Correlation of the DISCERN score and video metrics, video source and video type:
For the 90 YouTube videos found, the mean views were 55292.4, mean likes 270.7, mean dislikes 21.5 and mean duration of video 11.9 minutes.
A Pearson’s product-moment correlation was run to assess the relationship between the total DISCERN score and video metrics (views, likes, dislikes and video length in minutes). A higher number of dislikes was correlated with a lower DISCERN score, r(98) = -0.24 [p = 0.02]. There was no statistically significant correlation found between the DISCERN score and the video views, likes or length.
A one-way Welch ANOVA was conducted to determine if DISCERN total score was different for groups with different video types or video sources (see Table 4). Mean DISCERN scores were not statistically significantly different between classified different video sources, however, Games-Howell post hoc analysis revealed that the mean increase in DISCERN scores from unclassified to academic sources (15.85, 95% CI [3.36, 28.34]) was statistically significant (p = -.006). A one-way Welch ANOVA showed there was no significant differences between the mean DISCERN scores amongst the different video types.
Correlation of the essential criteria scores and video metrics, sources and types :
A Spearman’s rank-order correlation was run to assess the relationship between the EIVC criteria score and video metrics (views, likes, dislikes and video length in minutes). A higher number of dislikes was correlated with a lower essential criteria score, rs(98) = -0.217, p =0.04. There was no correlation with the video views, likes or video length with the EIVC scores.
A one-way Welch ANOVA was conducted to determine if the EIVC scores were different amongst the video source and video type groups. There was no statistically significant differences between the EIVC scores amongst the groups of video sources however, it was found that patient education type videos were scored significantly higher than intra-operative type videos (p=0.003).