Table 2.

Kappa statistic for inter-rater reliability assessment.

Anatomical landmarks	Manual method			Proposed method
	Kappa-a			Kappa-b
Study group	Study-1	Study-2	Study-3	Study-1	Study-2	Study-3
SEV	0.542	0.48	0.56	0.75	0.84	0.81
IEV	0.621	0.57	0.79	0.8	0.83	0.9
AV	0.59	0.58	0.49	0.91	0.88	0.85

Kappa-a Interrater variability between observer-1 and observer-2 on pain radiagraph.

Kappa-b Interrater variability between observer-1 and observer-2 on CSA and MA extracted radiograph.