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Objective  This study aimed to examine trends in the incidence and outcomes of bicycle-related injuries in emergency departments (ED) in South Korea.    Methods  We analysed data from the National Emergency Department Information System database for adult patients (≥20 years) with bicycle-related injuries presenting to EDs in South Korea between January 2012 and December 2014. Riders and bicycle passengers whose injuries were associated with bicycle use were included. Serious outcomes were defined as death at the ED, need for emergency operation, or intensive care unit admission.    Results  The number of people who commute to work by bicycle increased by 36% from 205,100 in 2005 to 279,544 in 2015. Of 529,278 traffic-related trauma cases, 58,352 (11.0%) were bicycle-related, which increased from 7,894 (10.2%) in the first half of 2012 to 12,882 (12.2%) in the second half of 2014 (p < 0.001). However, the proportion of serious outcomes decreased from 5.0% to 4.2% during the study period (p < 0.001). Serious outcomes were most frequent in the elderly (65–74 years) and older elderly (≥75 years) groups and decreased for all but the elderly age group from 10.3% to 9.8% (p = 0.204). The helmet use rate increased from 14.2% to 20.3% (p < 0.001) but was the lowest in the older elderly group (3.6%) without change during the study period (from 4.7% to 3.7%, p = 0.656). A lack of helmet use was significantly associated with serious outcomes (odds ratio, 1.811; 95% confidence interval, 1.576–2.082).    Conclusions  Although the incidence of bicycle-related injuries increased, the proportion of serious outcomes decreased, possibly due to increased helmet use. Public education on safety equipment use is required, especially in elderly populations.

plos one

Trends in the incidence and outcomes of bicycle-related injury in the emergency department: A nationwide population-based study in South Korea, 2012-2014