N/n	Number
UL	Upper Limb
PC	Principal Component
PCA	Principal Component Analysis
IRB	Institutional Review Board
MS	Multiple Sclerosis
h	Hours
acs	Activity Count
DASH	Disability of the Shoulder Arm and Hand Scale
MAL-AoU	Motor Activity Log–Amount of Use Scale
PROMIS	Patient-Reported Outcome Measurement Information System Upper Extremity Bank 2.0 via Computer Adaptive Test
ACS	Activity Card Sort
EuroQoL	European Quality of Life Scale—5 dimensions 3 Levels
CES-D	Center for Epidemiological Studies Depression Scale
NIH-NICHD	National Institutes of Health: Eunice Kennedy Shriver National Institute of Child Health and Human Development
WSS	Within-Cluster Sum of Squares
MANOVA	Multivariate Analysis of Variance
AIC	Akaike Information Criterion
IQR	Inter-Quartile Range
ADL	Activities of Daily Living
Mo	Months
SD	Standard Deviation
Yrs	Years
IADL	Instrumental Activities of Daily Living
ProximalULPain	Proximal Upper Limb Pain
DistalULFracture	Distal Upper Limb Fracture
Excl.	Excluding
UE	Upper Extremity