Table 2 Global tortuosity index (GTI) and tortuosity index (TI) of individual intracranial arteries based on ICAS burden.

From: Global intracranial arterial tortuosity is associated with intracranial atherosclerotic burden

 

No ICAS (N = 274)

Low ICAS (N = 140)

High ICAS (N = 102)

P-value

GTI

 − 0.12 ± 0.93

 − 0.02 ± 0.97

0.33 ± 1.16

 < 0.001

GTIb

 − 0.18 ± 0.91

 − 0.04 ± 0.93

0.52 ± 1.15

 < 0.001

R ICA TI

 − 0.13 ± 0.95

0.08 ± 0.99

0.24 ± 1.08

0.004

L ICA TI

 − 0.13 ± 0.94

 − 0.01 ± 0.87

0.36 ± 1.23

 < 0.001

R bMCA TI

 − 0.18 ± 0.75

0.05 ± 1.22

0.43 ± 1.12

 < 0.001

L bMCA TI

 − 0.08 ± 0.31

0.12 ± 1.84

0.04 ± 0.28

0.153

R bACA TI

 − 0.06 ± 0.88

0.06 ± 1.22

0.09 ± 0.95

0.342

L bACA TI

0.01 ± 1.21

 − 0.02 ± 0.72

0.00 ± 0.65

0.968

R dMCA TI

0.03 ± 1.35

 − 0.06 ± 0.19

0.00 ± 0.27

0.683

L dMCA TI

 − 0.07 ± 0.89

0.06 ± 1.02

0.10 ± 1.24

0.219

R dACA TI

 − 0.05 ± 0.88

 − 0.03 ± 0.65

0.17 ± 1.56

0.176

L dACA TI

 − 0.02 ± 1.01

0.01 ± 0.91

0.05 ± 1.11

0.823

BA TI

 − 0.09 ± 0.44

 − 0.08 ± 0.40

0.38 ± 2.10

0.001

R VA TI

0.09 ± 1.25

 − 0.14 ± 0.41

 − 0.07 ± 0.66

0.164

L VA TI

 − 0.07 ± 0.38

0.05 ± 1.22

0.14 ± 1.70

0.224

R bPCA TI

 − 0.11 ± 1.08

 − 0.02 ± 0.76

0.34 ± 0.99

0.001

L bPCA TI

 − 0.06 ± 0.80

0.08 ± 1.33

0.05 ± 0.96

0.36

R dPCA TI

 − 0.04 ± 0.89

 − 0.03 ± 1.12

0.14 ± 1.11

0.454

L dPCA TI

0.00 ± 0.46

 − 0.13 ± 0.38

0.21 ± 2.22

0.147

R CbllA TI

 − 0.11 ± 0.93

 − 0.01 ± 0.91

0.33 ± 1.22

0.001

L CbllA TI

 − 0.06 ± 0.34

 − 0.03 ± 0.39

0.21 ± 2.14

0.071

  1. Values are mean ± standard deviation.
  2. ICAS intracranial atherosclerosis, GTI global tortuosity index, GTIb basal artery GTI, IQR interquartile range, ICA internal carotid artery, bMCA basal middle cerebral artery, dMCA distal middle cerebral artery, bACA basal anterior cerebral artery, dACA distal anterior cerebral artery, BA basilar artery, VA vertebral artery, bPCA basal posterior cerebral artery, dPCA distal posterior cerebral artery, CbllA cerebellar artery.