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From: RETRACTED ARTICLE: High failure rate after Beta-tricalcium phosphate grafting for the treatment of femoral head osteonecrosis: a retrospective analysis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