Effect of Footwear on the Clinical, Functional, and Biomechanical Aspects in Elderly Women With Knee Osteoarthritis (OA) (OA)
|ClinicalTrials.gov Identifier: NCT01342458|
Recruitment Status : Completed
First Posted : April 27, 2011
Results First Posted : January 12, 2015
Last Update Posted : January 26, 2015
|Condition or disease||Intervention/treatment||Phase|
|Knee Osteoarthritis||Other: Flexible footwear||Phase 1|
- 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 (Clinical Trial)|
|Actual Enrollment :||56 participants|
|Intervention Model:||Parallel Assignment|
|Official Title:||Therapeutic Effect of Inexpensive, Flexible and Non-heeled Footwear on the Clinical, Functional and Gait Biomechanics in Elderly Women With Knee Osteoarthritis: a Randomized Clinical Trial|
|Study Start Date :||March 2011|
|Actual Primary Completion Date :||June 2013|
|Actual Study Completion Date :||June 2013|
Experimental: Intervention Group
Daily use of the intervention Flexible footwear (Moleca®) for 6 months, for at least 42 hours/week (approximately 6 hours/day, 7 days/week). The Moleca® shoe (Calçados Beira Rio S.A., Novo Hamburgo, Rio Grande do Sul, Brazil) is a low-cost women's double canvas, flexible, flat, walking shoe without heels, with a 5-mm anti-slip rubber sole and a 3-mm flat insole of ethylene vinyl acetate that provides only protection but no correction. The mean weight of the shoe is 0.172±0.019 kg (range 0.091 to 0.182 kg), depending on size. This minimalist footwear is commonly worn by the elderly of all social classes and its average cost is US$ 6.25.
Other: Flexible footwear
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.
No Intervention: Control Group
During the intervention period, patients from the Control Group (CG) were instructed not to wear Flexible footwear (Moleca®) or other similar minimalist footwear. During everyday activities, the CG group was only permitted to wear a standard, neutral tennis shoe. At the end of the intervention period, all CG participants also received one pair of Moleca® shoes at no cost.
- Western Ontario and McMaster Universities (WOMAC) Pain Subscale [ Time Frame: 6 month ]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.
- WOMAC Stiffness Subscale [ Time Frame: 6 month ]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.
- WOMAC Physical Function Subscale [ Time Frame: 6 month ]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.
- WOMAC Total Score [ Time Frame: 6 month ]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.
- Global Score of the Lequesne´s Questionaire Algo-functional. [ Time Frame: 6 month ]This questionaire consists of three sections (eleven questions): about pain or discomfort, the maximum distance that the patient can walk, and activities of daily living. Scores range from zero to twenty-four, meaning cases without involvement and with extremely severe impairment, respectively.
- Six-minute Walk Test [ Time Frame: 6 month ]The six-minute walk test assesses distance in meters walked over 6 minutes.
- First Peak of the Knee Adduction Moment (KAM) During Gait. [ Time Frame: 6 month ]The first peak of the external knee moment was calculated by mean inverse dynamics approach. To this procedure, we used the kinematics data of the lower limbs assessed with six infrared cameras and the ground reaction force evaluated by mean a force platform. This is a continuous measure.
- Paracetamol Intake [ Time Frame: 6 month ]Paracetamol intake (500 mg), number of tablets per month.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01342458
|University of Sao Paulo General Hospital|
|Sao Paulo, Brazil|
|Principal Investigator:||Isabel CN Sacco, PhD||Department of Physical therapy, Speech, and Occupational Therapy, School of Medicine, University of Sao Paulo|