Injury-related mortality among children younger than 5 years in China during 2009-2016: an analysis from national surveillance system

摘要

Background Epidemiology in injury-related mortality among children younger than 5 years was unreported in China recently. Methods Data were obtained from China’s Under 5 Child Mortality Surveillance System (U5CMSS) in 20092016. Injury-related mortality rates were calculated by residence, age-group, gender and major injury type (drowning, traffic injuries, suffocation, poisoning, falls). The average annual decline rate (AADR) was calculated based on the annual mortality rates by Poisson regression and the relative risk (RR) between urban and rural residence was examined based on the rates of two years for each time point by Cochran-Mantel-Haenszel method. Results U5CMSS contained 6503 injury-related deaths of children younger than 5 years during the study period, of which 58.6% were male, 86.0% occurred in rural areas, 65.7% were children aged 12-59 months. Deaths were mainly attributed to suffocation (34.3%), drowning (29.6%), traffic injuries (17.7%), falls (7.2%) or poisoning (4.7%). The injury-related mortality rate dropped from 274.7 to 189.2 per 100 000 live births from 2009 to 2016, giving an AADR of 4.53% (95% CI 3.50% to 5.55%). During 2009-2016, the injury-related mortality rate in rural area was higher than that in urban area, the adjusted RRs (aRRs) in infants and children aged 12-59 months were 3.32-6.04 and 4.31-5.49, respectively. Conclusion The rate of injury-related deaths in children younger than 5 years has decreased in China, but it remains high and strong urban-rural disparities still exist. Public health programmes and policy interventions should focus particularly on suffocation among infants and on drowning and traffic injuries among children aged 12-59 months, especially in rural areas.