A treatment applying a biomechanical device to the feet of patients with knee osteoarthritis results in reduced pain and improved function: a prospective controlled study

Table 3 Mean values and time by treatment interaction results of secondary outcome measures*

Outcome	Baseline	Follow-up (4 weeks)	Final (8 weeks)	P Value†
SF-36 Physical Functioning subscale
Active	46.0 ± 18.6	61.8 ± 19.2	69.2 ± 21.0	P < 0.001
Control	43.7 ± 21.1	36.7 ± 20.9	38.7 ± 22.1
P Value	0.66	<0.001	<0.001
SF-36 Mental Health subscale
Active	57.5 ± 45.3	73.6 ± 38.2	90.8 ± 23.4	0.004
Control	56.0 ± 39.3	42.7 ± 40.3	44.0 ± 39.3
P value	0.90	0.006	<0.001
SF-36 Score Results
Active	56.0 ± 21.1	68.1 ± 17.7	77.1 ± 15.1	<0.001
Control	53.5 ± 18.9	51.1 ± 19.5	48.5 ± 22.1
P value	0.65	0.001	<0.001
Knee Society Score
Knee Score
Active	54.1 ± 17.9	67.0 ± 14.3	78.6 ± 11.6	<0.001
Control	60.3 ± 17.9	62.1 ± 17.8	50.8 ± 17.8
P value	0.44	0.25	<0.001
Knee Function Score
Active	52.6 ± 17.6	61.8 ± 16.8	71 ± 16.8	<0.001
Control	56.0 ± 14.8	56.4 ± 17.0	51.4 ± 16.9
P value	0.20	0.23	<0.001

* Secondary outcome measures: SF-36 Health Survey (0-100 scale) and knee society score (0-100 scale). Mean values are presented as mean ± SD.
† The vertical p-value represent the time by treatment interaction results. This represents the difference between the groups at different points in time. The horizontal p-value represents group differences in the three examination points. This represents the differences in the active group across the three follow-ups. No significant differences were found in the control group.

ISSN: 1471-2474