Comparing Knee Cartilage Surgery Versus Standard Physical Therapy in Treating People With a Meniscal Tear and Osteoarthritis

• Sponsor: Brigham and Women's Hospital (Other)
• Overall Status: Active, not recruiting
• CT.gov ID: NCT00597012
• Collaborator: (none)
• Enrollment: 351
• Locations: 7
• Arms: 2
• Duration (Months): 207
• Patients Per Site: 50.1
• Patients Per Site Per Month: 0.2

Study Details

Study Description

Brief Summary

There are two cartilage structures, called menisci, in each knee joint. A torn meniscus can be caused by a traumatic injury or aging-related degeneration. Osteoarthritis (OA) is a type of arthritis that is caused by the breakdown and eventual loss of another type of cartilage that covers the end of bones within a joint. In people who have knee OA, a meniscal tear can easily lead to disability. This study will compare the effectiveness of two recommended treatments, surgery and physical therapy, for people with a torn meniscus and knee OA.

Condition or Disease	Intervention/Treatment	Phase
Osteoarthritis	Procedure: Arthroscopic partial menisectomy; Other: Standard physical therapy; Other: Postoperative rehabilitative physical therapy	N/A

Detailed Description

OA is the most common form of arthritis in the United States. Symptoms of knee OA include pain in and around the knee that typically worsens with weight-bearing activities, morning stiffness, and tenderness. A person with OA who experiences a torn meniscus--a cartilage structure within the knee that provides stability and proper weight distribution--is especially at risk for disability. Past studies have shown that arthroscopic partial meniscectomy (APM), a type of knee surgery, usually relieves symptoms and improves function in people suffering from a meniscal tear. However, the success of APM is more variable among people with already existing OA. Clinicians are also uncertain about the short- and long-term benefits, drawbacks, and indications for APM in people with OA and meniscal tears. The purpose of this study is to compare the effectiveness of two treatments, APM surgery and standard physical therapy, for people with OA and a torn meniscus.

This study will last 12 years. At the initial study visit, participants will be randomly assigned to one of two groups.

• Group 1 participants will undergo APM surgery at a time that is convenient for the participant and surgeon. After surgery, participants will be referred for rehabilitative physical therapy to regain strength and flexibility of the knee. For participants who choose to do physical therapy, the duration of treatment will depend on individual progress.

• Group 2 participants will receive standard physical therapy to increase strength and flexibility of the knee. This will include one to three weekly exercise sessions over an 8-week period.

The study consists of up to 5 visits to the center:

• Visit 1, the enrollment visit: sign the consent form, fill out a questionnaire, have a physical examination of the knee and find out your treatment group (surgery or physical therapy

• Visit 2, at 3 months after enrollment: Fill out a questionnaire and have a physical examination of the knee

• Visit 3, at 18 months: Fill out a questionnaire, have an MRI of the knee (if eligible) and xrays of both knees

• Visit 4, at 5 years: Fill out a questionnaire, have an MRI of the knee (if eligible) and xrays of both knees

• Visit 5, at 12 years: Fill out a questionnaire, have a physical examination of the knee, have an MRI of the knee (if eligible) and xrays of both knees

Telephone calls: During the first 3 months of the study, all participants will receive check-up phone calls every 2 weeks, followed by quarterly phone calls for the initial 2 years in the study

Questionnaires: Participants will also complete mailed questionnaires at 6 months, and 1, 2, 2.5, 3, 3.5, 4, 4.5, 5, and 12 years after enrollment. The questionnaires will include questions about knee pain, ability to walk, recreational activities, general health, and satisfaction with with treatment.

Study Design

• Study Type: Interventional
• Actual Enrollment: 351 participants
• Allocation: Randomized
• Intervention Model: Parallel Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: Partial Meniscectomy Versus Nonoperative Management in Meniscal Tear With OA: A Randomized Controlled Trial (MeTeOR)
• Study Start Date: May 1, 2008
• Actual Primary Completion Date: Feb 1, 2012
• Anticipated Study Completion Date: Aug 1, 2025

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Surgical Participants will undergo arthroscopic partial menisectomy (APM) surgery and offered postoperative rehabilitative physical therapy.	Procedure: Arthroscopic partial menisectomy; Arthroscopic partial meniscectomy is a surgical procedure that is performed to remove a piece of torn cartilage in the knee joint. Incisions for arthroscopy are quite small, usually about 1 centimeter each. The torn meniscus can be removed using a number of different instruments, including small shavers and scissors.; Other: Postoperative rehabilitative physical therapy; This physical therapy is geared specifically toward rehabilitation after APM surgery.
Active Comparator: Nonoperative Participants will undergo standard physical therapy that will include strengthening and stretching sessions one to three times a week for 8 weeks.	Other: Standard physical therapy; Participants will undergo standard physical therapy that will include strengthening and stretching sessions one to three times a week for 8 weeks. This physical therapy regimen will have similar elements and goals as the postoperative intervention offered to Group 1 participants.

