Quality and reliability of cardiac rehabilitation-related short Chinese videos on Douyin and Bilibili
A cross-sectional content analysis
Bibliographic Data
Background Social media platforms have emerged as prominent channels for disseminating cardiovascular health information. However, the accuracy, completeness, and clinical reliability of cardiac rehabilitation (CR)-related content vary widely. Therefore, this study This study aims to identify upload sources, contents, and feature information of these videos on Bilibili and Douyin, and further evaluate the video quality. Methods A cross-sectional study was conducted on Bilibili and Douyin using the keywords “cardiac rehabilitation (心脏康复)” and “postoperative coronary heart disease (冠心病术后康复).” A total of 200 videos were included. Data on video characteristics were collected, including title, uploader identity, upload time, video duration, content type, engagement metrics (likes, comments, and shares), presentation format, and video quality scores. Video quality and reliability were assessed using the modified DISCERN (mDISCERN), the Journal of the American Medical Association (JAMA) benchmark criteria, and the Global Quality Scale (GQS). Results Douyin videos were shorter in duration and more recently uploaded, and received significantly more likes and comments than Bilibili videos ( P < 0.001). No significant differences were observed between platforms in terms of saves or shares. Engagement metrics differed significantly across uploader categories for likes and comments ( P < 0.001). Videos uploaded by hospital departments achieved the highest mDISCERN, JAMA, and GQS scores ( P < 0.01). Bilibili videos showed slightly higher JAMA scores than Douyin videos ( P = 0.04). Spearman correlation analysis indicated that content quantity was positively associated with both GQS and JAMA scores. Overall, associations between video quality scores and user engagement metrics were weak and inconsistent. GQS showed a weak positive correlation with shares, whereas mDISCERN was negatively correlated with comment counts. No significant association was observed between JAMA scores and engagement indicators. Conclusions Our study shows that the quality of short videos on health information related to CR is poor on Bilibili and Douyin. However, videos uploaded by institutional and healthcare professional accounts demonstrate better performance in terms of information reliability and content quality. Therefore, CR information obtained from short-video platforms should be interpreted with caution, and viewers are advised to critically evaluate content credibility before using such information to guide health-related decisions
Content analysis · Social media · Upload · Video quality · Health Literacy and Information Accessibility · Mental Health via Writing · Social Media in Health Education · Rehabilitation
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