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Table 1 Number of knees (percentage of 20 knees) at each site and at each grade

From: Ultrasound properties of articular cartilage in the tibio-femoral joint in knee osteoarthritis: relation to clinical assessment (International Cartilage Repair Society grade)

  Grade 0 Grade 1 Grade 2 Grade 3 Grade 4
Site A 11 (55) 12 (60) 6 (30) 0 (0) 4 (20)
Site B 16 (80) 8 (40) 5 (25) 0 (0) 3 (15)
Site C 0 (0) 0 (0) 1 (5) 13 (65) 20 (100)
Site D 1 (5) 11 (55) 10 (50) 1 (5) 3 (15)
Site E 17 (85) 7 (35) 1 (5) 0 (0) 1 (5)
Site F 0 (0) 0 (0) 3 (15) 15 (75) 18 (90)
Site G 0 (0) 2 (10) 11 (55) 10 (50) 19 (95)
  1. For International Cartilage Repair Society grades, see Introduction. For anatomical location of sites, see Figure 1.