Outcome Measures

Primary Outcome Measures

1. WOMAC Functional Status - Difference From Baseline [Baseline and 6 months]

   Scores on the physical-function subscale of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) range from 0 to 100, with higher scores indicating more limitation of physical function. The primary outcome was the difference between the study groups with respect to the change in the score on the physical-function scale of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) from baseline to 6 months after randomization.

Secondary Outcome Measures

1. KOOS Pain - Difference From Baseline [Baseline to 6 months]

   Scores on the pain scale of the Knee Injury and Osteoarthritis Outcome Scale (KOOS) range from 0 to 100, with higher scores indicating more pain. The secondary outcome was the difference between the study groups with respect to the change in the score on the pain scale of the Knee Injury and Osteoarthritis Outcome Scale (KOOS) from baseline to 6 months after randomization.

2. SF-36 Physical Functional Status Scale - Difference From Baseline [6 months]

   Scores on the physical-activity scale of the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) range from 0 to 100, with higher scores indicating greater physical activity.

3. Total Knee Replacement - Subjects Received [Baseline to 60 months]

   Number of subjects that elected to undergo Total Knee Replacement or Total Knee Arthroplasty between baseline and 60 month follow up. Intended to show the total number of participants that underwent Total Knee Replacement in the period following the initial intervention through 60 month follow up.

4. KOOS Pain - Mean at 60 Months [60 months]

   Scores on the pain scale of the Knee Injury and Osteoarthritis Outcome Scale (KOOS) range from 0 to 100, with higher scores indicating more pain. The secondary outcome was the mean KOOS pain for each of the study groups 60 months after randomization.

Eligibility Criteria

Criteria

• Ages Eligible for Study: 45 Years and Older
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Inclusion Criteria:

• OA symptoms lasting at least 1 month and managed with medications, activity limitations, and/or physical therapy

• At least one symptom consistent with a torn meniscus. Symptoms may include clicking, catching, popping, giving way, pain with pivot or torque, episodic pain, and/or pain that is acute and localized to one joint line.

• Available knee X-ray (within 6 months) and MRI (within 3 years)

• Evidence of osteophyte formation or cartilage fissure, tear, or loss on a knee MRI OR plain radiographic evidence of osteophyte formation or joint space narrowing

• Evidence of a meniscal tear (tear extending to surface of meniscus) on a knee MRI

• Willingness to undergo random assignment and sign an informed consent

Exclusion Criteria:

• Chronically locked knee

• Kellgren-Lawrence Grade IV status, indicating advanced OA and usually the need for total knee replacement

• Contraindication to MRI

• Radiographic chondrocalcinosis (a condition in which there are deposits of calcium pyrophosphate dihydrate [CPPD] crystals in one or more joints that eventually result in damage to the affected joints) AND acute symptomatic pseudogout

• Inflammatory diseases (e.g., rheumatoid arthritis, psoriatic arthritis, systemic lupus erythematosus, gout, pseudogout)

• Injection with viscosupplementation in the affected knee in the 4 weeks before study entry

• Any medical contraindications to surgery or physical therapy

• Both knees are symptomatic for meniscal tears and a candidate for bilateral APMs

• Prior surgery on an affected knee

• Pregnancy or possible pregnancy

• Claim filed for worker's compensation

• Unable or unwilling to give informed consent

• Unable or unwilling to attend physical therapy sessions at designated locations or in the community

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Rush University Medical Center	Chicago	Illinois	United States	60612
2	Brigham and Women's Hospital	Boston	Massachusetts	United States	02115
3	Mayo Clinic	Rochester	Minnesota	United States	55905
4	Washington University in St Louis, School of Medicine	Saint Louis	Missouri	United States	63110
5	Hospital for Special Surgery	New York	New York	United States	10021
6	Cleveland Clinic	Cleveland	Ohio	United States	44195
7	Vanderbilt University	Nashville	Tennessee	United States	37232

Sponsors and Collaborators

• Brigham and Women's Hospital

Investigators

• Principal Investigator: Jeffrey N. Katz, MD, MS, Brigham and Women's Hospital

Study Documents (Full-Text)

None provided.

