Table 1:
Clinical characteristics of the study population
| No. (%) (72 Total) | No. (%) (24 Tap-Positive) | P Value1a | P Value2b | No. (%) (25 Tap-Negative) | P Value3c | No. (%) (23 Controls) | |
|---|---|---|---|---|---|---|---|
| Male sex | 46 (64%) | 15 (62%) | 1.000 | .917 | 17 (68%) | .831 | 14 (61%) |
| Evans Index >0.3 | 42 (58%) | 19 (79%) | .005d | .252 | 15 (60%) | .145 | 8 (35%) |
| Callosal angle <90° | 46 (64%) | 21 (88%) | <.001d | .962 | 23 (92%) | <.001d | 2 (9%) |
| High-convexity tightness | 35 (49%) | 19 (79%) | <.001d | .154 | 14 (56%) | .002d | 2 (9%) |
| Enlarged Sylvian fissure | 33 (46%) | 19 (79%) | <.001d | .154 | 14 (56%) | <.001d | 0 |
| Alzheimer disease | 22 (31%) | 4 (17%) | .666 | .042d | 12 (48%) | .205 | 6 (26%) |
| Parkinsonism | 5 (7%) | 2 (8%) | .489 | 1.000 | 3 (12%) | .263 | 0 |
| Cerebrovascular diseases | 15 (21%) | 1 (4%) | .022d | .115 | 6 (24%) | .615 | 8 (35%) |
| Narrow spinal canal | 7 (10%) | 3 (13%) | .248 | 1.000 | 4 (16%) | .139 | 0 |
| Muscle atrophy of lower leg | 12 (17%) | 5 (21%) | .065 | .802 | 7 (28%) | .019d | 0 |
| Mean age (± SD) (yr) | 76.8 (±6.8) | 76.2 (±7.5) | .741 | .541 | 77.3 (±5.4) | .893 | 76.8 (±7.8) |
a
P value1: probability value for the χ2 test between the tap-positive group and controls.
b
P value2: probability value for the χ2 test between the tap-positive and tap-negative groups.
c
P value3: probability value for the χ2 test between tap-negative group and controls.
d
Significant.