Economic burden of influenza illness among children under 5 years in Suzhou,China: Report from the cost surveys during 2011/12 to 2016/17 influenza seasons |
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Authors: | Yin Wang Liling Chen Fangfang Cheng Matthew Biggerstaff Sujian Situ Suizan Zhou Junmei Gao Changpeng Liu Jun Zhang Alexander J Millman Tao Zhang Jianmei Tian Genming Zhao |
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Institution: | 1. Department of Epidemiology, School of Public Health, Fudan University, Key Laboratory of Public Health Safety, Ministry of Education, Shanghai, China;2. Suzhou Center for Disease Prevention and Control, Suzhou, China;3. Children''s Hospital of Soochow University, Suzhou, China;4. Centers for Disease Control and Prevention, Influenza Division, Atlanta, GA, USA;5. Centers for Disease Control and Prevention, Center of Global Health, Atlanta, GA, USA;6. Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China |
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Abstract: | BackgroundData are limited on the economic burden of seasonal influenza in China. We estimated the cost due to influenza illness among children < 5-year-old in Suzhou, China.MethodsThis study adopted a societal perspective to estimate direct medical cost, direct non-medical cost, and indirect cost related to lost productivity. Data to calculate costs and rates of three influenza illness outcomes (non-medically attended, outpatient and hospitalization) were collected from prospective community-based cohort studies and hospital-based enhanced laboratory-confirmed influenza surveillance in Suzhou during the 2011/12 to 2016/17 influenza seasons. We used mean cost-per-episode, annual incidence rates of episodes of each outcome, and annual population size to estimate the total annual economic burden of influenza illnesses among children < 5-year-old for Suzhou. All costs were reported in 2017 U.S. dollars.ResultsThe mean cost-per-episode (standard deviation) was $9.92 (13.26) for non-medically attended influenza, $161.05 (176.98) for influenza outpatient illnesses, and $1425.95 (603.59) for influenza hospitalizations. By applying the annual incidence rates to the population size, we estimated an annual total of 4,919 episodes of non-medically attended influenza, 21,994 influenza outpatient, and 2,633 influenza hospitalization. Total annual economic burden of influenza to society among children < 5-year-old in Suzhou was $7.37 (95% confidence interval, 6.9–7.8) million, with estimated costs for non-medically attended influenza of $49,000 (46,000–52,000), influenza outpatients $3.5 (3.3–3.8) million, and influenza hospitalizations $3.8 (3.6–3.9) million. Among outpatients, the indirect cost was 36.3% ($1.3 million) of total economic burden, accounting for 21,994 days of lost productivity annually. Among inpatients, the indirect cost was 22.1% ($829,000), accounting for 18,431 days of lost productivity annually.ConclusionsOur findings show that influenza in children < 5-year-oldcauses substantial societal economic burden in Suzhou, China. Assessing the potential economic benefit of increasing influenza vaccination coverage in this population is warranted. |
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Keywords: | Influenza Children Economic burden China Direct cost Indirect cost |
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