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Table 1 Demographic characteristics of the intra-/juxta-articular osteoid osteoma and extra-articular osteoid osteoma

From: Clinical and radiological features and skeletal sequelae in childhood intra-/juxta-articular versus extra-articular osteoid osteoma

Variables Intra-/juxta-articular (n = 11) Extra-articular (n = 23) p-value
Sex (F : M) 6 : 5 16 : 7 0.459*
Age at diagnosis (yr) 10.4 (4.1 to 14.8) 10.4 (4.3 to 15.9) 0.740**
Follow-up period (yr) 4.7 (2.0 to 8.1) 5.0 (2.4 to 11.8) 0.619**
Treatment method RFA 5 11  
Resection 3 7 1.000*
NSAIDs 3 5  
Diagnostic study Plain radiography 11 23  
CT 9 12
MRI 10 5
Bone scan 2 8
  1. RFA, radiofrequency ablation; NSAIDs, non-steroidal anti-inflammatory drugs. Data presented as number of patients for sex, diagnostic study and treatment methods, and data presented as median (range) for age at diagnosis and follow-up period. *Fisher’s exact test, **Mann–Whitney test.