Table 1: Characteristics of obese medial knee OA patients.

AllLess severeSevere
𝑁 = 1 3 6 𝑁 = 7 3 𝑁 = 6 3

Gender
 Females no. (%)112 (81%)63 (86%)49 (78%)
 Males no. (%)24 (19%)10 (14%)14 (22%)
Age (years)63.0 ± 6.562.3 ± 5.963.6 ± 7.0
(61.9 to 64.1)(61.0 to 63.8)(61.9 to 65.4)
Height (m)1.66 ± 0.081.65 ± 0.071.67 ± 0.10
(1.65 to 1.68)(1.64 to 1.67)(1.65 to 1.69)
Body mass (kg)101.7 ± 13.899.7 ± 12.6104.0 ± 14.8
(99.3 to 104.1)(96.5 to 102.5)(100.5 to 107.9)
BMI (kg/m2)36.8 ± 4.136.4 ± 3.937.3 ± 4.2
(36.1 to 37.5)(35.4 to 37.3)(36.3 to 38.4)
Self-selected walking speed (m/s)1.09 ± 0.191.11 ± 0.181.06 ± 0.20
(1.06 to 1.12)(1.07 to 1.15)(1.01;1.11)
Alignment (degrees, positive is varus)6.5 ± 4.74.3 ± 3.49.0 ± 4.7
(5.7 to 7.3)(3.5 to 5.1)(7.8 to 10.2)
Peak KAM (%BW*HT)3.17 ± 1.042.88 ± 0.953.51 ± 1.05
(3.00 to 3.35)(2.66 to 3.10)(3.25 to 3.77)
Peak isometric extensor torque (Nm/kg)1.14 ± 0.431.15 ± 0.461.12 ± 0.38
(1.07 to 1.21)(1.04 to 1.26)(1.03 to 1.22)
Peak isometric flexor torque (Nm/kg)0.54 ± 0.170.53 ± 0.160.54 ± 0.18
(0.51 to 0.56)(0.49 to 0.57)(0.50 to 0.59)
Pain (0–100 score, lower is worse)44.3 ± 20.042.7 ± 20.846.1 ± 19.1
(40.9 to 47.7)(37.8 to 47.5)(41.3 to 50.9)
Medial KL grade (scale 0–4)2.5 ± 1.01.7 ± 0.53.4 ± 0.5
(2.3 to 2.6)(1.6 to 1.8)(3.2 to 3.5)
Lateral KL grade (scale 0–4)1.5 ± 0.71.0 ± 0.61.9 ± 0.4
(1.3 to 1.6)(0.9 to 1.2)(1.8 to 2.0)
Patella femoral KL grade (scale 0–4)2.0 ± 0.91.7 ± 0.92.4 ± 0.8
(1.9 to 2.2)(1.5 to 1.9)(2.2 to 2.6)

Results are given in mean ± SD (95% confidence interval) if not stated otherwise. KAM: external knee adduction moment, N m = n e w t o n × m e t e r , BW: body weight, HT: height, and KL: Kellgren and Lawrence.