[75] The Sialorrhea Clinical Scale for PD (SCS-PD) is a specific self-administered instrument that evaluates subjective sialorrhea-related discomfort. [76] It is composed of seven items that ...

(Damrosch & Perry, 1989). Parents were asked to respond on a 4-point Likert scale, from 0 = never to 4 = most of the time. Content and concurrent validity for the DQ were established by Wikler et al.