Figure 3.

MDCs of intelligibility across severity levels based on a clinical stratification of dysarthria severity (large graph) and based on a quantile stratification of dysarthria severity (small graph). In both stratifications, the severe group has the highest MDC for intelligibility, and the normal group has the lowest MDC for intelligibility. Percent intelligibility for each group on the graph is as follows: profound = 0%–49%, severe = 50%–70%, moderate = 80%–89%, mild = 90%–95%, normal = 96%–100%, Group 1 = 0%–19%, Group 2 = 20%–39%, Group 3 = 40%–59%, Group 4 = 60%–79%, Group 5 = 80%–100%. MDC = minimally detectable change.