The Influence of Radiographic Severity on the Relationship between Muscle Strength and Joint Loading in Obese Knee Osteoarthritis Patients
Table 1
Characteristics of obese medial knee OA patients.
All
Less severe
Severe
Gender
βFemales no. (%)
112 (81%)
63 (86%)
49 (78%)
βMales no. (%)
24 (19%)
10 (14%)
14 (22%)
Age (years)
63.0βΒ±β6.5
62.3βΒ±β5.9
63.6βΒ±β7.0
(61.9 to 64.1)
(61.0 to 63.8)
(61.9 to 65.4)
Height (m)
1.66βΒ±β0.08
1.65βΒ±β0.07
1.67βΒ±β0.10
(1.65 to 1.68)
(1.64 to 1.67)
(1.65 to 1.69)
Body mass (kg)
101.7βΒ±β13.8
99.7βΒ±β12.6
104.0βΒ±β14.8
(99.3 to 104.1)
(96.5 to 102.5)
(100.5 to 107.9)
BMI (kg/m2)
36.8βΒ±β4.1
36.4βΒ±β3.9
37.3βΒ±β4.2
(36.1 to 37.5)
(35.4 to 37.3)
(36.3 to 38.4)
Self-selected walking speed (m/s)
1.09βΒ±β0.19
1.11βΒ±β0.18
1.06βΒ±β0.20
(1.06 to 1.12)
(1.07 to 1.15)
(1.01;1.11)
Alignment (degrees, positive is varus)
6.5βΒ±β4.7
4.3βΒ±β3.4
9.0βΒ±β4.7
(5.7 to 7.3)
(3.5 to 5.1)
(7.8 to 10.2)
Peak KAM (%BW*HT)
3.17βΒ±β1.04
2.88βΒ±β0.95
3.51βΒ±β1.05
(3.00 to 3.35)
(2.66 to 3.10)
(3.25 to 3.77)
Peak isometric extensor torque (Nm/kg)
1.14βΒ±β0.43
1.15βΒ±β0.46
1.12βΒ±β0.38
(1.07 to 1.21)
(1.04 to 1.26)
(1.03 to 1.22)
Peak isometric flexor torque (Nm/kg)
0.54βΒ±β0.17
0.53βΒ±β0.16
0.54βΒ±β0.18
(0.51 to 0.56)
(0.49 to 0.57)
(0.50 to 0.59)
Pain (0β100 score, lower is worse)
44.3βΒ±β20.0
42.7βΒ±β20.8
46.1βΒ±β19.1
(40.9 to 47.7)
(37.8 to 47.5)
(41.3 to 50.9)
Medial KL grade (scale 0β4)
2.5βΒ±β1.0
1.7βΒ±β0.5
3.4βΒ±β0.5
(2.3 to 2.6)
(1.6 to 1.8)
(3.2 to 3.5)
Lateral KL grade (scale 0β4)
1.5βΒ±β0.7
1.0βΒ±β0.6
1.9βΒ±β0.4
(1.3 to 1.6)
(0.9 to 1.2)
(1.8 to 2.0)
Patella femoral KL grade (scale 0β4)
2.0βΒ±β0.9
1.7βΒ±β0.9
2.4βΒ±β0.8
(1.9 to 2.2)
(1.5 to 1.9)
(2.2 to 2.6)
Results are given in meanβΒ±βSD (95% confidence interval) if not stated otherwise. KAM: external knee adduction moment, , BW: body weight, HT: height, and KL: Kellgren and Lawrence.