Abnormal ground reaction forces lead to a general decline in gait speed in knee osteoarthritis patients

Table 1 Subject characteristics

Subject	Control	Knee OA
Sex M:F	7:13	8:16
Age (yr)	52.5 (8.8)	65.5 (7.2)1
BMI	23.2 (6.6)	31.2 (6.1)1
Leg length (cm)	89.3 (5.6)	85.1 (5.9)1
Height (cm)	168.5 (7.5)	164.1 (7.9)
Total KL score	NA	2.5 (1.1)

¹Significant difference between OA group vs control at PWS (P < 0.05). OA: Osteoarthritis; NA: Not available; PWS: Preferred walking speed; KL: Kellgren and Lawrence; BMI: Body mass index.