Table 1 The clinical characteristics of the subjects.

From: Relationship of common variants in VEGFA gene with osteonecrosis of the femoral head: A Han Chinese population based association study

Characteristics

Subjects (N = 1,762)

P-value

Patients (N = 489)

Controls (N = 1,273)

Age (years), mean ± SD

50.5 ± 7.4

50.5 ± 8.5

0.8844

BMI (kg/m2), mean ± SD

24.8 ± 0.96

24.7 ± 0.99

0.1136

Smoking status (yes/no)

192/653

394/1357

0.9512

Classified by causes(%)

   Alcohol-induced

235 (48)

—

—

   Steroid-induced

254 (52)

—

—

  1. SD: standard deviation; BMI, body mass index. Student t tests were performed for Age and BMI between patients and controls group. χ2 was conducted for distribution of smoking status and patients and controls group.
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