Psychometric Evaluation of the Parkinson’s Disease Activities of Daily Living Scale

Table 3

Spearman correlations () between Parkinson’s disease Activities of Daily Living Scale (PADLS) scores and other variables.

Variable		value
Walking difficulties in daily life (Generic Walk-12)	0.66	<0.001
Perceived functional independence	−0.62	<0.001
Parkinson severity (self-rated)	0.59	<0.001
ADL dependency (ADL staircase)	0.54	<0.001
Depressive symptoms (Geriatric Depression Scale)	0.40	<0.001
Motor symptoms (UPDRS part III)	0.39	<0.001
Self-rated general health (RAND-36)	0.38	<0.001
Parkinson duration	0.33	<0.001
Complications of therapy (UPDRS part IV)	0.29	<0.001
Age	0.23	<0.001
Cognitive function (Montreal Cognitive Assessment)	−0.19	0.002
Frequency of social activities: visits family	−0.10	0.104
Frequency of social activities: visits friends	−0.06	0.332
Frequency of social activities: receives visits from family or friends	0.02	0.774

Higher scores are worse for all variables, except for perceived functional independence and cognitive function (higher = better) and frequency of social activities (higher = more social activities). This implies that more, for example, walking difficulties and less, for example, functional independence are associated with more ADL disability (positive and negative correlation coefficients, resp.); ADL = activities of daily living; UPDRS = Unified Parkinson’s Disease Rating Scale; n = 243–250, depending on missing data.