Exercise-Induced Functional Changes in People with Parkinson’s Disease following External Cueing and Task-Based Intervention

Table 2

Outcome measure summary with MCID and MDC.

Measure	Domain (ICF)	Range	Direction/interpretation	MDC	MCID	Psychometric properties
ABC; [35]	Activity	0-100%	Higher = more confidence	+/- 11.12%; [38]	∅	Excellent test-retest (ICC = 0.79); [38]; Excellent internal consistency (Cronbach’s alpha = 0.92); [38]
Gait speed m/s; (Comfortable); [76]	Activity	Continuous variable	Higher/Faster = less impairment; < .7 m/s = predictive for falls; >1.1 m/s normal walking speed; [78]	+/- .18; [49]	+/- .05; [49]	Excellent test-retest (ICC = 0.9); [79]; Excellent internal consistency (Cronbach’s alpha = 0.9); [79]
10 MWT; (Comfortable)	Activity	Continuous variable	Higher/Faster = less impairment	+/- .18; [35]	∅	Excellent test-retest (ICC = 0.96); [35]
MDS-UPDRS III; Motor; [34]	Activity; Body Function; Participation	0-132	Lower number = less impairment	∅	-3.25 improve; +4.63 worsen; [77]	Excellent test-retest (ICC = 0.9); [80]; Excellent internal consistency; (Cronbach’s alpha = 0.93); [34]
MiniBEST; [36, 37]	Body Function	0-28	Higher number = less impairment	+/- 5.52; [37]	+/- 4; [81]	Excellent test-retest (ICC = 0.92); [37]; Excellent internal consistency (Cronbach’s alpha = 0.91); [37]
PDQ39-SI; [39, 43]	Participation	0-19.5	Lower number = better quality of life	∅	+/- 1.6; [82]	High test-retest (ICC = 0.68-0.95); [39, 40]; Excellent internal consistency (Cronbach’s alpha = 0.84-0.94); [42]

Abbreviations: ABC = Activity Specific Balance Confidence Scale; ICF = International Classification of Functioning, Disability, and Health; MCID = Minimal clinical important difference; MDC = Minimal detectable change; MiniBEST = miniBESTest; MWT = meter walk test; PDQ-SI = Parkinson’s Disease Quality of Life Summary Index; UPDRS III = Unified Parkinson’s Disease Rating Scale Part III Motor. Note: References are indicated in brackets [ ].