Table 1

Results of neuropsychological testing in surgical and non-surgical groups

Surgical groupNon-surgical group
Time 1Time 2Wilcoxon two-tailed testTime 1Time 2
*p<0.01. RAVLT: Rey auditory verbal learning task; WAIS-R, Wechsler adult intelligence scale-revised; WMS-R, Wechsler memory scale-revised
RAVLT total learning40.2 (10.1)39.7 (9.3)0.381542.9 (6.5)45.7 (3.7)
RAVLT delayed recall6.6 (3.4)6 (3.9)0.08287.9 (2.5)8.3 (2.5)
RAVLT new recognition0.86 (0.09)0.86 (0.13)0.85850.92 (0.1)0.91 (0.1)
Benton visual retention test multiple choice9.3 (2.6)9.1 (2.9)0.662311.1 (2.4)12.3 (1.8)
Animals16.8 (4.2)15.5 (5.1)0.205217.3 (5.5)16.6 (2.9)
Controlled oral word association task40.4 (15)40 (14)0.575336.5 (7.6)35.7 (14.5)
Boston naming test 31 item20.9 (6.1)21.9 (5.4)0.020127.5 (2.4)29 (1.1)
WAIS-R block design20.1 (12.5)19.9 (11.7)0.813624.4 (8.3)27 (10.9)
WAIS-R digit span14.2 (3.9)15.1 (3.2)0.198217.1 (3.9)18.2 (2.3)
WMS-R mental control5.3 (1.1)5.4 (.8)0.70555.6 (0.7)5.8 (0.4)
Raven's coloured progressive matrices26.6 (5.5)26.9 (5.5)0.949632.4 (2.4)33.7 (0.82)
WAIS-R similarities16.4 (5.6)16.4 (4.7)0.679122.4 (2)22.5 (2.3)
Tower of London total moves trials 8–1236.1 (8.5)46 (14.3)0.0087*30.9 (3)34.5 (7.4)
Geriatric depression scale11.5 (6.2)9.4 (6.4)0.11888.9 (7.6)5 (3.9)