Table 1

Clinical diagnosis on blinded video assessment for 38 cases for reviewer 1 and 2 versus FP-CIT result and the working clinical diagnosis

Case No	Blinded video diagnosis		FP-CIT result	Working clinical diagnosis
Case No	R1	R2	FP-CIT result	Working clinical diagnosis
1	DT	PD	Normal	DT
2	ET	DT	Normal	DT
3	PD	PD	Abnormal (grade 3 JP; grade 2 JB)	TDPD
4	DT	DT	Normal	DT
5	DT	PD	Abnormal (grade 1)	TDPD
6	DT	DT	Normal	DT
7	Monosymptomatic rest tremor	DT	Normal	ET
8	DT	DT	Normal	DT
9	PD	DT	Abnormal (grade 1)	TDPD
10	DT	DT	Normal	DT
11	DT	DT	Normal	ET
12	PD	PD	Abnormal (grade 2 JP; grade 1 JB)	TDPD
13	ET	PD	Normal	DT
14	Monosymptomatic rest tremor	PD	Abnormal (grade 2 JP; grade 1 JB)	TDPD
15	ET	DT	Normal	DT
16	ET	DT	Normal	DT
17	PD	DT	Normal	DT
18	Atypical Tremor	PD	Abnormal (grade 2)	TDPD
19	DT	DT	Normal	DT
20	DT	DT	Normal	ET
21	PD/ Atypical Tremor	PD	Abnormal (grade 2 JP; grade 3 JB)	TDPD
22	DT	DT	Normal	DT
23	PD	PD	Normal	ET
24	DT	PD	Abnormal (grade 2)	TDPD
25	DT	DT	Normal	DT
26	DT	PD	Normal	DT
27	DT	DT	Normal	DT
28	PD	PD	Abnormal (grade 3 JP; grade 2 JB)	TDPD
29	ET	DT	Normal	DT
30	PD	PD	Normal	DT
31	PD	PD	Abnormal (grade 2 JP; grade 1 JB)	TDPD
32	PD/atypical tremor	DT	Normal	ET
33	PD	PD	Abnormal (grade 2)	TDPD
34	Atypical tremor	DT	Abnormal (grade 1)	TDPD
35	ET	DT	Abnormal (grade 1 JP; grade 2 JB)	TDPD
36	PD	PD	Abnormal (grade 2)	TDPD
37	ET	PD	Abnormal (grade 2)	TDPD
38	ET	PD	Normal	DT

DT, dystonic tremor; ET, essential tremor; Grades 0–3 for ¹²³I-N-ω-fluoro-propyl- 2ß-carbomethoxy-3ß-(4-iodophenyl) nortropane ([¹²³I] FP-CIT).22; JP and JB refer to nuclear physicians across the two sites; PD, Parkinson's disease; R1, reviewer 1; R2, reviewer 2; TDPD, tremor dominant Parkinson's disease.