Skip to main content

Table 3 Comparison of the morphometric parameters for the BA bifurcation among the patient groups

From: Morphometry of cerebral arterial bifurcations harbouring aneurysms: a case-control study

parameter

patients w/ MCA An

patients w/ BA An

control patients

p value

BA

BA bifs w/ An

BA

 

α angle (o)

107.37 ± 19.27

136.68 ± 22.98

107.02 ± 23.55

< 0.001

Φ1 angle (o)

54.60 ± 20.23

71.70 ± 18.95

55.73 ± 19.19

< 0.001

Φ2 angle (o)

60.51 ± 17.87

77.07 ± 24.00

58.23 ± 20.82

< 0.001

r0, mm

1.57 ± 0.22

1.76 ± 0.36

1.58 ± 0.25

< 0.05

r1, mm

1.17 ± 0.21

1.31 ± 0.25

1.12 ± 0.22

< 0.001

r2, mm

0.96 ± 0.24

1.01 ± 0.23

0.92 ± 0.27

NS

asymmetry ratio, r22r1− 2

0.69 ± 0.21

0.62 ± 0.20

0.70 ± 0.25

NS

area ratio, (r12+r22)r0−2

0.94 ± 0.22

0.91 ± 0.23

0.90 ± 0.20

NS

n, junction exponent

1.98 ± 0.74

1.90 ± 0.68

1.83 ± 0.62

NS

1 + ϕ2) - α angle (o)

− 57.9 ± 26.2

−87.2 ± 31.1

−50.4 ± 27.7

< 0.01

ϕ1 - Φ1 angle (o)

−30.2 ± 23.8

−49.2 ± 19.9

−30.5 ± 22.0

< 0.05

ϕ2 - Φ2 angle (o)

−33.2 ± 20.7

−48.4 ± 23.7

− 28.0 ± 19.5

NS

  1. Bifs, bifurcations; see Table 1 for other abbreviations
  2. Post hoc analysis
  3. α angle, BA bifs w/ An significantly higher than BA from patients w/ MCA An*and BA from the control group*
  4. Φ1 angle, BA bifs w/ An significantly higher than BA from patients w/ MCA An* and BA from the control group*
  5. Φ2 angle, BA bifs w/ An significantly higher than BA from patients w/ MCA An* and BA from the control group*
  6. r0, BA bifs w/ An significantly larger than BA from the control group***
  7. r1, BA bifs w/ An significantly larger than BA from patients w/ MCA An*** and BA from the control group*
  8. 1 + ϕ2) - α angle, BA bifs w/ An significantly lower than BA from patients w/ MCA An*** and BA from the control group**
  9. ϕ1 - Φ1 angle, BA bifs w/ An significantly lower than BA from patients w/ MCA An***
  10. * p < 0.001, ** p < 0.01, *** p < 0.05