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Table 1 Demographic characteristics of patients with NONFH

From: RETRACTED ARTICLE: High failure rate after Beta-tricalcium phosphate grafting for the treatment of femoral head osteonecrosis: a retrospective analysis

Total patient number 47 hips (33 patients)
Mean age at surgery 36 years (23–49 years)
Gender ratio Male/Female = 27/6
Involved hip Unilateral/Bilateral = 19/14
Risk factors
 Corticosteroid 19 patients (26 hips)
 Alcoholism 11 patients (17 hips)
 Idiopathic 3 patients (4 hips)