Table 1.

Interobserver and intraobserver ICC for analyzed parameters

Parameter	Interobserver ICC	Intraobserver ICC
Kellgen-Lawrence lateral (n = 91)	0.873	0.905
Hip-knee-ankle angle on hip-to-ankle radiographs (n = 20)	0.999	0.994
Correctability (n = 20)	0.924	0.911
Lateral joint space width on valgus stress radiographs (n = 20)	0.994	0.871
Medial joint space width on valgus stress radiographs (n = 20)	0.984	0.942

ICC = intraclass correlation coefficient; Kellgren-Lawrence lateral = grading according to the Kellgren-Lawrence grading scale for the lateral compartment performed on AP standing radiographs; correctability = mechanical leg alignment on valgus stress radiographs.