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Table 1 Inclusion and exclusion criteria

From: Norwegican Cartilage Project - a study protocol for a double-blinded randomized controlled trial comparing arthroscopic microfracture with arthroscopic debridement in focal cartilage defects in the knee

Inclusion criteria Exclusion criteria
-Age 18–50 years old
-Symptomatic cartilage defect
-Lysholm score < 75
-Defect size less than 2 cm2
-Lesion graded ICRS 3–4
- > 50 % intact meniscus
-Stable knee
-Range of motion 5–105°
-Signed written informed consent
- Systemic arthritis
- Osteoarthritis
- Pregnancy
- Language barriers
- Obesity (BMI > 30)
- Comorbidities that may influence surgery or rehabilitation
- Serious alcohol or drug abuse
- Inability to complete questionnaires or rehabilitation
- Malalignment > 5°
- Earlier surgery to the chondral defect excluding OCD surgery