Tailored interventions to improve adherence to medication in elderly patients with Parkinson’s disease: a study protocol for a randomized controlled trial (AdhCare)

Table 4 Overview of the used questionnaires

Score	Cronbach’s alpha	Validity (correlation coefficient r)
GAI [22]	0.91	0.57–0.70^a
MDS-UPDRS [23]	0.79–0.93 across parts	0.76–0.96 across parts^a
MoCA [24]	0.83	0.61^a
PDQ-8 [25]	0.80	0.47–0.61^b
PHQ-9 [26]	0.89	0.55^b

ISSN: 1745-6215