MINISTER OF EDUCATION UNIVERSITY OF ECONOMICS HO CHI MINH CITY MINH HAI, PHAN PREFERENCES FOR SEASONAL INFLUENZA VACCINE FOR WORKING ADULTS IN HO CHI MINH CITY: A DISCRETE CHOICE EXPERIMENT THESIS FOR MASTER OF HEALTH ECONOMIC MANAGEMENT Ho Chi Minh, City – 2015 MINISTER OF EDUCATION UNIVERSITY OF ECONOMICS HO CHI MINH CITY MINH HAI, PHAN PREFERENCES FOR SEASONAL INFLUENZA VACCINE FOR WORKING ADULT IN HO CHI MINH CITY: A DISCRETE CHOICE EXPERIMENT Faculty: Development Economic Code: 60310105 THESIS FOR MASTER OF HEALTH ECONOMIC MANAGEMENT INSTRUCTOR: DR. DANG THUY, TRUONG Ho Chi Minh, City – 2015 ABSTRACT Introduction: Seasonal influenza is viral infection which affects 5%–10% in adults and 20%–30% in children, and the influenza vaccine, also known as flu shot, is an annual vaccination using a vaccine that is specific for a given year. There is increasing interest in benefit of vaccination coverage in health working adults which reduced work loss. From 2005, the vaccine manufacturing capacity are increasing globally and especially in Viet Nam, that would support in price and number of doses in broadening the vaccination.
We conduct the study to assess the influencing factors for vaccination in working adults and how to increase the vaccination in population via the willingness to pay model. Method: We conducted a discrete choice experiment, a quantitative approach which often used in health economic studies. In which, the questionnaire with socio-economic and discrete choice experiment questions was collected for 172 respondents. The conditional logit model was used to estimate the relative importance of influenza vaccine attributes: effectiveness (50%, 70%, 90%); adverse event (0%, 5%,10%), time of vaccination process (45 minutes, 60 minutes, 90 minutes); place of vaccination (working place, healthcare center); cost (150,000 VND 200,000 VND 250,000 VND and 300,000 VND).
Based on the utility functions, the willingness to pay and potential vaccination coverage was estimated for different vaccine scenarios and price support strategy. Result: The results indicated the effectiveness and adverse event are two valuable influence (p value<0.1), and the cost dose not impact significantly to the decision of vaccination. Meanwhile, the coefficient of place of vaccination is too high which is suspected as implausible value. Conclusion: Respondent would choose the high effectiveness and low adverse event for vaccination, by contrast, it will reduce the preference if high cost, long time for vaccination, and working place.
The availability of more than 1 vaccine can increase the number of vaccination cases, then the well-fare were also increased. It could be explained that people will prefer the vaccination if there more options for consideration. Although, the statistical number could help us to predict the trend of vaccination, but the education to community is very important. Keywords: Working adults, influenza vaccination, and discrete choice experiment, utility, conditional logit model.
ACKNOWLEDGEMENT I would like to deeply express my gratitude and appreciation to Dr. Truong Dang Thuy, who provided the intensive, supportive, valuable and vital supervision for thesis completion. I had a great opportunity to access the econometric method and how to apply in Viet Nam which has very a few application in health sectors. I was inspired by his knowledge, enthusiasm and professionalism.
Throughout my thesis process, he was always patient, supportive in the right directions, encouraged me to pursue my own research ideas and provided a great amount of valuable suggestions and guidance. I appreciate all his contributions of time, advice to make me successfully complete the thesis. I would like to express my appreciation and respect for teachers of master of health economic management program, who have delivered the useful and practical knowledge in health economic, which I had perceived at the first time. I would also like to thank all the faculty, staff and students for their friendships and collaboration during last 2 years.
I would like to be grateful to my colleges, friend and especial my bother in supporting me for business, life and activities of data collection. Thanks for my family always as my support overcomes all the difficulties and pursue the real goal in my life. With all appreciation, HCM, Aug 2015 TABLE OF CONTENT ABSTRACT. 4 TABLE OF CONTENT.
9 CHAPTER 1: INTRODUCTION AND RESEARCH ISSUE .1 Introduction of Influenza .2 Burden of influenza .