Interobserver reliability of computed tomography angiography in the assessment of ruptured intracranial aneurysm and impact on patient management

Table 3 Inter-observer agreement of computed tomography angiography locations of aneurysm

Parent artery	Reader 1	Reader 2
ACOM	73	73
ACA	5	6
RT ICA	20	20
LT ICA	16	16
RT MCA	21	22
LT MCA	20	20
Basilar	8	9
LT PCA	1	1
RT Vertebral	1	1
LT SCA	0	1
K	95%CI	P value
0.97	0.87-1.0	< 0.001
Arterial segment	Reader 1	Reader 2
ACOM- Lt ACA complex	36	36
ACOM- Rt ACA complex	34	34
ACOM proper	3	3
A1	1	1
RT A2	1	1
LT A2	0	1
Azygous A2	2	2
A3	1	1
RT MCA bifurcation	14	14
LT MCA bifurcation	15	15
RT M1	4	4
LT M1	3	3
RT M2	3	3
LT M2	2	2
M4	0	1
RT PCOM	12	12
LT PCOM	9	9
RT ICA Terminus	4	4
LT ICA Terminus	2	2
RT Cavernous ICA	4	4
LT Cavernous ICA	5	5
Basilar tip	4	4
Mid Basilar	2	3
Basilar Perforators	2	2
Rt V4	1	1
LT SCA	0	1
Lt P1	1	1
K	95%CI	P value
0.97	0.87-1.0	< 0.001

ACA: Anterior cerebral artery; RT: Right; ICA: Internal carotid artery; LT: Left; MCA: Middle cerebral artery; PCA: Posterior cerebral artery; SCA: Superior cerebellar artery; PCOM: Posterior communicating artery.