Fig. 4

Dysphagia Severity Rating Scale (DSRS) dysphagia assessments. A 12-point DSRS scale grading dysphagia severity based on fluid and diet modification, as well as supervision requirements for feeding (12 being the worst score: no oral fluids or feeding, even under supervision), was used at baseline, day 4, day 7, and day 22 following the final PES treatment session