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. 2015 Dec;36(12):2262–2269. doi: 10.3174/ajnr.A4440

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.