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Table 4 Comparison of cognitive assessment in patients with severe ICA stenosis and normal controls

From: Influence of collateral circulation on cerebral blood flow and frontal lobe cognitive function in patients with severe internal carotid artery stenosis

  AcoA group PcoA group OA group Controls H P value
Word Fluency Test 15.00 (13.00,18.50) 13.00 (10.00,15.75) 10.50 (9.00,16.00) 16.00 (14.00,18.50) 25.703 < 0.0001*
TMT(s)
 TMT-A 33.51 (28.61,40.23) 37.89 (28.68,41.58) 38.50 (32.22,43.54) 28.82 (25.00,34.63) 17.850 < 0.0001*
 TMT-B 68.11 (62.06,74.53) 68.26 (60.48,75.52) 73.50 (68.54,78.51) 60.21 (55.36,68.78) 28.739 < 0.0001*
Digit Span
 Digit Span forward 6.00 (5.00,7.00) 6.00 (4.25,7.00) 5.00 (4.25,6.75) 7.00 (6.00,8.50) 17.742 < 0.0001*
 Digit Span backward 3.00 (2.00,4.00) 3.00 (3.00,4.00) 3.50 (3.00,4.00) 5.00 (4.00,6.00) 74.082 < 0.0001*
  1. TMT, Trail-Making Test; H and P value, by non-parametric Kruscal-Wallis tests within the four groups
  2. *P < 0.001 indicate statistically significant differences