Table 1.

Inclusion and exclusion criteria.

	Inclusion	Exclusion
Population	Adults with idiopathic PD and cognitive impairment (of any severity), with or without their carers	PD data not distinguishable from other conditions. Atypical or symptomatic parkinsonism.
	Where studies included broader samples of Lewy body dementias (including DLB as well as PDD) or a spectrum of cognitive function (inclusive of PD with normal cognition), we required >70% of the sample to be those with PD and cognitive impairment
Intervention	Support or therapeutic interventions	Pharmacological interventions; invasive medical or surgical interventions (e.g., deep brain stimulation, transcranial stimulation)
		No intervention described
Comparator	Any	Nil
Outcome	Measures of QoL/HrQoL, function/ADLs and/or wellbeing	Absence of QoL/HrQoL, function/ADLs and/or wellbeing outcome measures