TY  - JOUR
PY  - 2022//
TI  - Head injury assessment in the elite level rugby union in Japan: review of 3 seasons
JO  - International journal of sports medicine
A1  - Tajima, Takuya
A1  - Ota, Osamu
A1  - Nagayama, Masataka
A1  - Takahashi, Masayasu
A1  - Yamada, Mutsuo
A1  - Ishiyama, Nobuo
A1  - Yoshida, Ichiro
A1  - Takemura, Masahiro
A1  - Hara, Kenji
A1  - Akama, Takao
A1  - Mitsumori, Norio
A1  - Higashihara, Junichiro
A1  - Toyama, Yukimasa
A1  - Furuya, Masahiro
A1  - Chosa, Etsuo
A1  - Nakamura, Akihiko
SP  - ePub
EP  - ePub
VL  - ePub
IS  - ePub
N2  - Head Injury Assessment (HIA) is the screening tool for head injury during a rugby game. The purpose of this study was to investigate the epidemiology of HIA in the Japan Rugby Top League (JRTL). The incidences of HIA, defined concussion (per 1,000 player-hours) and repeated concussions were evaluated in three seasons (2016-17, 2017-18, 2018-19; total 360 games). The HIA incidence rates were 12.7 (95% confidence interval 9.5-15.9), 20.8 (16.8-24.9), and 25.0 (20.5-29.5) in each season. HIA-1 criteria 2, which is applied for suspected concussion cases, was performed for 46 cases in the 2016-17 season, 81 cases in the 2017-18 season, and 88 cases in the 2018-19 season. The concussion incidence rates were significantly greater in the 2017-18 season (9.6/1000 player-hours, 95% confidence interval 6.8-12.4) and the 2018-19 season (14.4, 11-17.8) compared to the 2016-17 season (4.8, 2.8-6.8). The number of repeated concussion cases in the same season was 1 in the 2016-17 season and 4 in both the 2017-18 and 2018-19 seasons. This study confirmed significantly higher HIA and concussion incidence rates over time. Although the HIA system might have been established in the three seasons in JRTL, comprehensive management needs to be improved to prevent repeated concussions.<p />  <p>Language: en</p>
LA  - en
SN  - 0172-4622
UR  - http://dx.doi.org/10.1055/a-1810-6509
ID  - ref1
ER  -