Table 1.

Data on demographic and clinical characteristics.

N=20	Mean (SD)	Median	Range
Age	56.8 (7.2)	57	41-68
Education	7.5 (4.5)	5	3-17
Disease duration	11.5 (6)	11.5	1-26
MMSE	25.9 (29.4)	2.1	22-30
TPP	9.8 (3.7)	8.6	6.3-9.3
TSP	6.8 (0.7)	6.8	5.8-8.3

SD: standard seviation; TPP: time from pre to post-operative assessment; TSP: time from surgery to post-operative assessment.