Modulation of Physical Activity to Optimize Pain Sensation following an Intra-Articular Corticosteroid Injection in Patients with Knee Osteoarthritis
Table 1
SF-36 scores (%) before and after injection: Means (SD).
SF-36 items
Before
2 weeks after
4 weeks after
6 weeks after
value
Effect size
Observed power
Physical function
56.2 (25.1)
60.7 (21.8)
65.0 (21.3)
64.3 (22.3)
0.14
0.14
0.46
Physical limitation
54.0 (17.8)
65.4 (19.0)
67.8 (13.9)†
68.8 (14.0)‡
<0.01
0.29
0.87
Bodily pain
46.2 (19.1)
64.2 (15.3)*
68.1 (15.2)†
66.0 (13.2)‡
<0.001
0.44
0.99
General health
68.8 (11.8)
70.4 (12.2)
69.2 (13.2)
66.6 (12.0)
0.52
0.06
0.20
Energy/fatigue
59.6 (8.2)
63.8 (6.2)
66.2 (7.7)†
66.5 (8.3)‡
0.01
0.26
0.82
Social function
73.1 (20.3)
85.6 (16.0)*
89.4 (15.2)†
88.5 (10.8)‡
<0.01
0.31
0.91
Emotional limitation
84.0 (16.1)
85.3 (18.1)
82.7 (12.5)
84.0 (14.2)
0.83
0.01
0.08
Emotional well-being
73.5 (6.4)
71.7 (7.7)
73.8 (7.4)
72.6 (6.9)
0.63
0.05
0.16
Significant difference between before and 2 weeks after injection. †Significant difference between before and 4 weeks after injection. ‡Significant difference between before and 6 weeks after injection.
