Dr. Armaghan Mahmoudian

OBJECTIVE: To synthesize the literature and generate evidence and gap maps examining randomized controlled trial interventions and outcome measures for patellofemoral pain (PFP). DESIGN: A systematic evidence and gap map. LITERATURE SEARCH: PubMed, CINAHL Complete via EBSCO, PEDro, Scopus, SPORTDiscus (EBSCO), Embase via Ovid, Cochrane Database of Systematic Reviews via Ovid, Web of Science, and CENTRAL. STUDY SELECTION CRITERIA: Peer-reviewed randomized controlled trials (RCTs), pilot RCTs, and pilot feasibility RCTs evaluating interventions for PFP. DATA SYNTHESIS: Interventions were mapped against outcomes. The Cochrane Risk of Bias tool was used to assess risk of bias, and the PFP diagnosis checklist was used to assess the criteria used in each study to confirm a diagnosis of PFP. RESULTS: 307 studies were included. The most frequently included intervention was physical intervention, particularly therapeutic exercises (n=281, 82%), 59 studies (19%) included non-physical interventions. Pain outcomes were included in 274 studies (89%), and patient-reported physical function in 216 (70%). Other outcomes, such as activity or movement-related psychological factors, quality of life, and sleep, were infrequently assessed (each <10%). 207 studies (67%) were at high risk of bias, and 45 studies (15%) met the recommended PFP diagnostic criteria checklist. CONCLUSION: Among 307 RCTs, with approximately three-quarters published in the past 10 years, there was an uneven focus on physical interventions and pain and physical function outcomes.

Classification criteria for early-stage symptomatic knee osteoarthritis (EsSKOA) should discriminate individuals with EsSKOA from those with other causes of knee symptoms. We sought to identify conditions in the differential diagnosis of EsSKOA in adults with knee symptoms.
We conducted an online survey of clinicians. Those consulting monthly on at least five people with undiagnosed knee symptoms were eligible. From qualitative work and clinical experience, we developed three case scenarios representing possible EsSKOA: 1. 40-year-old with 1-month of knee stiffness and swelling; 2. 50-year-old with 8-months of knee discomfort while walking; and 3. 60-year-old with intense knee discomfort getting out of a car 1 week ago. For each scenario, participants indicated conditions on a pre-defined list that they would consider in the differential diagnosis, and the top three diagnoses based on clinical experience. The proportions that considered each condition and among the top three diagnoses for each scenario were summarized overall and by clinical discipline.
127 clinicians responded (43% female, 48% in practice ≤15 years, 50% university-affiliated practice, 7 clinical disciplines). Knee OA and meniscal injuries were among the top three conditions in the differential diagnosis for all three scenarios, followed by immune-mediated and crystal-induced inflammatory arthritis (scenario 1), patellofemoral pain syndrome (scenario 2), and collateral ligament injuries (scenario 3).
The differential diagnosis for EsSKOA in adults presenting with undiagnosed knee symptoms includes symptomatic established radiographic knee OA, patellofemoral pain syndrome, meniscal and collateral ligament injuries, and immune-mediated and crystal-induced inflammatory arthritis.

Objectives
Within the first phase of developing classification criteria for Early-stage Symptomatic Knee Osteoarthritis (EsSKOA), among individuals with knee osteoarthritis (OA) we explored: 1) symptoms within the first year of noticing their knee(s); 2) features that indicated OA was the cause; and 3) timing and reasons that initially prompted seeking healthcare.
Design
We conducted a cross-sectional online survey of individuals with knee OA recruited from Australia, Canada, the Netherlands, and the USA. Only individuals who indicated they recalled their first symptoms were eligible. Using free-text, participants described changes in how their knee looked, felt, moved, their overall state within the first year of noticing their knee(s), features perceived to indicate knee OA was the cause, and reasons for initially seeking healthcare. We assessed timing of seeking care by an ordinal scale. Data were analyzed using descriptive statistics and summative content analysis.
Results
We included 92 participants (median age 67 years [IQR 59,75], 69% women, median BMI 26 kg/m2 [IQR 24,30]). Within the first year from onset, frequently reported symptoms were knee pain (70%), swelling (58%), crepitus (42%), stiffness (29%), and instability (24%). While few could provide specific clinical features, approximately half (53%) perceived medical imaging as important to indicate OA. Only 35% sought healthcare within the first year of experiencing symptoms.
Conclusions
Individuals with knee OA recalled varied knee symptoms within the first year and few sought healthcare. We were unable to ascertain, from the perspective of patients, specific clinical features that indicated they had OA and not another condition.