Table 5

Primary and exploratory outcome measures

Measure/authorPurposeTime point
a) Efficacy and exploratory outcome measures for the participant
 The Addenbrooke's Cognitive Examination III26 Assesses cognitive functionBaseline/post-test
 Everyday Cognition Questionnaire27 Measures everyday cognition in people with movement disordersBaseline/post-test
 Pill Questionnaire37 Measures functional capacityBaseline/post-test
 Lille Apathy Rating Scale38 A scale to detect and quantify apathyBaseline/post-test
 Relationship Satisfaction Scale39 Assesses level of satisfaction in a relationshipBaseline/post-test
 The Brief Resilience Scale40 Assesses the ability to recover from stressBaseline/post-test
 Interpersonal Reactivity Index41 Measures empathetic concernBaseline/post-test
 Hospital Anxiety and Depression Scale42 Assesses depression and anxietyBaseline/post-test
 Parkinson's Disease Questionnaire-3943 A Parkinson's disease-specific quality of life measureBaseline/post-test
 Dementia Cognitive Fluctuation Scale44 Assesses proxy-reported fluctuations in cognitionBaseline/post-test
 The Neuropsychiatric Inventory45 Assesses presence or absence of behavioural disturbancesBaseline/post-test
 EuroQoL 5D31 Used for calculation of quality-adjusted life-yearsBaseline/post-test
 Client Services Receipt Inventory30 Collects information about medications and services used before entering the trial and during the trialBaseline/post-test
b) Exploratory outcome measures for the companion
 Short Form-12 Health Survey46 Measures an individual's perception of their physical and mental healthBaseline/post-test
 Relationship Satisfaction Scale39 Assesses level of satisfaction in a relationshipBaseline/post-test
 Brief Resilience Scale40 Assesses the ability to recover from stressBaseline/post-test
 Hospital Anxiety and Depression Scale42 Assesses depression and anxietyBaseline/post-test
 Zarit Burden Interview47 Measures companion burden due to caregivingBaseline/post-test
 Dyadic Relationship Scale48 Measures positive and negative aspects of the dyadic relationshipBaseline/post-test
 Relatives’ Stress Scale49 Measures perceived stress associated with caregivingBaseline/post-test
 Family caregiving role50 Measures aspects of caregiving related to satisfaction, love and angerBaseline/post-test