Table 4

Preoperative and postoperative values of variables in the battery of neuropsychological tests and in the behavioural scales

PreoperativePostoperativep Value% Change
Median (IQR)nMedian (IQR)n
Neuropsychological tests
 Memory quotient88.50 (20.00)1284.50 (26.50)12NS−4
  Personal and current information5.50 (2.25)146.00 (1.25)14NS0
  Orientation5.00 (2.25)144.00 (1.25)14NS0
  Mental control3.50 (3.25)144.00 (3.75)14NS0
  Logical memory6.25 (3.88)145.00 (5.00)14NS−21.24
  Digit span forward5.00 (2.00)146.00 (2.00)14NS0
  Digit span backward3.00 (4.00)143.00 (4.00)14NS0
  Visual reproduction4.00 (5.00)143.50 (6.00)14NS0
  Associate learning7.00 (5.50)137.50 (2.13)14NS0
Trail making test A100.00 (112.00)13110.50 (97.75)12NS8.33
Trail making test B217.50 (68.50)6200.00 (82.50)5NS16.21
Word fluency12.00 (6.00)1310.50 (6.25)14NS−17.65
Mini mental state examination23.50 (7.75)1425.50 (8.25)14NS2.78
Behavioural scales
 NPH Score9.50 (3.25)1414.00 (2.25)14<0.0145
  NPH Gait evaluation3.00 (1.00)145.00 (0.00)14<0.0176.67
  NPH Cognitive functions3.00 (1.00)144.00 (1.00)14<0.0133.33
  NPH Sphincter disturbances3.00 (1.50)145.00 (0.50)14<0.0166.67
RDRS-229.00 (8.75)1425.50 (7.25)14<0.0516.41
Stein and Langfit3.00 (2.00)141.00 (1.00)14<0.01150
Daily life activities scale5.50 (4.50)148.50 (3.00)14<0.0525
Intensity of dementia (DSMIII-R)1.00 (1.00)141.00 (1.00)14NS0
Clinical dementia rating4.00 (4.38)143.00 (2.63)14NS12.50
Informant's test65.00 (13.50)1351.00 (18.00)13<0.0143.03
  • IQR=Interquartile range (the difference between the 25th and 75th percentile points); NPH=normal pressure hydrocephalus.