Abstract
Objective: To examine the association between financial incentives from entry into a vaccine competition with the probability of vaccination for COVID-19.
Design: A cross-sectional study with adjustment for covariates using logistic regression.
Setting: October and November 2021, Australia.
Participants: 2375 respondents of the Taking the Pulse of the Nation survey.
Primary and secondary outcome measures: The proportion of respondents who had any vaccination, a first dose only, or second dose after the competition opened.
Results: Those who entered the competition were 2.27 (95% CI 1.73 to 2.99) times more likely to be vaccinated after the competition opened on 1 October than those who did not enter-an increase in the probability of having any dose of 0.16 (95 % CI 0.10 to 0.21) percentage points. This increase was mostly driven by those receiving second doses. Entrants were 2.39 (95% CI 1.80 to 3.17) times more likely to receive their second dose after the competition opened.
Conclusions: Those who entered the Million Dollar Vax competition were more likely to have a vaccination after the competition opened compared with those who did not enter the competition, with this effect dominated by those receiving second doses.
Keywords: COVID-19; INFECTIOUS DISEASES; Public health.
【저자키워드】 COVID-19, Infectious diseases, public health., 【초록키워드】 Vaccine, vaccination, cross-sectional, Probability, Health, Logistic regression, association, dose, 95% CI, second dose, nation, first dose, secondary outcome, covariate, doses, Public, 95 % CI, proportion, receiving, increase in, driven by, Taking, receive, 【제목키워드】 COVID-19 vaccination,