Table 1 Participant characteristics at baseline in cross-sectional and 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)