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. 2020 Jul 15;15:264. doi: 10.1186/s13018-020-01786-4

Table 2.

VAS scores before and after the operation

Preoperative 6 months after the operation End of follow-up
Stage
 Phase I 5.0 ± 0.8 2.0 ± 0.8** 0.4 ± 0.5**
 Phase II 5.1 ± 0.7 2.8 ± 0.8** 5.1 ± 2.9
Pathogeny
 AFHN 4.8 ± 0.8 1.8 ± 0.8** 0.2 ± 0.4**
 SIFHN 5.25 ± 0.9 3.25 ± 0.9** 7.25 ± 0.9**
 IFHN 5.1 ± 0.7 2.4 ± 0.5** 2.7 ± 2.6*
Total 5.1 ± 0.8 2.4 ± 0.9** 3.1 ± 3.2*

AFHN alcoholic femoral head necrosis, SIFHN steroid-induced femoral head necrosis, IFHN idiopathic femoral head necrosis

*P < 0.05; **P < 0.01