Received: 10 June 2019
Accepted: 4 May 2020
First Online: 11 May 2020
Ethics approval and consent to participate
: This study, approved by the medical ethics committee of Hirosaki University (2015–260, 2nd April, 2015) and National Hospital Organization Morioka Hospital (Morioka Hospital) (2015–10, 1st February, 2015), included patients with acute hip pain who visited the emergency outpatient unit at Morioka Hospital, which provides primary care in the area, from April 2016 to March 2017. We opted out of the study and obtained verbal informed consent from all patients under the approval of the ethics committees.
: The participants gave their consent to participate in the study and were informed that any publications based on the data would not include identifying information.
: The authors declare that they have no competing interests.