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Table 1 Characteristics of the participants

From: Variants in RETN gene are associated with steroid-induced osteonecrosis of the femoral head risk among Han Chinese people

VariablesCases (n = 199)Controls (n = 200)p value
Sex N  0.966b
 Male115116 
 Female8484 
Age, years (mean ± SD)41.15 ± 12.93441.20 ± 8.6620.961a
Clinical stages
 Stage II47  
 Stage III94  
 Stage IV58  
Hip lesions
 unilateral59  
 bilateral140  
TC (mmol/L)4.50 ± 0.9234.54 ± 0.8140.703
TG (mmol/L)1.84 ± 1.4551.76 ± 1.0760.569
HDL-C (mmol/L)1.07 ± 0.2691.15 ± 0.2140.000a
LDL-C (mmol/L)2.64 ± 0.7652.56 ± 0.7280.285
TC/HDL-C4.41 ± 1.1784.04 ± 0.8560.000a
TG/HDL-C1.94 ± 1.9301.64 ± 1.1490.059
LDL-C/HDL-C2.58 ± 0.8212.30 ± 0.7670.001a
  1. TC total cholesterol, TG triglycerides, LDL-C low-density lipoprotein cholesterol, LDL-C high-density lipoprotein cholesterol
  2. ap value was calculated by independent samples t test
  3. bp value was calculated by chi-squared test
  4. p < 0.05 indicates statistical significance