Table 1.

Characteristics of the different groups of participants.

	n	Age (years)		Sex distribution (%)		LQ	Education (years)
		Mean	SD	Female	Male
C	18	37	11.2	61	39	65	13.0
PRE	11	41	12.7	46	54	87	11.0
POST	23	43	10.7	57	43	87	11.1
PRE-POST	8	45	12.8	50	50	84	10.1
All patients	26	43	11.1	58	42	88	11.3

The characteristics are indicated after exclusion of one patient with atypical surgical procedure (#27). C, control group; LQ, laterality quotient (Edinburgh Handedness Inventory), PRE, pre-operatively tested patient group; PRE-POST, pre- and post-operatively tested patient group; POST, post-operatively tested patient group; SD, standard deviation.