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Table 1 Characteristics of ONFH patients and controls

From: Significant associations of PAI-1 genetic polymorphisms with osteonecrosis of the femoral head

  Controls Patients
  (n = 251) Total
(n = 206)
Idiopathic
(n = 98)
Alcohol-induced
(n = 72)
Steroid-induced
(n = 36)
Age (year)a 47.8 ± 12.6 44.2 ± 11.6 44.9 ± 12.3 45.7 ± 10.2 39.3 ± 10.9
Sex (M/F) 193/58 159/47 78/20 62/10 19/17
BMI (kg/m2)a 23.6 ± 3.5 24.2 ± 3.3 24.4 ± 3.6 24.1 ± 2.9 24.4 ± 3.3
  1. aMean ± SEM