu (82.25% vs 86.18%; P<.001), especially in cosmetics and medical health care products.
The CBD market has grown rapidly, and the topics related to CBD on social media have become active. There are apparent differences in users\' attitudes toward CBD in countries with different substance management policies. Targeted CBD management measures should be formulated to suit the prevalence of CBD use of each country.
摘要：
背景：作为大麻植物的主要成分之一，大麻二酚（CBD）因其潜在的健康益处而被批准用于医疗和化妆品。随着CBD市场的快速增长，客户购买这些产品，相关讨论在社交媒体上变得更加活跃。
目的：在本研究中，我们旨在通过在具有不同物质管理政策的国家/地区对社交媒体进行文本挖掘，了解用户对各个国家/地区CBD产品的态度。
方法：我们收集了Reddit和小红书的帖子，使用潜在的Dirichlet分配模型进行主题挖掘，并分析了不同社交媒体上话题的特点。随后，我们构建了一个高频关键词共现网络,以探索主题之间的潜在关系.此外，我们对帖子的评论进行了情感分析，并使用卡方检验比较了用户对Reddit和小红书上CBD产品的态度。
结果：社交媒体上与CBD相关的帖子迅速增加，尤其是2019年以来的小红书。最终分析了Reddit的1790个帖子和小红书的1951个帖子。2个社交媒体平台上的帖子，Reddit和小红书,分为7个和8个主题，分别,通过潜在的狄利克雷分配模型，2个社交媒体上的这些主题被分为5个主题。我们的研究表明，Reddit上的主题主要与CBD的治疗效果有关，而小红书的主题集中在化妆品上，比如面膜。Reddit上的主题2（CBD市场信息）和主题3（对CBD的态度）与共现网络中的其他主题有更多的联系，主题3和主题1（CBD治疗效果）的共现频率很高（22,803/73,865，30.87％）。同时,小红书的主题1（CBD化妆品）与他人有各种联系（169,961/384,575，44.19%），主题4（CBD成分）和主题1的共现频率相对突出（27,128/49,312，55.01%）。总的来说,用户的评论往往对Reddit和小红书的CBD相关信息都是积极的，但是小红书的百分比更高（82.25％vs86.18％；P<.001），尤其是在化妆品和医疗保健品中。
结论：CBD市场增长迅速，社交媒体上与CBD相关的话题也变得活跃起来。在物质管理政策不同的国家，用户对CBD的态度存在明显差异。应制定有针对性的CBD管理措施，以适应每个国家CBD使用的普遍性。
目的：在本研究中，我们旨在通过在具有不同物质管理政策的国家/地区对社交媒体进行文本挖掘，了解用户对各个国家/地区CBD产品的态度。
方法：我们收集了Reddit和小红书的帖子，使用潜在的Dirichlet分配模型进行主题挖掘，并分析了不同社交媒体上话题的特点。随后，我们构建了一个高频关键词共现网络,以探索主题之间的潜在关系.此外，我们对帖子的评论进行了情感分析，并使用卡方检验比较了用户对Reddit和小红书上CBD产品的态度。
结果：社交媒体上与CBD相关的帖子迅速增加，尤其是2019年以来的小红书。最终分析了Reddit的1790个帖子和小红书的1951个帖子。2个社交媒体平台上的帖子，Reddit和小红书,分为7个和8个主题，分别,通过潜在的狄利克雷分配模型，2个社交媒体上的这些主题被分为5个主题。我们的研究表明，Reddit上的主题主要与CBD的治疗效果有关，而小红书的主题集中在化妆品上，比如面膜。Reddit上的主题2（CBD市场信息）和主题3（对CBD的态度）与共现网络中的其他主题有更多的联系，主题3和主题1（CBD治疗效果）的共现频率很高（22,803/73,865，30.87％）。同时,小红书的主题1（CBD化妆品）与他人有各种联系（169,961/384,575，44.19%），主题4（CBD成分）和主题1的共现频率相对突出（27,128/49,312，55.01%）。总的来说,用户的评论往往对Reddit和小红书的CBD相关信息都是积极的，但是小红书的百分比更高（82.25％vs86.18％；P<.001），尤其是在化妆品和医疗保健品中。
结论：CBD市场增长迅速，社交媒体上与CBD相关的话题也变得活跃起来。在物质管理政策不同的国家，用户对CBD的态度存在明显差异。应制定有针对性的CBD管理措施，以适应每个国家CBD使用的普遍性。
