Table 3: Level of pain, disability, and stiffness according to the four radiographic stages.

KL Grade I
(mean ± SD)
KL Grade II
(mean ± SD)
KL Grade III
(mean ± SD)
KL Grade IV
(mean ± SD)

WOMAC-A 16,42 ± 2,5014,00 ± 3,4913,98 ± 3,34 16,86 ± 2,27>0.05
WOMAC-B6,92 ± 2,07 5,41 ± 1,945,19 ± 1,69 6,57 ± 1,13>0.05
WOMAC-C48,67 ± 7,0444,02 ± 9,6247,86 ± 8,5553,00 ± 9,25>0.05

KL: Kellgren-Lawrence scale.
WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index.