3.1 Demographic characteristics
A total of 1292 patients (233 females and 1059 males) and 1880 controls (350 females and 1530 males) were enrolled in the study. The average age of the patients was 43.09 ± 11.51 years aged and 48.33 ± 10.66 years elderly in the control group. There was no difference in gender (p> 0.05) between the patients and the control group, as shown in Figure. 1.
3.2 Analysis of blood biochemical indexes in case group and control
Group
Five biochemical indexes (TC; TG; HDL; LDL; PLT) were selected to compare the differences between the osteonecrosis group and the control group, as shown in Table 1. In the overall sample, TC (p = 0.00004), LDL (p = 0.014) and PLT (p = 0.000005) levels were statistically significant between the two groups In men, TC (p= 0.004), LDL (p= 0.011) and PLT (p= 0.00005) levels were statistically significant between the two groups In women, TC (p= 0.001) and PLT (p= 0.048) levels were statistically significant between the two groups. There were differences in TC (p= 0.00001) and PLT (p= 0.031) levels between the case group, and the control group in the samples aged < 45 years. There were differences in LDL (p= 0.00002) and PLT (p= 0.022) levels between the two groups in the samples aged > 45 years. Compared with the control group, the levels of TC, LDL and PLT were significantly different. In patients with avascular necrosis of the femoral head, the levels of TC decreased, while the levels of LDL and PLT increased. (Table 1)
3.3 Analysis of blood biochemical indexes in patients with ONFH
We stratified the osteonecrosis samples (gender, age, hip lesions, course of disease, and osteonecrosis stage). Eleven clinical biochemical indexes, including TC; TG; HDL; LDL; ApoA1; ApoB; PT; APTT; ESR; CRP; PLT was selected for analysis in each layer, as shown in Table 2. The levels of TG, HDL, LDL, ApoA1, ApoB, APTT, ESR and PLT were different between male and female. The levels of TG, LDL, ApoB, APTT and PLT in male were much taller than that in female, while HDL, ApoA1 and ESR were taller in female than in mail. TC; TG; HDL; LDL; ApoA1; ApoB; APTT; ESR; CRP and PLT were statistically significant in different age groups. The older the age of onset, the lower the level of TC; HDL; LDL; ApoA1; ApoB; PLT. However, with the extension of the onset time, the level of PLT in patients decreased continuously. Through the study of unilateral and bilateral osteonecrosis, there were differences in HDL and ApoA1 levels. The levels of LDL, ApoA1, apoB and APTT were significantly unlike in distinctive stages of osteonecrosis. (Table 2)
We further compared the stages of osteonecrosis with the levels of APTT and found that the levels of APTT were unusual in unusual stages, as shown in Table 3. In the study of hip lesions, we found that CRP;ApoB;ApoA1;HDL levels were statistically significant, as shown in Table 4. The levels of CRP and PLT were also different in the different course of disease, as shown in Table 5.
3.4 Biochemical analysis between alcohol-induced ONFH group and control group
The difference analysis of indexes between the alcohol-induced ONFH group and the control group is shown in Table 6. Compared with the control group, the levels of HDL (p= 0.002), LDL (p= 0.000) and PLT (p= 0.000) were significantly different in patients with alcohol-induced ONFH There were significant differences in HDL (p= 0.005) and PLT (p= 0.045) levels between the two groups. LDL (p= 0.000) levels were different between the two groups. (Table 6)
3.5 Analysis of blood biochemical indexes in patients with alcohol-induced ONFH
The levels of TC, HDL, LDL, ApoB, ESR and PLT were different among different age groups. The older the onset age, the higher the levels of TC, HDL, LDL and ESR, the lower the level of PLT. In the study of biochemical indexes among distinctive courses of disease, it was found that the levels of ESR and PLT were significantly distinct among different courses. There were significant differences in the levels of ApoA1; ESR; CRP and PLT between unilateral and bilateral osteonecrosis. There were different stages of osteonecrosis, TG, LDL and ApoA1 levels. (Table 7)
3.6 Analysis of blood biochemical indexes in patients with steroid-induced ONFH
There were differences in HDL; ApoA1; APTT and ESR levels between male and female patients with ONFH. The level of APTT in male was much taller than that in female, HDL; ApoA1 and ESR were taller in female than in mail. TC; HDL; LDL; ApoA1; ApoB; APTT and ESR were statistically significant in different age groups. The older the age of onset, the lower the level of TC; HDL; LDL; ApoA1; ApoB. Through the study of unilateral and bilateral osteonecrosis, it was found that the levels of TG, HDL, LDL and ApoA1 were different. (Table 8)