Table 2.

Kappa values of inter- and intraobserver variability.

VARIABILITY	T1	T2	GE	CT
Interobserver	0.462	0.057	0.889	0.922
Intraobserver 1	0.581	0.567	0.866	1
Intraobserver 2	0.608	N/A*	0.910	1

*No statistic computed since the second observation was a constant, all scans were scored as absent VP.

CT, computed tomography; GE, gradient echo.