Low Power Laser and Exercise in Osteoarthritis of the Knee: a Randomized Clinical Trial

Phase 2

Completed

• Conditions: Osteoarthritis
• Interventions: Other: Laser; Other: Placebo Laser

• Registration Number: NCT01306435
• Lead Sponsor: University of Sao Paulo General Hospital

Brief Summary

Indroduction: Knee osteoarthritis (OA) is a painful condition causing disability, weakness and poor quality of live. The results are very consistent about the benefits of laser and exercises to improve pain and function in subjects with knee osteoarthritis Objectives: To investigate the effects of Low Power Laser (LBP) associated with exercise in pain, function, range of motion, muscle strength and quality of life of patients with knee osteoarthritis.

Methods: Forty patients of both sexes aged between 50 and 75 years with knee osteoarthritis (grade 2-4) were randomized into two groups: Laser-LBP-active dose of 3J more exercises and Group Placebo-LBP- placebo and exercise. Were evaluated for pain, function, range of motion, muscle strength and quality of life on three occasions: before starting treatment (evaluation 1), 3 weeks after laser application (evaluation 2) and 8 weeks after completion of exercise (evaluation 3). There were 33 physical therapy sessions three times a week, on March 1 and the laser was applied in the other, only the exercises.

Detailed Description

Pain: Pain intensity was measured with the Visual Analogue Scale (VAS) which is a straight 10 cm long devoid of numbers, in which there is only an indication of the extreme left of "no pain" and extreme right to "unbearable pain". The higher the score, the greater the pain.

Feature: Survey conducted by Lequesne, which is an index composed of 11 questions about pain, discomfort and function. The scores range from 0 to 24 (without affecting the extremely severe, respectively), the higher the score, the greater the impairment.

Range of motion (ROM): ADM flexion and knee extension was measured using a universal goniometer (AESCULAP) with the patient prone second methodology Marques.

Muscular Strength: To assess the maximal isometric strength of the quadriceps muscle was used Dynamometer model Lafayette ® Portable (USA), while seated at 60 ° of knee flexion and this gradation was controlled with a goniometer. Patients remained seated on the stretcher and held steady with thigh extension strength, the dynamometer being maintained in the distal leg. Three measurements were taken, and the mean value.

Quality of Life: The Questionnaire was used Western Ontario and McMaster Universities Osteoarthritis (WOMAC)a self-assessment that evaluates pain, stiffness and physical activity. The higher the score, the greater the impact of OA on quality of life.

Study Timeline

• Study Start: 2009-11
• Primary Completion: 2010-12
• Status Verified: 2011-02
• Study Completion: 2011-02
• Study First Submitted: 2011-02-23
• Study First Submitted QC: 2011-02-28
• Last Update Submitted: 2011-02-28
• Study First Posted: 2011-03-01
• Last Update Posted: 2011-03-01

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 40

Inclusion Criteria

• Diagnoses of osteoarthritis
• Knee pain
• Functional reduction in the last three months
• Grade 2-4 OA
• Fulfilled at least one of the classification criteria of the American College of Rheumatology

Exclusion Criteria

• Cancer
• Diabetes mellitus
• Symptomatic hip OA
• Antidepressants
• Anti-inflammatory steroidal and nonsteroidal or tranquilizers in the last six months and throughout the treatment

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Laser Group	Laser	-
Placebo Group	Placebo Laser	-

Primary Outcome Measures

Name	Time	Method
Change from baseline in VAS at 3 and 8 weeks	baseline, 3 and 8 weeks	In the VAS the subject marks the intensity of its pain in a centimeter horizontal line

Secondary Outcome Measures

Name	Time	Method
Change from baseline in Lequesne at 3 an 8 weeks	baseline, 3 and 8 weeks	Lequesne index is a composite of 11 questions about pain, discomfort and function. The scores range from 0 to 24 (without affecting the extremely severe, respectively), the higher the score, the greater the impairment.
Change from baseline in range of motion	baseline, 3 and 8 weeks	ADM flexion and knee extension was measured using a universal goniometer (AESCULAP) with the patient prone
Change from baseline in Muscular Strength at 3 and 8 weeks	baseline, 3 and 8 weeks	To assess the maximal isometric strength of the quadriceps muscle was used Dynamometer model Lafayette ® Portable (USA), while seated at 60 ° of knee flexion and this gradation was controlled with a goniometer. Patients remained seated on the stretcher and held steady with thigh extension strength, the dynamometer being maintained in the distal leg. Three measurements were taken, and the mean value
Change from baseline in Quality of Life at 3 and 8 weeks	baseline, 3 and 8 weeks	The Questionnaire was used Western Ontario and McMaster Universities Osteoarthritis (WOMAC) a self-assessment that evaluates pain, stiffness and physical activity. The higher the score, the greater the impact of OA on quality of life.

Trial Locations

Locations (1)

University of São Paulo General Hospital; 🇧🇷 São Paulo, Brazil