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Table 1 Participant characteristics at baseline in cross-sectional and longitudinal study

From: Association of subchondral bone marrow lesion localization with weight-bearing pain in people with knee osteoarthritis: data from the Osteoarthritis Initiative

  Cross-sectional study Longitudinal study
Included participants 1412 582
Male (%) 38.9 42.8
Age (years) 61.7 (8.8) 61.4 (8.8)
BMI (kg/m2) 29.6 (4.9) 30.7 (4.8)
Total BML score, 0–45 4.2 (3.7) 3.7 (2.8)
BML score at medial FT joint, 0–15 1.2 (2.0) 1.2 (1.7)
BML score at lateral FT joint, 0–15 0.6 (1.4) 0.2 (0.6)
BML score at medial PF joint, 0–6 0.8 (1.0) 0.8 (1.0)
BML score at lateral PF joint, 0–6 0.9 (1.2) 1.1 (1.5)
BML score at subspinous region, 0–3 0.5 (0.8) 0.4 (0.7)
Articular cartilage score, 0–42 9.0 (5.6) 9.0 (4.7)
Osteophyte score, 0–32 8.8 (6.5) 8.7 (6.4)
Hoffa’s synovitis score, 0–3 0.7 (0.7) 0.7 (0.7)
Effusion-synovitis score, 0–3 0.8 (0.9) 0.8 (0.8)
Medial meniscus extrusion score, 0–3 0.9 (1.0) 1.1 (1.0)
Anterior cruciate ligament tears (%) 9.4 6.2
FTA (degree) 185.9 (2.6) 186.1 (2.0)
KL grade (0/1/2/3/4) (%) 14.0/20.0/32.3/25.3/8.5 0/12.7/51.0/36.3/0
Weight-bearing pain, 0–15 2.3 (2.4) 1.7 (2.1)
Non-weight-bearing pain, 0–10 0.9 (1.5) 0.7 (1.3)
  1. Data of at baseline in cross-sectional and longitudinal study are displayed as mean (SD)
  2. BMI body mass index, BML bone marrow lesion, FTA femorotibial angle, FT femorotibial, PF patellofemoral, KL Kellgren-Lawrence grade