Table 1.

Intra observer Kappa correlations for Watson & Ballet and Vender staging systems

Observer	Classification
	Watson & Ballet	Vender et al.
EM1	0.437	0.241
EM2	0.394	0.394
R2M	0634	0.596
ORT	0.156	0.451
R2O	0.185	0.168
Mean	0.361	0.370

EM1 = Hand surgeon 1; EM2 = Hand surgeon 2; R2M = a last-year hand surgery resident, ORT = orthopedic surgeon; R20 = second-year orthopedic resident