Table 1.

Breakdown of the number of subjects included at each stage of the analysis.

		Controls	PD patients	All RBD patients	RBD with parallel DaT SPECT/CT imaging
(A)	Number of subjects imaged with SWI	32	27	46	42
(B)	Number of subjects excluding those with motion‐degraded SWI images (subjects included in automated DNH quantification)	30	25	42	38
(C)	Number of subjects with diagnostic imaging and consensus visual DNH ratings (subjects included in visual DNH outcome analysis)	26	25	40	36

Abbreviations: SWI, susceptibility‐weighted imaging; PD, Parkinson’s disease; RBD, rapid eye movement sleep behaviour disorder; DaT SPECT/CT, Dopamine transporter single‐photon emission computed tomography with computed tomography‐based attenuation correction; DNH, dorsal nigral hyperintensity.