TABLE 1.

Cross‐mapping of items from UPDRS to MDS‐UPDRS

Item	Cross‐mapping from UPDRS → MDS‐UPDRS
Postural Stability	1 → 1 or 2; 2 → 3; 3 → 4
Finger Tapping right/left, Hands Movement right/left, Pronation Supination right/left, Leg Agility right/left	1 → 1 or 2; 2 → 2 or 3
Posture	2 → 2 or 3; 3 → 4
Speech, Gait	3 → 3 or 4
Rigidity neck, Rigidity right/left upper extremity, Rigidity right/left lower extremity	3 → 2; 4 → 3 4 rating on the MDS‐UPDRS is not captured by the original UPDRS

The description of impairment associated with the anchors and scores of the 17 items and its equivalence across the two versions of the scale can be accessed in the Supplemental S2.