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 2 Mean values and time by treatment interaction results of primary outcome measures*

Outcome	Baseline	Follow-up (4 weeks)	Final (8 weeks)	P Value†
WOMAC - Pain
Active	5.4 ± 2.7	3.1 ± 2.2	1.9 ± 1.6	<0.001
Control	5.0 ± 2.7	5.1 ± 2.2	5.4 ± 2.7
P Value	0.50	0.002	<0.001
WOMAC - Stiffness
Active	5.7 ± 3.0	3.7 ± 2.5	1.9 ± 2.3	<0.001
Control	5.4 ± 3.3	5.4 ± 3.0	5.2 ± 3.2
P Value	0.67	0.02	<0.001
WOMAC - Function
Active	5.1 ± 2.6	3.1 ± 1.9	1.9 ± 1.5	<0.001
Control	5.2 ± 2.3	5.5 ± 2.2	5.7 ± 2.6
P Value	0.91	<0.001	<0.001
WOMAC - Total Score
Active	5.4 ± 2.6	3.3 ± 2.0	1.9 ± 1.7	<0.001
Control	5.2 ± 2.6	5.3 ± 2.3	5.4 ± 2.6
P value	0.71	0.001	<0.001
ALF Score
Active	36.9 ± 11.5	29.2 ± 8.8	25.3 ± 6.6	<0.001
Control	39.2 ± 16.7	37.7 ± 15.5	38.5 ± 16.3
P value	0.56	0.01	<0.001

* Primary outcome measures: Western Ontario and McMaster Osteoarthritis Index (WOMAC) questionnaire (0-10 cm Scale) and Aggregated locomotor function (ALF) (sec.). 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