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Serum exosome levels in the different stages of steroid-induced osteonecrosis of the femoral head (ONFH)
| Stage I/II (n = 25) | Stage III/IV (n = 30) | Stage V/VI (n = 30) | |
|---|---|---|---|
| Exosome level (13/mL) | 7.2 (sd 2.1) | 7.3 (sd 1.9) | 7.3 (sd 2.0) |
Patients were classified with the Steinberg staging system of ONFH.12