More Information

Publications

• Collins JE, Losina E, Marx RG, Guermazi A, Jarraya M, Jones MH, Levy BA, Mandl LA, Martin SD, Wright RW, Spindler KP, Katz JN; MeTeOR Investigator Group. Early Magnetic Resonance Imaging-Based Changes in Patients With Meniscal Tear and Osteoarthritis: Eighteen-Month Data From a Randomized Controlled Trial of Arthroscopic Partial Meniscectomy Versus Physical Therapy. Arthritis Care Res (Hoboken). 2020 May;72(5):630-640. doi: 10.1002/acr.23891.
• Deshpande BR, Losina E, Smith SR, Martin SD, Wright RJ, Katz JN. Association of MRI findings and expert diagnosis of symptomatic meniscal tear among middle-aged and older adults with knee pain. BMC Musculoskelet Disord. 2016 Apr 11;17:154. doi: 10.1186/s12891-016-1010-2.
• Katz JN, Brophy RH, Chaisson CE, de Chaves L, Cole BJ, Dahm DL, Donnell-Fink LA, Guermazi A, Haas AK, Jones MH, Levy BA, Mandl LA, Martin SD, Marx RG, Miniaci A, Matava MJ, Palmisano J, Reinke EK, Richardson BE, Rome BN, Safran-Norton CE, Skoniecki DJ, Solomon DH, Smith MV, Spindler KP, Stuart MJ, Wright J, Wright RW, Losina E. Surgery versus physical therapy for a meniscal tear and osteoarthritis. N Engl J Med. 2013 May 2;368(18):1675-84. doi: 10.1056/NEJMoa1301408. Epub 2013 Mar 18. Erratum in: N Engl J Med. 2013 Aug 15;369(7):683.
• Katz JN, Chaisson CE, Cole B, Guermazi A, Hunter DJ, Jones M, Levy BA, Mandl LA, Martin S, Marx RG, Safran-Norton C, Roemer FW, Skoniecki D, Solomon DH, Spindler KP, Wright J, Wright RW, Losina E. The MeTeOR trial (Meniscal Tear in Osteoarthritis Research): rationale and design features. Contemp Clin Trials. 2012 Nov;33(6):1189-96. doi: 10.1016/j.cct.2012.08.010. Epub 2012 Sep 5.
• Katz JN, Shrestha S, Losina E, Jones MH, Marx RG, Mandl LA, Levy BA, MacFarlane LA, Spindler KP, Silva GS; METEOR Investigators, Collins JE. Five-Year Outcome of Operative and Nonoperative Management of Meniscal Tear in Persons Older Than Forty-Five Years. Arthritis Rheumatol. 2020 Feb;72(2):273-281. doi: 10.1002/art.41082. Epub 2019 Dec 15.
• Katz JN, Smith SR, Yang HY, Martin SD, Wright J, Donnell-Fink LA, Losina E. Value of History, Physical Examination, and Radiographic Findings in the Diagnosis of Symptomatic Meniscal Tear Among Middle-Aged Subjects With Knee Pain. Arthritis Care Res (Hoboken). 2017 Apr;69(4):484-490. doi: 10.1002/acr.22975. Epub 2017 Mar 3.
• Katz JN, Wright J, Spindler KP, Mandl LA, Safran-Norton CE, Reinke EK, Levy BA, Wright RW, Jones MH, Martin SD, Marx RG, Losina E. Predictors and Outcomes of Crossover to Surgery from Physical Therapy for Meniscal Tear and Osteoarthritis: A Randomized Trial Comparing Physical Therapy and Surgery. J Bone Joint Surg Am. 2016 Nov 16;98(22):1890-1896. Erratum in: J Bone Joint Surg Am. 2018 Jul 18;100(14):e100.
• Luc-Harkey BA, Safran-Norton CE, Mandl LA, Katz JN, Losina E. Associations among knee muscle strength, structural damage, and pain and mobility in individuals with osteoarthritis and symptomatic meniscal tear. BMC Musculoskelet Disord. 2018 Jul 27;19(1):258. doi: 10.1186/s12891-018-2182-8.
• MacFarlane LA, Yang H, Collins JE, Guermazi A, Jones MH, Spindler KP, Winter AR, Losina E, Katz JN; the MeTeOR Investigator Group, Brophy RH, Cole BJ, Levy BA, Mandl LA, Martin S, Marx RG, Matava M, Safran-Norton C, Stuart M, Wright R. Influence of Baseline Magnetic Resonance Imaging Features on Outcome of Arthroscopic Meniscectomy and Physical Therapy Treatment of Meniscal Tears in Osteoarthritis. Am J Sports Med. 2019 Mar;47(3):612-619. doi: 10.1177/0363546518819444. Epub 2019 Jan 17.
• MacFarlane LA, Yang H, Collins JE, Guermazi A, Jones MH, Teeple E, Xu L, Losina E, Katz JN. Associations among meniscal damage, meniscal symptoms and knee pain severity. Osteoarthritis Cartilage. 2017 Jun;25(6):850-857. doi: 10.1016/j.joca.2016.12.023. Epub 2016 Dec 30.
• MacFarlane LA, Yang H, Collins JE, Guermazi A, Mandl LA, Levy BA, Marx RG, Safran-Norton CE, Losina E, Katz JN; Meniscal Tear in Osteoarthritis Research Investigator Group. Relationship Between Patient-Reported Swelling and Magnetic Resonance Imaging-Defined Effusion-Synovitis in Patients With Meniscus Tears and Knee Osteoarthritis. Arthritis Care Res (Hoboken). 2019 Mar;71(3):385-389. doi: 10.1002/acr.23592.
• MacFarlane LA, Yang H, Collins JE, Jarraya M, Guermazi A, Mandl LA, Martin SD, Wright J, Losina E, Katz JN; MeTeOR Investigator Group. Association of Changes in Effusion-Synovitis With Progression of Cartilage Damage Over Eighteen Months in Patients With Osteoarthritis and Meniscal Tear. Arthritis Rheumatol. 2019 Jan;71(1):73-81. doi: 10.1002/art.40660. Epub 2018 Nov 29.
• Tuakli-Wosornu YA, Selzer F, Losina E, Katz JN. Predictors of Exercise Adherence in Patients With Meniscal Tear and Osteoarthritis. Arch Phys Med Rehabil. 2016 Nov;97(11):1945-1952. doi: 10.1016/j.apmr.2016.05.011. Epub 2016 Jun 11.
• Winter AR, Collins JE, Katz JN. The likelihood of total knee arthroplasty following arthroscopic surgery for osteoarthritis: a systematic review. BMC Musculoskelet Disord. 2017 Oct 4;18(1):408. doi: 10.1186/s12891-017-1765-0. Review. Erratum in: BMC Musculoskelet Disord. 2022 Jul 25;23(1):709.

