Table 2.

Gender-based DIF

Gender-based U-DIF: Impact magnitude of identified significant DIF
	Item	R2	Magnitude
Part 1 N=5547	1.4 Anxious Feelings	0.0033	Negligible
	1.9 Pain	0.0019	Negligible
Part 2 N=5546	2.1 Speech	0.0104	Negligible
	2.2 Saliva/drooling	0.0151	Negligible
	2.7 Handwriting	0.0016	Negligible
	2.9 Turning in bed	0.0030	Negligible
	2.10 Tremors	0.0019	Negligible
	2.11 Getting Out of Bed	0.0033	Negligible
Part 3 N=5326	3.1 Speech	0.0153	Negligible
	3.2 Facial expression	0.0120	Negligible
	3.3a Rigidity neck	0.0059	Negligible
	3.3d Rigidity Right LE	0.0029	Negligible
	3.5a Hand movements R	0.0009	Negligible
	3.8a Leg Agility R	0.0032	Negligible
	3.8b Leg Agility L	0.0015	Negligible
	3.9 Arise From Chair	0.0039	Negligible
	3.10 Gait	0.0016	Negligible
	3.12 Postural Stability	0.0079	Negligible
Part 4 N=5562	4.1 Time with Dyskinesias	0.0026	Negligible
	4.2 Functional impact of Dyskinesias	0.0047	Negligible

Legend: For gender, there was no NU-DIF identified. The Table lists items with U-DIF identified by both lordif and MIMIC as independent approaches (see Supplemental Material). McFadden's R² values and Magnitude of impact are shown in the columns.⁷