Effect of Footwear on the Clinical, Functional, and Biomechanical Aspects in Elderly Women With Knee Osteoarthritis (OA)

University of Sao Paulo General Hospital56 enrolled

Overview

The purpose of this study is to determine whether inexpensive, flexible and non-heeled footwear is effective in improving of clinical, functional and gait biomechanics in elderly women with knee osteoarthritis.

* The clinical and functional aspects will be evaluated using a visual analogue scale (VAS) for pain, Western Ontario and McMaster Universities (WOMAC) and Lequesne questionnaires of quality of life in patients with knee osteoarthritis and testing of six-minute walk (6MWT). * Biomechanical analysis of gait will be performed by infrared cameras and a force platform. From the data of kinematics and kinetics, will be calculated moments of the knee joint strength by inverse dynamics. The process (steps) will be divided as follows: * step 1, in this step there will be sorting and initial assessment of potential participants; pain will be evaluated through VAS, function and quality of life by means of questionnaires WOMAC and Lequesne and the 6MWT, and by evaluating the biomechanics of gait. * step 2,(3 month follow-up), both groups will be evaluated again by the VAS and WOMAC and Lequesne questionnaires. * step 3, after 6 months of starting the monitoring process, both groups will be reevaluated through the VAS, WOMAC, Lequesne, 6MWT and biomechanical analysis of gait. This step is the final evaluation, characterizing the end of intervention.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Knee Osteoarthritis

Interventions

Flexible footwearOTHER

The patients of the Intervention Group (IG) will be use over 6 month a flexible and non-heeled footwear (Moleca; Calçados Beira Rio S.A., Novo Hamburgo, Rio Grande do Sul, Brazil) is a women's flexible flat walking shoe, without heels, with an anti-slip rubber sole, 5-mm thin, with a 3 mm internal wedge of ethylene vinyl acetate, made out of dubbed canvas. It had a mean weight of 172 ± 19.6 g, ranging from 142 to 193 g depending upon the size.

Eligibility

Sex: FEMALEMin age: 60 YearsMax age: 80 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Kellgren and Lawrence grade 2 or 3 * Being able to walk independently for at least 6 hours per day without the aid of canes or attendant to perform their activities of daily living * Knee pain between 3 and 8 on the visual analogue scale Exclusion Criteria: * Previous history of surgery on knees, ankles and hips in the last 2 years * Neurological disease * BMI \> 35 kg/m2 * Difference in lower limb length \> 1 cm * Prostheses and / or lower limb orthoses * Having received steroid injections and hyaluronic acid intra-articular knee in previous periods of three and six months respectively * Present at the knee joint instability (positive test results in the medial collateral ligament, lateral, anterior and posterior drawer) * OA of the hip and / or ankle incapacitating or diagnosed OA in lower limbs and spine * Inflammatory arthritis (eg. rheumatoid arthritis) * Asymptomatic OA of one or both knees * Dementia or inability to provide consistent information * Introduction of Nonsteroidal Anti-inflammatory Drugs and analgesic medications 8 weeks before inclusion or change of dosage of the same after the inclusion * Being under physiotherapy or acupuncture treatment * Patients with an indication of prosthesis or orthosis * Patients who are already using a flexible and non-heeled shoes for more than 25 hours per week (3 ½ hours per day) over the past 6 months

Locations (1)

University of Sao Paulo General Hospital

São Paulo, São Paulo, Brazil

Outcomes

Primary Outcomes

Western Ontario and McMaster Universities (WOMAC) Pain Subscale

The WOMAC (Western Ontario and McMaster Universities) pain subscale consists of five questions (Likert Scale) relating to the patient's pain in everyday situations. The Likert Scale version used for all WOMAC items are: none, mild, moderate, severe, and extreme. The sum of all items of pain subscale ranges from 0 to 20. Higher scores indicate worse pain.

Time frame: 6 month

Secondary Outcomes

WOMAC Stiffness Subscale

The stiffness subscale included in the WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index) index consists of two questions (Likert Scale) relating articular function of the patient. The Likert Scale version used for all WOMAC items are: none, mild, moderate, severe, and extreme. The sum of all items of the stiffness subscale ranges from 0 to 8. Higher scores on the stiffness WOMAC subscale indicate worse articular function.

Time frame: 6 month

WOMAC Physical Function Subscale

The physical function subscale included in the WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index) index consists of seventeen questions (Likert Scale) relating to the patient's physical activities, or skills to move out and take care of themselves. The Likert Scale version used for all WOMAC items are: none, mild, moderate, severe, and extreme. The sum of all items of physical function subscale ranges from 0 to 68. Higher scores on the physical function WOMAC subscale indicate worse functional limitations.

Time frame: 6 month

WOMAC Total Score

The WOMAC total score is the sum of all subscale (pain, function and stiffness) (Likert Scale) relating to the patient's physical activities, or skills to move out and take care of themselves. The Likert Scale version used for all WOMAC items are: none, mild, moderate, severe, and extreme. The sum of all items ranges from 0 to 96. Higher scores on the WOMAC total score indicate worse condition.

Data from ClinicalTrials.gov

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