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Table 5 Severity of knee abnormalities in subjects stratified by age group. Severity presented as median (interquartile range) for subjects with any abnormality, i.e. WORMS score ≥ 1, for each feature. P-values are from Mann-Whitney U tests of scores from all subjects in each age group

From: MRI findings of knee abnormalities in adolescent and adult volleyball players

  Baseline Follow-up
  Adolescents (n = 18) Adults (n = 18)   Adolescents (n = 18) Adults (n = 18)  
  n Severity n Severity p-value n Severity n Severity p-value
Cartilage abnormalities 0 12 3 (2.5, 5) 0 13 3 (3, 5)
Bone marrow lesions 4 1 (1, 3) 8 2 (1, 2) 0.107 3 1 (1, 1.5) 11 2 (1, 2.5) 0.005
Subarticular cysts 2 1 (1, 1) 5 2 (1, 2) 0.169 2 1 (1, 1) 5 2 (1, 2) 0.169
Osteophytes 16 1 (1, 2) 18 3 (2, 5) <0.001 16 2 (1, 2) 18 2.5 (2, 5) <0.001
Ligamentous lesions 0 2 1 (1, 1) 0.151 0 2 1 (1, 1) 0.151
Meniscal lesions 5 1 (1, 1) 10 2 (2, 3) 0.021 5 1 (1, 1.3) 11 2 (2, 3.5) 0.015
  1. P-values presented in bold capture demonstrate significance (p < 0.05)