Table 3.

Assessments of TNM single stages and stage groups

TNM single stages	Kappa (95% CI)
IA	0.61
IB	0.54
IIA*	-*
IIB	0.38
IIIA	0.43
IIIB	0.60
IIIC	0.25
IV	0.88
x	0.05
Kappa combined	0.62 (0.52–0.71)
TNM stage groups	Kappa (95% CI)
Stage I + II	0.92
Stage III	0.75
Stage IV	0.88
Stage x	0.05
Kappa combined	0.82 (0.72–0.92)

*⁾ too few cases assessed to this stage