A 2-year, European Multicentre Study to Describe, Validate, and Predict Phenotypes of Knee Osteoarthritis (APPROACH)
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| ClinicalTrials.gov Identifier: NCT03883568 |
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Recruitment Status :
Active, not recruiting
First Posted : March 21, 2019
Last Update Posted : November 18, 2020
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Rationale: Despite a large and growing disease burden in osteoarthritis (OA), many pharmaceutical companies have abandoned OA drug development. This is mainly due to the lack of appropriate outcome measures that can robustly identify patients that can benefit from a specific therapy. Different phenotypes of OA may benefit from different types of treatment. Therefore, novel markers to identify selected phenotypes of osteoarthritis may encourage drug development.
Objective: To prospectively describe in detail pre-identified progressing phenotypes of patients with knee OA by use of conventional and novel clinical, imaging, and biochemical (bio)markers, and to validate and refine a predictive model for these (and new) progressing phenotypes based on these markers.
Study design: APPROACH is an exploratory, European, five-centre, 2-year prospective follow-up, cohort study, with extensive measurements. In this study patients are treated according to regular care by their own physician with no study related treatment prescribed. Study related diagnostic and/or monitoring procedures are applied to the patients.
Study population: Patients with tibiofemoral knee osteoarthritis, according to the clinical ACR classification criteria, pre-identified based on demographic (e.g. age), clinical (e.g. Pain NRS) and tissue structure (e.g. radiographic joint space width) parameters.
Main study parameters/endpoints: Joint tissue structure based on radiographs, MRI, and biochemical (bio)markers as well as symptoms (pain, function) and quality of life by questionnaires.
Secondary parameters: A multitude of (novel and conventional) clinical, imaging, and biochemical parameters related to osteoarthritis.
Nature and extent of the burden and risks associated with participation, benefit and group relatedness: The participants will not have any direct benefit from their participation in this study other than that their OA is maximally diagnosed and followed in detail for up to 2 years (screening, baseline, 6 months, 12 months, 24 months).
| Condition or disease |
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| Knee Osteoarthritis |
| Study Type : | Observational |
| Actual Enrollment : | 297 participants |
| Observational Model: | Cohort |
| Time Perspective: | Prospective |
| Official Title: | A 2-year Multicentre, EU, Exploratory Study Without Therapeutic Benefit in Patients With Knee Osteoarthritis to Describe, Validate, and Predict Phenotypes of Knee Osteoarthritis by Use of Clinical, Imaging, and Biochemical (Bio)Markers. |
| Actual Study Start Date : | January 19, 2018 |
| Estimated Primary Completion Date : | December 1, 2021 |
| Estimated Study Completion Date : | December 1, 2021 |
- OA structural progression of the index knee [ Time Frame: over two years ]radiographic joint space width in mm
- OA pain progression of the index knee [ Time Frame: over two years ]increase in points in Knee Osteoarthritis Outcome Score for pain (0-100; 0 worst, 100 best condition)
- OA progression of the index knee [ Time Frame: over two years ]structural progression (e.g. cartilage volume on MRI in mm3)
- OA progression [ Time Frame: over two years ]structural progression (biochemical markers in units/ml in blood and urine)
Biospecimen Retention: Samples With DNA
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
| Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
| Sexes Eligible for Study: | All |
| Accepts Healthy Volunteers: | No |
| Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Informed consent obtained.
- Ambulatory (able to walk unassisted)
- At least 18 years of age
- Capable of understanding the study
- Capable of writing and reading in local language
- Predominantly tibiofemoral knee osteoarthritis and satisfy the clinical classification criteria of the American College of Rheumatology (ACR): Knee pain and three of the following criteria: over 50 years age, less than 30 minutes of morning stiffness, crepitus on active motion, bony tenderness, bony enlargement, or no palpable warmth.
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Highest probability to progress based on the algorithm based on the following parameters:
- Knee Injury and Osteoarthritis Outcome Score (KOOS) questionnaire
- BMI (in recording height and weight)
- Pain NRS of the index knee at the moment of the screening visit
- Pain NRS of the index knee during the last week before the screening visit
- Age
- Gender
- KIDA parameters of the index knee, based on standardized weight-bearing (KIDA) radiograph, measured < 3 months (patients with a Joint Space Width (JSW) < 2 mm of the index knee will not be included)
Exclusion Criteria:
- Not being able to comply to the protocol
- Participating in a trial with local therapeutic intervention for index knee OA (pharmaceutical or surgical) or systemic Disease Modifying OsteoArthritic Drugs (DMOADs) or potential DMOADs treatments for OA at the same time or within the past 6 months or anticipated in the forthcoming; participation in non-interventional registries or epidemiological studies is allowed.
- Surgery of the index knee in the past 6 months (to avoid interferences with imaging)
- Scheduled or expected surgery of the index knee in the next 2 years (to avoid interferences with imaging)
- Pregnancy (child bearing woman) because of imaging (radiation and MRI, risks)
- Predominantly patellar femoral knee OA (clinical judgment)
- The following secondary osteoarthritis of the knee: clinically significant deformities of the lower limbs (varus >10°, valgus >10°), septic arthritis, inflammatory joint disease, gout, major chondrocalcinosis (pseudogout), Paget's disease of the bone, ochronosis, acromegaly, haemochromatosis, Wilson's disease, rheumatic symptoms due to malignancies, primary osteochondromatosis, osteonecrosis, osteochondritis dissecans, haemophilia
- Generalized pain syndrome, for example fibromyalgia
- Patients with contra indication to MRI or CT
- Hip replacement or expected hip replacement within 6 months
- Osteosynthesis material near the knee joint
- Self-reported severe Intervertebral disc (IVD) degeneration or facet OA
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03883568
| France | |
| Saint-Antoine hospital, AP-HP | |
| Paris, France | |
| Netherlands | |
| Leiden University Medical Center | |
| Leiden, Netherlands | |
| UMC Utrecht | |
| Utrecht, Netherlands, 3584 CX | |
| Norway | |
| Diakonhjemmet hospital | |
| Oslo, Norway | |
| Spain | |
| SERGAS | |
| A Coruña, Spain | |
| Study Director: | Floris PJ Lafeber, PhD | UMC Utrecht |
| Responsible Party: | F.P.J.G. Lafeber, Professor, director of research, UMC Utrecht |
| ClinicalTrials.gov Identifier: | NCT03883568 |
| Other Study ID Numbers: |
APPROACH-OA-P01 |
| First Posted: | March 21, 2019 Key Record Dates |
| Last Update Posted: | November 18, 2020 |
| Last Verified: | November 2020 |
| Studies a U.S. FDA-regulated Drug Product: | No |
| Studies a U.S. FDA-regulated Device Product: | No |
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phenotypes (bio)markers |
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Osteoarthritis Osteoarthritis, Knee Arthritis |
Joint Diseases Musculoskeletal Diseases Rheumatic Diseases |

