TABLE 1.

Questionnaires administered at t0, t1, t2, and t3

Domain	Instrument
Anxiety (primary outcome)	Hamilton Anxiety Rating Scale 16
Anxiety (secondary outcomes)	Parkinson Anxiety Scale 17
	Liebowitz Social Anxiety Scale 18
	Mini International Neuropsychiatric Inventory section G and O 19
Global cognitive status	Montreal Cognitive Assessment 20
Depression	Hamilton Depression Rating Scale 21
Apathy	Lille Apathy Rating Scale 22
Sleep and nocturnal issues	Parkinsonʼs Disease Sleep Scale 2 23
Coping strategies	Brief Cope scale 24 Thought Control Questionnaire 25
Motor symptom severity	MDS‐UPDRS 26
PD disease stage	Hoehn & Yahr staging 27
Caregiver burden	Zarit burden interview 28
Health‐related quality of life	Parkinsonʼs disease Quality of Life Scale 29

Abbreviations: t0, baseline; t1, end of the intervention period; t2, 3 months after the intervention; t3, follow‐up assessment at 6 months; MDS‐UPDRS, Movement Disorder Society Unified Parkinsonʼs Disease Rating Scale; PD, Parkinson's disease.