Table 2 Rate of change for subjects completing follow-up, over the total, first and second time periods
From: Knee cartilage loss in symptomatic knee osteoarthritis over 4.5 years
Parameter | 4.5 yearsa | First period: 0–2 yearsa | Second period: 2–5 yearsa | Difference (95% CI) |
|---|---|---|---|---|
Annual rate of cartilage loss, mm3/year | ||||
   Total | 135 (135) | 143 (247) | 125 (144) | 18 (- 46 to 81) |
   Medial | 63 (78) | 69 (149) | 56 (85) | 12 (- 28 to 52) |
   Lateral | 72 (73) | 75 (140) | 69 (77) | 6 (- 31 to 42) |
Annual percentage cartilage loss | ||||
   Total | 3.94 (3.68) | 4.04 (7.25) | 4.11 (4.39) | - 0.07 (- 1.91 to 1.76) |
   Medial | 3.74 (4.72) | 3.87 (9.49) | 3.77 (5.88) | 0.10 (- 2.44 to 2.64) |
   Lateral | 4.42 (4.65) | 4.60 (9.10) | 4.80 (5.60) | - 0.20 (- 2.40 to 1.99) |