Arakawa, Satoshi http://orcid.org/0000-0003-4948-0239
Kato, Hiroyuki
Asano, Yukio
Horiguchi, Akihiko
Yamamoto, Masakazu
Miura, Fumihiko
Okamoto, Kohji
Kimura, Yasutoshi
Sakaguchi, Takanori
Yoshida, Masahiro
Article History
Received: 6 January 2022
Accepted: 22 February 2022
First Online: 13 June 2022
Declarations
:
: We have no conflicts of interest to declare in relation to this article.
: The study protocol was approved by the institutional review board of Fujita Health University (approval no. HM19-381). Signed informed consent was not required, as this was a retrospective study with de-identified data. Details of the study were published on the institutional website, and the patients were guaranteed the right to decline participation in the study. It conforms to the provisions of the Declaration of Helsinki established in 1995 (as revised in Brazil in 2013). A total of 55 hospitals in Japan participated in this study, and patients who underwent surgical appendectomy in 2017 were registered.