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. Author manuscript; available in PMC: 2018 Aug 1.
Published in final edited form as: Mov Disord. 2017 Jun 1;32(8):1244–1249. doi: 10.1002/mds.27058

Table 2.

Race/Ethnicity-Based Statistically Significant DIF

Race/Ethnicity-Based Non-Uniform DIF
Item MIMIC p-
values		 LORDIF p-
values		 R2 Magnitude
None NA NA NA NA
Race/Ethnicity-Based Uniform DIF
Item MIMIC p-
values 		LORDIF p-
values 		R2 Magnitude
Historical Disability - Eating Tasks
    Hispanic vs. all others <0.0005 <0.00005 0.0023 Negligible
Historical Disability Public/Social Settings
    Hispanic vs. all others <0.0005 0.0003 0.0015 Negligible
Historical Disability Exciting or Emotional Settings
    White vs. all others <0.0005 <0.00005 0.0047 Negligible
    Asian vs. all others <0.0005 <0.00005 0.0072 Negligible
Historical Disability Time with Off-Dystonia
    Asian vs. all others <0.0005 <0.00005 0.0023 Negligible
Historical Disability Effects of Off-Dystonia Separate from Pain
    Asian vs. all others <0.0005 <0.00005 0.0028 Negligible
Historical Disability Effects of Pain from Off-Dystonia
    White vs. all others <0.0005 <0.00005 0.0018 Negligible
    Asian vs. all others <0.0005 <0.00005 0.0099 Negligible
Historical Disability Dystonia Pain
    White vs. all others <0.0005 <0.00005 0.0027 Negligible
    Asian vs. all others <0.0005 <0.00005 0.0149 Negligible
Objective Impairment Face
    White vs. all others <0.0005 <0.00005 0.0078 Negligible
    Asian vs. all others <0.0005 <0.00005 0.0085 Negligible
Objective Impairment Right Arm/Shoulder
    Asian vs. all others <0.0005 <0.00005 0.0027 Negligible
Objective Impairment Left Arm/Shoulder
    Asian vs. all others <0.0005 <0.00005 0.0052 Negligible
Objective Impairment Right Leg/Hip
    White vs. all others <0.0005 <0.00005 0.0031 Negligible
    Asian vs. all others <0.0005 <0.00005 0.0119 Negligible
Objective Impairment Left Leg/Hip
    Asian vs. all others <0.0005 <0.00005 0.0091 Negligible
Objective Disability Drinking
    White vs. all others <0.0005 <0.00005 0.0044 Negligible
    Asian vs. all others <0.0005 <0.00005 0.0046 Negligible
Objective Disability Ambulation
    White vs. all others <0.0005 0.0001 0.002 Negligible
    Hispanic vs. all others <0.0005 <0.00005 0.0037 Negligible

Legend: Most of the UDysRS items did not meet the minimal statistical criteria for DIF (see text). The Table lists items with DIF identified by both lordif and MIMIC as independent approaches (p values shown) with McFadden’s R2 (R2) indicating the impact of the DIF.