Junichi Nakamura, Wakaba Fukushima, Wataru Ando, Shigeo Hagiwara, Yuya Kawarai, Yuki Shiko, Yohei Kawasaki, Takashi Sakai, Kazuya Ito, Yoshiya Arishima, Etsuo Chosa, Yusuke Fujimoto, Kazuo Fujiwara, Yukiharu Hasegawa, Shinya Hayashi, Takashi Imagama, Yutaka Inaba, Yasuyuki Ishibashi, Yasuhiro Ishidou, Hideya Ito, Hiroshi Ito, Juji Ito, Tetsuya Jinno, Tamon Kabata, Nobuhiro Kaku, Ayumi Kaneuji, Shunji Kishida, Seneki Kobayashi, Setsuro Komiya, Toshikazu Kubo, Tokifumi Majima, Naohiko Mashima, Masaaki Mawatari, Hidenobu Miki, Kazumasa Miyatake, Goro Motomura, Satoshi Nagoya, Hiroaki Nakamura, Yoshihide Nakamura, Ryosuke Nakanishi, Yasuharu Nakashima, Satoshi Nakasone, Takashi Nishii, Takayuki Nishiyama, Yoichi Ohta, Kenji Ohzono, Makoto Osaki, Kan Sasaki, Taisuke Seki, Takaaki Shishido, Takeshi Shoji, Akihiro Sudo, Michiaki Takagi, Daisuke Takahashi, Masaki Takao, Sakae Tanaka, Takeyuki Tanaka, Tomonori Tetsunaga, Keiichiro Ueshima, Kengo Yamamoto, Takuaki Yamamoto, Yuji Yamamoto, Takuma Yamasaki, Yuji Yasunaga, Nobuhiko Sugano
OBJECTIVES: This study documents the time elapsed from the diagnosis of osteonecrosis of the femoral head (ONFH) to surgery, exploring the factors that influence ONFH severity. DESIGN: Retrospective observational study of a nationwide database. SETTING: The Kaplan-Meier method with log-rank tests was applied to examine the period from definitive diagnosis of ONFH to surgery using any surgery as the end point. For bilateral cases, the date of the first surgery was the endpoint...
March 29, 2024: BMJ Open