Table 2.

Radiographic parameters of the affected and contralateral side

	Stahl index		Carpal height [mm]		Ulnar variance [mm]		Radial inclination [degrees]
	Kienböck	Control	Kienböck	Control	Kienböck	Control	Kienböck	Control
Median	0.35	0.47	1.42	1.47	−2.2	−1.8	25	23
Min	0.20	0.40	1.29	1.37	−5.6	−2.5	20	20
Max	0.50	0.61	1.64	1.76	0	+ 3.0	29	33

Stahl index, carpal height and ulnar variance are significantly different between affected and contralateral side (n = 17, p = 0.001, p = 0.001, p = 0.012, Wilcoxon-test), radial inclination showed no difference (n = 17, p = 0.164, Wilcoxon-test)