Characteristics of the KOA patients (n = 42).

The knee osteoarthritis (KOA) patients were divided in two groups according to: (i) KL grade: Less severe (KL 1 and 2) and severe (KL >2). Mean ± SEM (Range) for body mass index (BMI), KOOS (Knee injury and Osteoarthritis Outcome Score) scores for pain, quality of life, symptoms and daily living, and pain intensity immediately before the balance measurements and Kellgren and Lawrence (KL) score are presented. Significant group differences are indicated by “*” (t-test) and “#” (Mann-Whitney U-Test).a This parameter is different as it is used to separate the groups.