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Table 1 Demographic data of 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

Characteristics AcoA group PcoA group OA group Controls H or χ2 P value
Number 65 28 12 81   
Age (years) 68.00 (60.50,72.00) 67.50 (62.25,71.75) 62.00 (59.00,68.25) 69.00 (62.00,72.00) 6.684 0.083
Sex (M/F) 47/18 18/10 8/4 53/28 1.420 0.701
Education (years) 8.00 (5.00,12.00) 8.50 (5.00,12.00) 7.50 (3.75,10.75) 6.00 (3.50,10.00) 3.158 0.368
Hypertension 48 (73.8%) 19 (67.9%) 8 (66.7%) 48 (59.3%) 3.474 0.324
Diabetes mellitus 35 (53.8%) 12 (42.9%) 6 (50%) 30 (37.0%) 4.300 0.231
Hyperlipidemia 51 (78.5%) 20 (71.4%) 9 (75%) 49 (60.5%) 5.765 0.124
Smoking history 42 (64.6%) 19 (67.9%) 7 (58.3%) 50 (61.7%) 0.512 0.916
Alcoholism 10 (15.4%) 5 (17.9%) 2 (16.7%) 20 (24.7%) 2.151 0.542
  1. χ2 value, by Chi-squared test. H and P value, by non-parametric Kruscal-Wallis tests within the four groups