The effect of treatment with a non-invasive foot worn biomechanical device on subjective and objective measures in patients with knee osteoarthritis- a retrospective analysis on a UK population

Table 4 Patient reported outcome measures (PROM’s) changes in knee OA patients after 3 and 6 months of treatment. Results are presented as mean (SD) [95% CI]

	Baseline	3 months	6 months	P-value^*
WOMAC^**
Total	41.40 (19.68) [39.58–43.21]	25.32 (19.13) [23.56–27.08]	22.28 (18.13) [20.61–23.96]	< 0.001
Pain subscale	46.71 (18.86) [44.97–48.44]	27.42 (19.72) [25.60–29.24]	23.99 (18.94) [22.25–25.74]	< 0.001
Function subscale	38.97 (21.56) [36.98–40.96]	24.07 (19.78) [22.25–25.9]	21.16 (18.50) [19.45–22.86]	< 0.001
Stiffness subscale	48.74 (25.92) [46.35–51.13]	30.71 (25.92) [28.48–32.95]	27.59 (23.15) [25.45–29.72]	< 0.001
SF-36^***
Total	53.49 (16.08) [52.01–54.97]	62.60 (16.57) [61.08–64.13]	65.22 (16.87) [63.67–66.78]	< 0.001
Physical Component Summary (PCS)	45.67 (18.36) [43.98–47.36]	57.71 (19.85) [55.88–59.54]	61.37 (20.04) [59.52–63.21]	< 0.001
Mental Component Summary (MCS)	64.02 (19.49) [62.23–65.82]	72.30 (18.18) [70.63–73.98]	73.64 (18.12) [71.97–75.31]	< 0.001

*P-value was set to P < 0.05. **Western Ontario and McMaster Universities Index (WOMAC Index). The WOMAC questionnaire includes 24 questions in a Visual Analogue Scale (VAS) format (0 = no pain/stiffness/difficulty, 100 = severe pain/stiffness/difficulty). ***SF-36 Health Survey includes 36 questions. Results range between 0 and 100 (0 = poor quality of life, 100 = high quality of life)
Repeated measure ANOVA’s were performed for the differences between the outcomes, measured at baseline, 3 and 6 months into treatment. Significant differences were found between baseline and 3 months and baseline and 6 months

ISSN: 1471-2474