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Table 1 Characteristics of patients with early-stage knee osteoarthritis

From: Association of medial meniscal extrusion with medial tibial osteophyte distance detected by T2 mapping MRI in patients with early-stage knee osteoarthritis

Characteristics

Data

Number of subjects

50

Age, years

57.0 (15.1)

BMI, kg/cm2

24.1 (3.9)

Sex, M/F

23/27

Radiography

 K/L grade 0/1/2

3/27/20

 Femorotibial angle, degrees

178.4 (2.6)

 Medial joint space width, mm

3.7 (0.9)

Proton density-weighted MRI (MTFJ)

 

 WORMS

  Cartilage (0–30)

11.9 (6.8)

  Osteophyte (0–35)

4.4 (5.1)

  Bone marrow lesion (0–15)

1.0 (1.9)

  Subchondral bone cyst (0–15)

2.5 (4.4)

  Subchondral bone attrition (0–15)

1.3 (1.5)

  Medial meniscus lesion (0–6)

2.2 (1.6)

 Medial meniscus

  MME, mm

3.0 (1.6)

  Tears, n

15

  Root tear, n

0

T2 mapping MRI (MTFJ)

 

 T2 value of medial meniscus

22.0 (2.8)

 Medial femoral osteophyte distance

  Bone part + cartilage part, mm

2.1 (1.4)

  Bone part, mm

1.3 (0.9)

  Cartilage part, mm

0.8 (0.8)

 Medial tibial osteophyte distance

  Bone part + cartilage part, mm

3.3 (1.9)

  Bone part, mm

1.8 (1.4)

  Cartilage part, mm

1.5 (1.5)

Osteophyte prevalence (MTFJ)

 

 Radiograph

40.0%

 Proton density-weighted MRI

48.0%

  K/L 0

0%

  K/L 1

44.4%

  K/L 2

60.0%

 T2 mapping MRI

98.0%

  K/L 0

100%

  K/L 1

96.7%

  K/L 2

100%

  1. Abbreviations: BMI Body mass index, K/L Kellgren-Lawrence classification, MFTJ Medial tibiofemoral joint, MME Medial meniscal extrusion, MRI Magnetic resonance imaging, WORMS Whole-Organ Magnetic Resonance Imaging Score
  2. The femorotibial angle and the medial joint space width of the knee joints were determined at the center point of the medial femorotibial compartment on a radiograph. Osteophytes observed by radiograph and MRI were defined as the presence of K/L grade ≤ 2 and the presence of WORMS grade ≤ 2, respectively. The data are expressed as mean (SD), count, or percent