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Table 1 Inclusion criteria for patients in the open-label study of APS on patients with OA

From: White blood cell concentration correlates with increased concentrations of IL-1ra and improvement in WOMAC pain scores in an open-label safety study of autologous protein solution

Inclusion Criteria
Male or female ≥40 years
Willingness and ability to comply with the study procedures and visit schedules and ability to follow verbal and written instructions
A standing radiograph of the knee showing a Kellgren grade of 2 or 3 (within 6 months prior to screening or at screening)
Frequency of knee pain on most days (>15 days) over the last month
Diagnosis of unilateral knee OA according to the American College of Rheumatology (ACR) criteria (clinical and radiological categories) based on an x-ray performed within 6 months prior to screening
Body mass index (BMI) ≤40 kg/m2
On the WOMAC LK 3.1 questionnaire, the mean total score of the 5 pain subscale items together must be ≥ 2.0 at screening and at baseline (Day 1 pre-injection)
Failed at least 1 prior conservative OA therapy (physiotherapy and/or simple analgesics)
Signed an IEC-approved ICF
Willingness to abstain from the use of topical pain therapies (e.g., NSAIDs, capsaicin, lidocaine patches, heat patches), intra-articular corticosteroids, and viscosupplementation during the study
Willingness to abstain from systemic pain medications, except for rescue medication (acetaminophen, maximum daily dose ≤ 4 g); also, to abstain from rescue medication for at least 48 h prior to post-screening study visits