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

Table 1 Characteristics of the participants

Variables	Cases (n = 199)	Controls (n = 200)	p value
Sex N			0.966^b
Male	115	116
Female	84	84
Age, years (mean ± SD)	41.15 ± 12.934	41.20 ± 8.662	0.961^a
Clinical stages
Stage II	47
Stage III	94
Stage IV	58
Hip lesions
unilateral	59
bilateral	140
TC (mmol/L)	4.50 ± 0.923	4.54 ± 0.814	0.703
TG (mmol/L)	1.84 ± 1.455	1.76 ± 1.076	0.569
HDL-C (mmol/L)	1.07 ± 0.269	1.15 ± 0.214	0.000^a
LDL-C (mmol/L)	2.64 ± 0.765	2.56 ± 0.728	0.285
TC/HDL-C	4.41 ± 1.178	4.04 ± 0.856	0.000^a
TG/HDL-C	1.94 ± 1.930	1.64 ± 1.149	0.059
LDL-C/HDL-C	2.58 ± 0.821	2.30 ± 0.767	0.001^a

TC total cholesterol, TG triglycerides, LDL-C low-density lipoprotein cholesterol, LDL-C high-density lipoprotein cholesterol
^ap value was calculated by independent samples t test
^bp value was calculated by chi-squared test
p < 0.05 indicates statistical significance

ISSN: 1749-799X