Table 3.

Comparison of English language and Hebrew exploratory factor structures for Parts I – IV of the MDS-UPDRS.

Factor	Item	Item factor loading
Part I: Non-Motor Aspects of Experiences of Daily Living
(Section CFI = 0.96, RSMEA = 0.06)
		English*	Hebrew
Factor 1	Percent variance	34.0	34.2
	Daytime sleepiness	0.53	0.44
	Sleep problems	0.35	xxxx
	Cognitive impairment	0.55	0.42
	Pain and other sensations	0.43	xxxx
	Hallucinations and psychosis	0.56	0.68
	Urinary problems	0.61	0.48
	Constipation problems	0.46	0.47
	Light headedness on standing	0.46	0.43
	Fatigue	0.47	0.41***
Factor 2	Percent variance	9.5	10.1
	Depressed mood	0.81	0.85
	Anxious mood	0.68	0.69
	Apathy	0.55	0.61
	Sleep problems	xxxx	0.42
	Pain and other sensations	xxxx	0.41
	Fatigue	xxxx	0.57***
Part II: Motor Aspects of Experiences of Daily Living
(Section CFI = 0.99, RSMEA = 0.07)
		English*	Hebrew
Factor 1	Percent variance	53.1	57.2
	Speech	0.79	0.89
	Saliva and drooling	0.45	0.48
	Chewing and swallowing	0.6	0.49
	Handwriting	0.46	0.52
	Doing hobbies and other activities	0.46	0.43***
	Eating tasks	xxxx	0.35***
Factor 2	Percent variance	8.7	9.8
	Eating tasks	0.68	0.19***
	Tremor	0.43	0.99
Factor 3	Percent variance	7.7	7.7
	Dressing	0.64	0.88
	Hygiene	0.65	0.86
	Turning in bed	0.65	0.75
	Getting out of bed	0.73	0.80
	Walking and balance	0.82	0.76
	Freezing	0.76	0.61
	Doing hobbies and other activities	xxxx	0.60***
	Eating tasks	xxxx	0.86***
Part III: Motor Examination
(Section CFI = 0.94, RSMEA = 0.07)
		English*	Hebrew
Factor 1	Percent variance	36.7	37.4
	Speech	0.6	0.47***
	Facial expression	0.54	0.40***
	Arising from chair	0.8	0.79
	Gait	0.87	0.85
	Freezing of gait	0.83	0.72
	Postural stability	0.8	0.80
	Posture	0.7	0.81
	Global spontaneity of movement	0.67	0.59
	Toe tapping, left foot	xxxx	0.53***
	Leg agility, right leg	xxxx	0.46***
	Leg agility, left leg	xxxx	0.57***
Factor 2	Percent variance	15.3	15.0
	Rest tremor amplitude, RUE	0.73	0.75
	Rest tremor amplitude, LUE	0.71	0.71
	Rest tremor amplitude, RLE	0.74	0.80
	Rest tremor amplitude, LLE	0.7	0.72
	Rest tremor amplitude, lip/jaw	0.6	0.65
	Constancy of rest tremor	0.88	0.83
	Postural tremor, right hand	xxxx	0.65***
	Postural tremor, left hand	xxxx	0.63***
Factor 3	Percent variance	6.6	7.5
	Rigidity, neck	0.68	0.66
	Rigidity, RUE	0.73	0.61***
	Rigidity, LUE	0.74	0.63
	Rigidity, RLE	0.8	0.65***
	Rigidity, LLE	0.82	0.68
Factor 4	Percent variance	6.2	5.6
	Finger tapping, right hand	0.67	0.73
	Hand movements, right hand	0.67	0.81
	Pronation/supination, right hand	0.7	0.73
	Rigidity, RUE	xxxx	0.46***
	Rigidity, RLE	xxxx	0.41***
	Toe tapping, right foot	xxxx	0.68
	Leg agility, right leg	xxxx	0.72***
	Rest tremor amplitude, RUE	xxxx	0.43
Factor 5	Percent variance	4.9	4.7
	Finger tapping, left hand	0.67	0.59
	Hand movements, left hand	0.7	0.69
	Pronation/supination movements, left hand	0.65	0.68
	Rigidity, LUE	xxxx	0.41
	Toe tapping, left foot	xxxx	0.57***
	Leg agility, left leg	xxxx	0.52***
Factor 6	Percent variance	4.5	4.5
	Postural tremor, right hand	0.66	0.45***
	Postural tremor, left hand	0.71	0.42***
	Kinetic tremor, right hand	0.81	0.66
	Kinetic tremor, left hand	0.81	0.56
Factor 7	Percent variance	3.3	3.4
	Toe tapping, right foot	0.65	xxxx
	Toe tapping, left foot	0.62	xxxx
	Leg agility, right leg	0.62	xxxx
	Leg agility, left leg	0.6	xxxx
	Speech	xxxx	0.62***
	Facial expression	xxxx	0.63***
Part IV: Motor Complications
(Section CFI = 1.00, RSMEA = 0.09)
		English*	Hebrew
Factor 1	Percent variance	63.9	71.5
	Time spent in the OFF state	0.87	0.89
	Functional impact of fluctuations	0.84	0.70***
	Complexity of motor fluctuations	0.82	0.65***
	Painful OFF state dystonia	0.5	0.57
	Percent variance	15.6	11.8
Factor 2	Time spent with dyskinesias	0.71	0.77
	Functional impact of dyskinesias	0.95	0.94
	Functional impact of fluctuations	xxxx	0.57***
	Complexity of motor fluctuations	xxxx	0.49***

^*Because we are using a different version of M-Plus, the factor loadings may vary slightly from published version.

^***Item load on more than one factor with factor loading ≥0.40.

xxxx implies the listed item did not.