Table 2.

Kappa agreement index between the subgroups

Subgroup	Areas	Kappa (95% CI)	Degree of agreement	p value
AB	Z1R	0,495	Moderate	0.011
	Z1L	0,321	Reasonable	0.059
	Z2R	0,469	Moderate	0.006
	Z2L	0,611	Substantial	0.000
	Average agreement between zones: 0.474
AC	Z1R	0,647	Substantial	0.001
	Z1L	0,657	Substantial	0.001
	Z2R	0,525	Moderate	0.004
	Z2L	0,438	Moderate	0.002
	Average agreement between zones: 0.567
BC	Z1R	0,406	Moderate	0.064
	Z1L	0,792	Substantial	0.000
	Z2R	0,412	Moderate	0.047
	Z2L	0,365	Reasonable	0.027
	Average agreement between zones: 0.494

95% CI - 95% confidence interval