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Table 1 Characteristics of participants at baseline

From: MRI-detected osteophytes of the knee: natural history and structural correlates of change

  Stable or decreased OPs Increased OPs p
N = 222 N = 191
Age (years) 62.2 ± 7.3 62.9 ± 7.0 0.30
Female (%) 53 47 0.22
BMI (kg/m2) 26.9 ± 3.9 28.5 ± 4.9 < 0.01
Baseline total cartilage defect score (0–4) 1.48 ± 0.73 2.13 ± 1.03 < 0.01
Baseline total BML score (0–3) 0.33 ± 0.56 0.59 ± 0.78 < 0.01
Baseline total tibial CV (ml) 5.11 ± 1.22 5.08 ± 1.13 0.80
Baseline meniscal extrusion score (0–2) 0.13 ± 0.36 0.27 ± 0.51 < 0.01
Total effusion-synovitis score (0–3) 1.90 ± 0.67 2.08 ± 0.81 0.01
Suprapatellar effusion-synovitis score (0–3) 1.53 ± 0.64 1.76 ± 0.84 0.01
Central portion effusion-synovitis score (0–3) 1.56 ± 0.71 1.65 ± 0.77 0.19
Posterior femoral recess effusion-synovitis score (0–3) 0.66 ± 0.79 0.76 ± 0.78 0.14
Subpopliteal recess effusion-synovitis score (0–3) 0.60 ± 0.79 0.78 ± 0.94 0.04
IPFP area (cm2) 7.6 ± 1.2 7.7 ± 1.3 0.18
Presence of IPFP abnormality (%) 75% 82% 0.10
IPFP quality score (0–6) 1.45 ± 1.21 2.12 ± 1.64 < 0.01
Baseline total OP score (0–36) 2.80 ± 3.45 7.62 ± 7.70 < 0.01
  1. The two-tailed t test was used to examine differences between means, and the χ2 test was used for proportions (percentages). Significant differences are shown in bold. Mean ± SD except for percentages
  2. BMI body mass index, BM: bone marrow lesion, OP osteophyte, CV cartilage volume, IPFP infrapatellar fat pad