Figure 1.

Graphical representation of interobserver agreement on Sunnybrook Facial Grading System (SB) (sub)scores over time. Circles with interconnecting line represent the intraclass correlation coefficient (ICC) for interobserver agreement for the videos in each of the 7 wk. 95% confidence interval is only presented for SB composite score, since is it the most important scale. Circle with error bars (right) represents the interobserver agreement on the last 50 videos (point estimate ICC and 95% confidence interval, respectively) on the last 50 videos. A horizontal line was placed at ICC = 0.7, the pre‐set acceptable level of agreement