• Responsible Party: Jeffrey Neil Katz, MD, Professor of Medicine and Orthopedic Surgery, Harvard Medical School; Director, Orthopaedic and Arthritis Center for Outcomes Research, Brigham & Women's Hospital, Brigham and Women's Hospital
• ClinicalTrials.gov Identifier: NCT00597012
• Other Study ID Numbers: R01AR055557
• First Posted: Jan 17, 2008
• Last Update Posted: Oct 30, 2020
• Last Verified: Oct 1, 2020

• Individual Participant Data (IPD) Sharing Statement: No
• Plan to Share IPD: No
• Keywords provided by Jeffrey Neil Katz, MD, Professor of Medicine and Orthopedic Surgery, Harvard Medical School; Director, Orthopaedic and Arthritis Center for Outcomes Research, Brigham & Women's Hospital, Brigham and Women's Hospital: Meniscal Tear; Osteoarthritis; Arthroscopic Partial Meniscectomy; Physical Therapy; Total Knee Arthroplasty; Total Knee Replacement
• Additional relevant MeSH terms: Osteoarthritis

Study Results

Participant Flow

Recruitment Details	The Meniscal Tear in Osteoarthritis Research (MeTeOR) trial was performed in seven academic referral centers with enrollment occurring from June 2008 through August 2011.

Arm/Group Title	Arthroscopic Partial Meniscectomy (APM)	Physical Therapy (PT)
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were offered postoperative rehabilitative physical therapy.	Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
Period Title: Overall Study
STARTED	174	177
COMPLETED	161	169
NOT COMPLETED	13	8

