2017 ISAKOS Biennial Congress ePoster #2410

 

Time-Loss Injuries At The World Karate Championships: A Prospective Study

Rafael Arriaza-Loureda, MD, PhD, Perillo, Oleiros, La Coruña SPAIN
Dusana Cierna, PhD, Bratislava SLOVAKIA
Carlos Agrasar-Cruz, MD, PhD, La Coruña SPAIN
Miguel Garcia-Saavedra, PhD, A Coruña SPAIN
Dave Inman, BSc (Hons) Osteopathy, Bath UNITED KINGDOM
Emilio Lopez-Vidriero, MD, PhD, Seville, Andalusia SPAIN
Mercé Barrientos, PhD Student, A Coruña SPAIN
Patricia Regueiro, PhD Student, A Coruña SPAIN

Instituto Médico Arriaza y Asociados. HM Chair of Sports Traumatology University of A Coruña, A Coruña, SPAIN

FDA Status Not Applicable

Summary

Time-loss injuries at the World Karate Championships were propestively studied in a total of 3412 fights. The incidence of time-loss injuries is low, (7.18 injuries per 1000 athlete exposures), and there is a statistically significant difference betwwen male and female athletes injuries ( with an odds ratio of 0,33 (p = 0,002, 95% CI 0,16-0,66).

Abstract

The study focuses in the 3 consecutive World Karate Championships (WKC) celebrated in 2010 (Beograd, Serbia), 2012 (Paris, France), 2014 (Bremen, Germany). All the injuries that took place during the four analysed championships in the individual’s categories and teams categories were recorded prospectively following the same procedure used in previous estudies. Time-loss injuries were specifically analyzed.
The injury incidence rates were calculated both per 1,000 athlete exposures (AEs) and per 100 exposure-minutes using standard methods (Number of injuries ÷ Number of athlete-exposures [AEs]) x 1000 = Number of injuries per 1000 AEs). One AE refers to 1 individual participating in a bout where he or she is exposed to the possibility of being injured, which means that for each bout, there are 2 AEs registered. Each bout in male category lasted 3 minutes and female category lasted 2 minutes and the clock was stopped every time that the bout was called to a halt by the referees.
Statistical analysis was conducted to identify risk factors for the presence or absence of injury, including gender, category and championship. All data were analysed in statistical software IBM SPSS (version 21 for Windows). The phi and the Cramer V correlations were used to assess the significance of each predictor; odds ratios (ORs) were computed for each risk factor and 95% confidence intervals (CIs) were constructed. A p value less 0.05 was considered as statistically significant.
A total of 3412 fights in the individual category (1109 in the male category and 831 in the female category) and in the team category (957 in the male category and 831 in the female category) were analysed in this study.

Results

During the 3 world championships a total of 49 time-loss injuries were recorded, with an incidence of 7.18 injuries per 1000 athlete exposures (95% CI 5,17-9,19). There was a significant difference in total time-loss injury rate between the male and the female category with an odds ratio of 0,33 (p = 0,002, 95% CI 0,16-0,66). There was not a significant difference in total time-loss injury rate between the individual (weight categories) and the team categories (without weight limits) with an odds ratio of 0,62 (p = 0,11, 95% CI 0,34-1,12).
The most common types of injury were fractures: 18 (37%), followed by dislocations: 8 (16%), and lacerations: 7 (14%), while the most commonly injured anatomical regions were the head, face and neck (43%) followed by upper extremities (37%) and lower extremities (20%).

Table 1 shows the time-loss injuries sustained during the three consecutive karate world championships studied (N = 3412 fights, 6824 athletes exposures, 95% CI))
Type of injury number of injuries % per 1000 AEs
Fractures 18 37 2,64
Luxations 8 16 1,17
Lacerations 7 14 1,03
Ruptures of ligaments 6 12 0,88
Sprains 4 8 0,59
Contusions 3 6 0,44
Concusions 3 6 0,44