EFFECT OF KINESIO TAPING ON PAIN, EDEMA, MUSCLE STRENGTH, PHYSICAL FUNCTION AND GLOBAL PERCEPTION OF CHANGE IN ELDERLY WOMAN WITH KNEE OSTEOARTRITE: RANDOMIZED, CONTROLLED, BLIND TRIAL
Osteoarthritis. Knee. Pain. Muscle strength. Edema. Kinesiotape.
INTRODUCTION: Osteoarthritis (OA) is one of the most common diseases in the elderly population and the knee is one of the most affected joints, representing a potential cause of disability and reduced quality of life. In this perspective, kinesio taping (KT) appears as a cheap and practical therapeutic alternative for the treatment of these individuals. However, the current evidence on this technique is limited and conflicting, which means that its effects on the symptomatology of the disease are still uncertain. OBJECTIVE: To analyze the effects of KT application on pain, muscle strength, edema, physical function and overall perception of change in elderly women with knee OA (KOA). MATERIALS AND METHODS: In this randomized, blinded trial, 45 elderly women were allocated to three groups: G1 (placebo group), who received the application of KT without tension on the rectus femoris and knee; G2 (control group), submitted to a class on KOA; and G3 (intervention group) in which two KT techniques were applied simultaneously with 30% and 10% tension, respectively, on the rectus femoris and the knee. The pain was evaluated by Visual Analogue Scale (EVA), quadriceps muscle strength by handheld dynamometry, physical function by the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) questionnaire and the 6-minute Walk Test (6MWT). Furthermore, edema was measured by knee perimetry and the overall perception of change by the Patient Global Impression of Change. All volunteers were evaluated before, immediately after and 72 hours after the intervention. The Kolmogorov-Smirnov and Levene tests were applied to evaluate the normality and homogeneity of the data, respectively. Intra and intergroup comparisons were evaluated using analysis of variance ANOVA of mixed model. In the presence of a significant F, the Benferroni pot-hoc test was used to identify where the difference occurred. For all statistical analyzes a significance level of 5% (p <0.05) and 95% confidence interval (95% CI) were adopted. Statistical analysis was performed using SPSS® software (Statistical Package Social Science) version 20.0. RESULTS: The intragroup analysis showed an improvement in pain in favor of the placebo group and intervention, in addition to the increase of quadriceps strength in the placebo group. Physical function improved in all groups assessed. On the other hand, no improvement was observed in relation to edema in any of the groups. In the intergroup analysis, no significant differences were observed for any of the variables analyzed in either group. Finally, volunteers in the intervention and placebo groups reported experiencing some beneficial change with treatment. CONCLUSION: KT is not able to improve pain, quadriceps muscle strength, edema and physical function of elderly women with KOA.