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Cost-effectiveness of inactivated seasonal influenza vaccination in a cohort of Thai children ≤60 months of age

Author

Listed:
  • Wanitchaya Kittikraisak
  • Piyarat Suntarattiwong
  • Darunee Ditsungnoen
  • Sarah E Pallas
  • Taiwo O Abimbola
  • Chonticha Klungthong
  • Stefan Fernandez
  • Suchada Srisarang
  • Tawee Chotpitayasunondh
  • Fatimah S Dawood
  • Sonja J Olsen
  • Kim A Lindblade

Abstract

Background: Vaccination is the best measure to prevent influenza. We conducted a cost-effectiveness evaluation of trivalent inactivated seasonal influenza vaccination, compared to no vaccination, in children ≤60 months of age participating in a prospective cohort study in Bangkok, Thailand. Methods: A static decision tree model was constructed to simulate the population of children in the cohort. Proportions of children with laboratory-confirmed influenza were derived from children followed weekly. The societal perspective and one-year analytic horizon were used for each influenza season; the model was repeated for three influenza seasons (2012–2014). Direct and indirect costs associated with influenza illness were collected and summed. Cost of the trivalent inactivated seasonal influenza vaccine (IIV3) including promotion, administration, and supervision cost was added for children who were vaccinated. Quality-adjusted life years (QALY), derived from literature, were used to quantify health outcomes. The incremental cost-effectiveness ratio (ICER) was calculated as the difference in the expected total costs between the vaccinated and unvaccinated groups divided by the difference in QALYs for both groups. Results: Compared to no vaccination, IIV3 vaccination among children ≤60 months in our cohort was not cost-effective in the introductory year (2012 season; 24,450 USD/QALY gained), highly cost-effective in the 2013 season (554 USD/QALY gained), and cost-effective in the 2014 season (16,200 USD/QALY gained). Conclusion: The cost-effectiveness of IIV3 vaccination among children participating in the cohort study varied by influenza season, with vaccine cost and proportion of high-risk children demonstrating the greatest influence in sensitivity analyses. Vaccinating children against influenza can be economically favorable depending on the maturity of the program, influenza vaccine performance, and target population.

Suggested Citation

  • Wanitchaya Kittikraisak & Piyarat Suntarattiwong & Darunee Ditsungnoen & Sarah E Pallas & Taiwo O Abimbola & Chonticha Klungthong & Stefan Fernandez & Suchada Srisarang & Tawee Chotpitayasunondh & Fat, 2017. "Cost-effectiveness of inactivated seasonal influenza vaccination in a cohort of Thai children ≤60 months of age," PLOS ONE, Public Library of Science, vol. 12(8), pages 1-15, August.
    • Handle: RePEc:plo:pone00:0183391
    DOI: 10.1371/journal.pone.0183391
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    References listed on IDEAS

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    1. Drummond, Michael F. & Sculpher, Mark J. & Torrance, George W. & O'Brien, Bernie J. & Stoddart, Greg L., 2005. "Methods for the Economic Evaluation of Health Care Programmes," OUP Catalogue, Oxford University Press, edition 3, number 9780198529453.
    2. Johannesson, Magnus, 1996. "The willingness to pay for health changes, the human-capital approach and the external costs," Health Policy, Elsevier, vol. 36(3), pages 231-244, June.
    3. Aronrag Meeyai & Naiyana Praditsitthikorn & Surachai Kotirum & Wantanee Kulpeng & Weerasak Putthasri & Ben S Cooper & Yot Teerawattananon, 2015. "Seasonal Influenza Vaccination for Children in Thailand: A Cost-Effectiveness Analysis," PLOS Medicine, Public Library of Science, vol. 12(5), pages 1-25, May.
    4. Ayman Chit & Julie Roiz & Samuel Aballea, 2015. "An Assessment of the Expected Cost-Effectiveness of Quadrivalent Influenza Vaccines in Ontario, Canada Using a Static Model," PLOS ONE, Public Library of Science, vol. 10(7), pages 1-15, July.
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