Table 1.

Demographic and neuropsychometric data for patients with PD and bilateral STN-DBS. Pre-morbid full scale IQ (PMFSIQ) was estimated with the Wechsler Test of Adult Reading (WTAR), which has been demonstrated to give comparable results in PD and healthy controls (Dalrymple-Alford et al., 2011). MMSE=Mini mental state examination. ACE-R=Addenbrooke׳s cognitive examination, revised edition. The fluency component has been excluded from the ACE-R, resulting in a maximum score of 86, because of the significant slowing of speech in patients with PD and STN-DBS.

Subject number	Age	Sex	Years since PD diagnosis	Years since STN-DBS implanted	Estimated PMFSIQ	MMSE (max 30)	ACE-R minus fluency (max 86)
1	55	M	10	7	92	30	81
2	55	M	11	4	113	30	82
3	51	M	9	2	106	29	80
4	56	M	10	3	120	30	86
5	50	F	5	2	104	30	78
6	75	F	8	5	108	30	77
7	64	M	16	7	123	29	82
8	57	M	15	5	108	30	86
9	57	M	29	2	96	29	77
10	64	M	11	3	97	30	76
11	72	F	21	2	90	30	79
12	65	M	15	4	103	29	79
13	61	F	23	4	106	30	82
Median	57		11	4	106	30	80