1639: CONTENT QUALITY AND SENTIMENT OF SUDDEN CARDIAC DEATH MATERIAL ON TIKTOK: A CROSS-SECTIONAL ANALYSIS

Introduction: TikTok is a significant source of health information, but the quality of content on topics like sudden cardiac death (SCD) is often unclear, leading to concerns about misinformation. This study hypothesized that videos from healthcare professionals (HCPs) would have higher quality and different sentiment compared to those from non-HCPs. Methods: Using the EXOLYT analytics platform, we identified top-performing SCD-related hashtags. The top 100 videos were collected, and after excluding irrelevant content, 83 videos were analyzed. For each video, we recorded engagement metrics (likes, comments, shares), creator status (HCP vs. non-HCP), and sentiment. The quality of health information was evaluated using the DISCERN Scale and a modified CRAAP test. Spearman correlations were used to explore relationships between quality, sentiment, and creator type. Results: HCP videos were significantly longer (median 65s vs. 39.5s, p=0.0102) and had more reshares (median 6 vs. 2, p=0.0050), though non-HCP content had a higher engagement rate (median 5.2% vs. 1.3%, p=0.0014). HCP videos demonstrated superior content quality, with significantly higher median DISCERN (41.5 vs. 26.75, p< 0.0001) and modified CRAAP scores (26 vs. 11, p< 0.0001). Longer videos correlated with higher quality scores (DISCERN: ρ=0.291, p=0.008; CRAAP: ρ=0.321, p=0.003) but also more negative sentiment (ρ=-0.346, p=0.001). Reshares also positively correlated with DISCERN (ρ=0.239, p=0.029) and CRAAP (ρ=0.418, p< 0.0001). No significant correlation was found between sentiment and quality scores or HCP status. Conclusions: TikTok content from healthcare professionals provides significantly higher quality health information regarding sudden cardiac death While longer videos from HCPs tend to be of higher quality and are shared more frequently, they may not achieve the same overall engagement rates as non-HCP content. Promoting HCP-generated content is crucial for improving the accuracy of critical health information on social media.