Quality and reliability of prostate cancer-Videos on TikTok and Bilibili: Cross-sectional content analysis study.

[OBJECTIVES] Our research aims to assess the quality and reliability of videos related to prostate cancer on TikTok and Bilibili, and to compare content characteristics and information accuracy between the two platforms.

[METHODS] On May 1, 2025, we searched for the top 100 videos using the terms "prostate cancer" on TikTok and "" on Bilibili, resulting in 200 videos. Two independent reviewers evaluated the content of each video using the Global Quality Scale (GQS) score and modified DISCERN (mDISCERN). Both reviewers independently assessed each video's scope, reliability, and overall quality.

[RESULTS] Significant differences were observed in GQS and mDISCERN scores between TikTok and Bilibili videos ( < 0.0001 for both). Videos on Bilibili demonstrated superior quality and reliability compared to those on TikTok, as indicated by median GQS scores of 4.00 versus 2.00 and mDISCERN scores of 4.00 versus 2.00, respectively. Videos uploaded by urologists were significantly more reliable and of higher quality than those uploaded by patients ( < 0.001). Similarly, videos focused on disease knowledge and treatment were of higher quality and reliability than those sharing personal experiences ( < 0.01).

[CONCLUSION] Prostate cancer-related videos on Bilibili are generally of higher quality and reliability than those on TikTok. However, videos produced by urologists consistently demonstrated higher quality and reliability compared to those by patients across both platforms. Social media platforms should enhance the review and regulation of medical content to ensure its authenticity and accuracy, while content creators should aim to improve video quality to better meet the needs of a wider audience.