Baseline Characteristics

Arm/Group Title	Arthroscopic Partial Meniscectomy	Physical Therapy	Total
Arm/Group Description	Participants will undergo arthroscopic partial menisectomy (APM) surgery and offered postoperative rehabilitative physical therapy.	Participants will undergo standard physical therapy that will include strengthening and stretching sessions one to three times a week for 8 weeks.	Total of all reporting groups
Overall Participants	161	169	330
Age, Customized (years) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [years]	59.0 (7.9)	57.8 (6.8)	58.4 (7.3)
Sex: Female, Male (Count of Participants)
Female	90 55.9%	97 57.4%	187 56.7%
Male	71 44.1%	72 42.6%	143 43.3%
Race/Ethnicity, Customized (participants) [Number]
White	138 85.7%	142 84%	280 84.8%
Black or African American	15 9.3%	17 10.1%	32 9.7%
Hispanic	2 1.2%	5 3%	7 2.1%
Other	6 3.7%	5 3%	11 3.3%
Index Knee (participants) [Number]
Right	70 43.5%	68 40.2%	138 41.8%
Left	91 56.5%	101 59.8%	192 58.2%
Mean Body-Mass Index (kg/m^2) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [kg/m^2]	30.0 (6.1)	30.0 (6.1)	30.0 (6.1)
WOMAC physical-function score (Units on a scale) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [Units on a scale]	37.1 (17.9)	37.5 (18.3)	37.3 (18.1)
KOOS pain score (Units on a scale) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [Units on a scale]	46.0 (15.5)	47.2 (16.4)	46.6 (16.0)
Mental Health Index 5 score (Units on a scale) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [Units on a scale]	74.8 (12.9)	74.0 (13.9)	74.4 (13.5)
SF-36 Physical Activity score (Units on a scale) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [Units on a scale]	44.3 (23.7)	43.3 (23.3)	43.8 (23.5)
Kellgren-Lawrence grade (participants) [Number]
0	34 21.1%	36 21.3%	70 21.2%
1	26 16.1%	35 20.7%	61 18.5%
2	37 23%	39 23.1%	76 23%
3	45 28%	39 23.1%	84 25.5%

Outcome Measures

1. Primary Outcome

Title	WOMAC Functional Status - Difference From Baseline
Description	Scores on the physical-function subscale of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) range from 0 to 100, with higher scores indicating more limitation of physical function. The primary outcome was the difference between the study groups with respect to the change in the score on the physical-function scale of the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) from baseline to 6 months after randomization.
Time Frame	Baseline and 6 months

Outcome Measure Data

Analysis Population Description

[Not Specified]

Arm/Group Title	Arthroscopic Partial Meniscectomy	Physical Therapy
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were referred for postoperative rehabilitative physical therapy.	Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
Measure Participants	161	169
Mean (95% Confidence Interval) [Score]	20.9	18.5

Statistical Analysis 1

Statistical Analysis Overview	Comparison Group Selection	Arthroscopic Partial Meniscectomy, Physical Therapy
	Comments	The primary analysis was implemented with an analysis of covariance with changes in the WOMAC physical-function score from baseline to 6 months as the dependent variable, treatment as the independent variable of interest, and study site as a covariate. The primary analysis used a modified intention-to-treat approach in which patients who did not withdraw from the study were evaluated in the group to which they were randomly assigned.
	Type of Statistical Test	Superiority or Other (legacy)
	Comments
Statistical Test of Hypothesis	p-Value	0.26
	Comments
	Method	ANCOVA
	Comments
Method of Estimation	Estimation Parameter	Mean Difference (Final Values)
	Estimated Value	2.4
	Confidence Interval	(2-Sided) 95%; -1.8 to 6.5
	Parameter Dispersion	Type: Value:
	Estimation Comments

2. Secondary Outcome

Title	KOOS Pain - Difference From Baseline
Description	Scores on the pain scale of the Knee Injury and Osteoarthritis Outcome Scale (KOOS) range from 0 to 100, with higher scores indicating more pain. The secondary outcome was the difference between the study groups with respect to the change in the score on the pain scale of the Knee Injury and Osteoarthritis Outcome Scale (KOOS) from baseline to 6 months after randomization.
Time Frame	Baseline to 6 months

Outcome Measure Data

Analysis Population Description

[Not Specified]

Arm/Group Title	Arthroscopic Partial Meniscectomy	Physical Therapy
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were referred for postoperative rehabilitative physical therapy.	Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
Measure Participants	161	169
Mean (95% Confidence Interval) [Score]	24.2	21.3

Statistical Analysis 1

Statistical Analysis Overview	Comparison Group Selection	Arthroscopic Partial Meniscectomy, Physical Therapy
	Comments
	Type of Statistical Test	Superiority or Other (legacy)
	Comments
Statistical Test of Hypothesis	p-Value	0.16
	Comments
	Method	ANCOVA
	Comments
Method of Estimation	Estimation Parameter	Mean Difference (Final Values)
	Estimated Value	2.9
	Confidence Interval	(2-Sided) 95%; -1.2 to 7.0
	Parameter Dispersion	Type: Value:
	Estimation Comments

