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Table 4 Arthroscopy findings and treatment procedures among patients in the arthroscopy group

From: Knee arthroscopy and exercise versus exercise only for chronic patellofemoral pain syndrome: a randomized controlled trial

    Kujala score
Arthroscopy findings Number of arthroscopy findings in 28 knees Treatment procedures at baseline, mean (SD) at 9-month follow-up, mean (SD) mean change (95% CI)
Articular cartilage lesion; no other findings      
   Grade I 1 No treatment 52.0 58.0 6.0
   Grade II 4 No treatment 68.0 (11.1) 86.3 (11.0)1 14.8 (9.5 to 20.0)1
   Grade III 8 Shaving 66.1 (13.0) 82.0 (12.5) 15.9 (8.7 to 23.0)
   Grade IV 1 Shaving 51.0 59.0 8.0
Inflamed/scarred plicae; no other findings 4 Resection 73.0 (10.1) 79.8 (8.8) 6.8 (-11.5 to 25.0)
Meniscal lesion; no other findings 1 Partial resection 72.0 52.0 -20.0
Patellar subluxation; no other findings 1 No treatment 71.0 66.0 -5.0
Patellofemoral dysplasia; no other findings 1 Lateral capsular discision 74.0 98.0 24.0
Articular cartilage lesion and inflamed/scarred plicae 1 Shaving and plica partial resection 66.0 93.0 27.0
Articular cartilage lesion and meniscal lesion 1 Shaving and meniscal partial resection 74.0 100.0 26.0
Normal findings 5 No treatment 72.2 (11.7) 89.2 (9.5) 17.0 (1.6 to 32.4)
  1. 1N = 3; one patient lost to 9-month follow-up