Table 2 Yale Global Tic Severity Rating Scale scores before, and the last score after, deep brain stimulation (including follow-up, ranging from 2 to 18 months)

Patient No	DCI score (%)	YGTSS motor tic	YGTSS phonic tic	YGTSS social impairment	Total score (%)	YGTSS motor tic post	YGTSS phonic tic post	YGTSS social impairment post	Total score post (%)	Time of observation (post DBS) (months)
1	87	18	24	50	92	9	13	30	52	17
2	99	20	19	40	79	6	7	10	23	17
3	77	23	24	50	97	6	13	20	39	16
4	58	17	16	30	63	3	4	10	17	15
5	65	15	22	40	77	7	16	30	53	13
6	74	18	15	30	63	3	3	10	16	12
7	98	21	18	50	89	4	6	10	20	11
8	68	24	24	40	88	6	11	10	27	11
9	84	21	20	50	91	5	7	10	22	9
10	81	18	18	30	66	0	7	10	17	7
11	50	17	22	40	79	4	8	10	22	6
12	100	15	14	30	59	3	0	0	3	6
13	79	20	23	40	83	10	16	20	46	6
14	51	21	24	50	95	17	17	30	64	3
15	56	23	16	40	79	5	0	0	5	3
16	65	25	17	50	92	10	3	0	13	3
17	88	23	20	30	73	6	3	20	29	3
18	99	20	20	50	90	10	16	20	46	3
Mean		19.944	19.778	41.111	80.833	6.333	8.333	13.889	28.556
SD		2.980	3.353	8.324	11.982	3.835	5.719	9.785	17.470
Pre- vs post	NA	6.42 E = 11	8.508 E = 11	5.287 E = 09	3.362 E = 11
t paired		p<0.001	p<0.001	p<0.001	p<0.001

DBS, deep brain stimulation; DCI, diagnostic confidence index; YGTSS, Yale Global Tic Severity Rating Scale.