3. Secondary Outcome

Title	SF-36 Physical Functional Status Scale - Difference From Baseline
Description	Scores on the physical-activity scale of the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) range from 0 to 100, with higher scores indicating greater physical activity.
Time Frame	6 months

Outcome Measure Data

Analysis Population Description

[Not Specified]

Arm/Group Title	Arthroscopic Partial Meniscectomy	Physical Therapy
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were referred for postoperative rehabilitative physical therapy.	Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
Measure Participants	161	169
Mean (95% Confidence Interval) [Score]	24.2	23.1

Statistical Analysis 1

Statistical Analysis Overview	Comparison Group Selection	Arthroscopic Partial Meniscectomy, Physical Therapy
	Comments
	Type of Statistical Test	Superiority or Other (legacy)
	Comments
Statistical Test of Hypothesis	p-Value	0.68
	Comments
	Method	ANCOVA
	Comments
Method of Estimation	Estimation Parameter	Mean Difference (Net)
	Estimated Value	1.1
	Confidence Interval	(2-Sided) 95%; -4.4 to 6.6
	Parameter Dispersion	Type: Value:
	Estimation Comments

4. Secondary Outcome

Title	Total Knee Replacement - Subjects Received
Description	Number of subjects that elected to undergo Total Knee Replacement or Total Knee Arthroplasty between baseline and 60 month follow up. Intended to show the total number of participants that underwent Total Knee Replacement in the period following the initial intervention through 60 month follow up.
Time Frame	Baseline to 60 months

Outcome Measure Data

Analysis Population Description

[Not Specified]

Arm/Group Title	Arthroscopic Partial Meniscectomy	Physical Therapy
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were referred for postoperative rehabilitative physical therapy.	Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
Measure Participants	161	169
Count of Participants [Participants]	16 9.9%	9 5.3%

5. Secondary Outcome

Title	KOOS Pain - Mean at 60 Months
Description	Scores on the pain scale of the Knee Injury and Osteoarthritis Outcome Scale (KOOS) range from 0 to 100, with higher scores indicating more pain. The secondary outcome was the mean KOOS pain for each of the study groups 60 months after randomization.
Time Frame	60 months

Outcome Measure Data

Analysis Population Description

[Not Specified]

Arm/Group Title	Arthroscopic Partial Meniscectomy (APM)	Physical Therapy (PT)
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were offered postoperative rehabilitative physical therapy.	Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
Measure Participants	161	169
Mean (95% Confidence Interval) [score on a scale]	18.2	19.4

Adverse Events

Time Frame	60 months
Arm/Group Title	Arthroscopic Partial Meniscectomy		Physical Therapy
Arm/Group Description	Participants underwent arthroscopic partial menisectomy (APM) surgery and were offered postoperative rehabilitative physical therapy.		Participants underwent standard physical therapy that included strengthening and stretching sessions one to three times a week for 8 weeks.
All Cause Mortality
	Arthroscopic Partial Meniscectomy		Physical Therapy
	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events
Total	1/174 (0.6%)		1/177 (0.6%)
Serious Adverse Events
	Arthroscopic Partial Meniscectomy		Physical Therapy
	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events
Total	3/174 (1.7%)		2/177 (1.1%)
Cardiac disorders
Cardiovascular	2/174 (1.1%)	2	2/177 (1.1%)	2
Vascular disorders
Hypoxemia	1/174 (0.6%)	1	0/177 (0%)	0
Other (Not Including Serious) Adverse Events
	Arthroscopic Partial Meniscectomy		Physical Therapy
	Affected / at Risk (%)	# Events	Affected / at Risk (%)	# Events
Total	15/174 (8.6%)		13/177 (7.3%)
Cardiac disorders
Cardiovascular	6/174 (3.4%)	6	3/177 (1.7%)	3
Musculoskeletal and connective tissue disorders
Muskuloskeletal	7/174 (4%)	7	6/177 (3.4%)	6
Pain in the back, hip, or foot	2/174 (1.1%)	2	4/177 (2.3%)	4

Limitations/Caveats

Surgical randomized controlled trials present methodological challenges, including crossover from one group to the other.

More Information

Certain Agreements

Principal Investigators are NOT employed by the organization sponsoring the study.

There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.