Tanaka Sayo, Shimizu Keiki, Gilmour Stuart
Graduate School of Public Health, St. Luke's International University, 3-6-2 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
Department of Orthopedic Surgery, Ibaraki Welfare and Medical Center, 1872-1 Motoyoshida-cho, Mito-shi, Ibaraki 310-0836, Japan.
Int J Environ Res Public Health. 2025 Feb 21;22(3):322. doi: 10.3390/ijerph22030322.
Japan has the most ageing population in the world with a high population of bicycle users, and the percentage of older cyclists continues to grow as the population ages. At the same time, the proportion of bicycle-related collisions is increasing. The aim of this study is to analyse trends and risk factors for bicycle injuries and deaths in Japan in order to suggest preventive measures, using data from vital statistics and the National Police Agency to calculate incidence rate ratios (IRR), age-standardised mortality rates, and annual percent changes, by ten-year-interval age groups. Data from the Japan Trauma Data Bank was analysed for demographic information about injuries. The risk of casualties was high in the younger generation and lower in the older population. However, the risk of mortality increased rapidly with age, with people over 70 years old facing more than 10 times the risk of younger age groups (IRR = 12.62). Casualty and mortality rates were declining in all age groups until the year 2020 (range: -9.77% to -4.95%, -8.61% to -1.07%, respectively). However, lethality of bicycle collisions showed no significant reduction. Current methods have not been effective in reducing bicycle-related lethality in Japan, especially for the older population, and should be improved to ensure that bicycle transportation is safe for all road users.
日本拥有世界上老龄化程度最高的人口，自行车使用者数量众多，且随着人口老龄化，老年骑自行车者的比例持续增长。与此同时，与自行车相关的碰撞事故比例也在上升。本研究的目的是分析日本自行车伤害和死亡的趋势及风险因素，以便提出预防措施，利用人口动态统计数据和国家警察厅的数据，按十年间隔年龄组计算发病率比值（IRR）、年龄标准化死亡率和年度百分比变化。对日本创伤数据库的数据进行了分析，以获取有关伤害的人口统计学信息。年轻一代伤亡风险较高，老年人口伤亡风险较低。然而，死亡率风险随年龄迅速增加，70岁以上人群面临的风险是年轻年龄组的10倍以上（IRR = 12.62）。到2020年，所有年龄组的伤亡率和死亡率都在下降（范围分别为-9.77%至-4.95%，-8.61%至-1.07%）。然而，自行车碰撞的致死率没有显著下降。目前的方法在降低日本与自行车相关的致死率方面并不有效，尤其是对老年人口，应加以改进，以确保自行车交通对所有道路使用者都是安全的。
