YouTube as a source of patient information for stroke: A content-quality and an audience engagement analysis.

Background: Stroke is the second leading cause of death worldwide following ischemic heart disease, and the fifth in the United States. The video-sharing database, YouTube, is the second most popular visited website with more than 2 billion users, thus it's increasingly being used as a medium for delivering health information.

Aim: We aimed to evaluate the quality, reliability and audience engagement of stroke-related YouTube videos.