Epidemiological study of osteonecrosis of the femoral head using the national registry of designated intractable diseases in Japan.
Ryuichi SatoWataru AndoWakaba FukushimaTakashi SakaiHidetoshi HamadaMasaki TakaoKazuya ItoNobuhiko SuganoPublished in: Modern rheumatology (2022)
The DID database data showed a similar distribution of gender and age to that in other nationwide surveys but lower incidence and prevalence of ONFH. Sampling bias may affect the epidemiological characteristics of ONFH.