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Trends in hip preservation surgery in Japan from 2014 to 2019 with a focus on hip arthroscopic surgery
Kensuke Fukushima1, Yuka Ogata1, Yoshihisa Ohashi1
1Department of Orthopaedic Surgery, School of Medicine, Kitasato University, 1-15-1, Kitasato, Minami-Ku, Sagamihara City, Kanagawa 252-0374, Japan.
Insights
Hip preservation surgeries in Japan decreased overall, but hip arthroscopic procedures saw a 1.54-fold increase by 2019. Pelvic osteotomy remains more common than hip arthroscopy, despite its development in Japan.
Area of Science:
- Orthopedic Surgery
- Sports Medicine
- Public Health Data Analysis
Background:
- Hip dysplasia is a common cause of secondary hip osteoarthritis in Japan.
- Understanding trends in hip preservation surgery is crucial for managing this condition.
Purpose of the Study:
- To investigate the volume and trends of hip preservation surgeries in Japan from 2014 to 2019.
- To specifically analyze trends in hip arthroscopic surgery by age and sex.
Main Methods:
- Utilized the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) for data.
- Extracted and analyzed data on hip preservation surgeries, including pelvic osteotomy and hip arthroscopy.
- Calculated incidence rates per year for 10-year age groups and by sex.
Main Results:
- A total of 14,891 hip preservation surgeries were performed between 2014 and 2019.
- Pelvic osteotomy was the most frequent procedure; however, hip arthroscopic procedures increased 1.54-fold by 2019.
- The 40-49 age group showed the highest incidence of hip arthroscopic surgery, with no significant sex difference.
Conclusions:
- While overall hip preservation surgery incidence declined, hip arthroscopy showed a notable increase.
- Pelvic osteotomy remains more prevalent than hip arthroscopic surgery in Japan.
- Despite originating in Japan, the use of hip arthroscopic surgery has plateaued since 2017.
Abstract:
Secondary hip osteoarthritis due to hip dysplasia is common among Japanese populations. This study aimed to investigate the number of hip preservation surgeries performed in Japan and assess trends, by age and sex, from 2014 to 2019, focusing on hip arthroscopic surgery, based on the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB). We downloaded the files 'Number of calculations by division, sex, and age group' under 'operation (code K)' from 2014 to 2019 from the NDB Open Data Japan database. Data on hip preservation surgeries were extracted, including the number for each surgical procedure and its incidence per year, calculated as the number of surgeries performed for each 10-year age group and by sex, regarding hip arthroscopic surgery. Overall, 14 891 hip preservation surgeries were performed in Japan over the study period, with pelvic osteotomy being the most common procedure. Although the incidence of hip preservation surgeries decreased from 2014 to 2019, there was a specific 1.54-fold higher incidence in hip arthroscopic procedures in 2019 compared to 2014. Hip arthroscopic labral repair was performed more frequently than synovectomy. The highest incidence of hip arthroscopic surgery was in the 40- to 49-years age group, with no difference in incidence between sexes (P = 0.951). In Japan, pelvic osteotomy was performed more often as a hip preservation surgery than hip arthroscopic surgery. Although hip arthroscopic surgery was developed in Japan, its use has not increased from 2017 to 2019.
