Table 3.
Estimated ORs and IRRs of the hurdle model applied to the COVID-19 vaccine and estimated ORs of the logistic model applied to the flu vaccine.
Predictors | COVID-19 vaccine acceptance |
COVID-19 vaccine hesitancy |
Flu vaccine acceptance |
||||||
---|---|---|---|---|---|---|---|---|---|
OR | 95% CI | p-value | IRR | 95% CI | p-value | OR | 95% CI | p-value | |
Intercept | 0.11 | 0.07–0.17 | <0.001 | 61.98 | 54.73–70.29 | <0.001 | 0.03 | 0.02–0.07 | <0.001 |
Lockdown | 1.37 | 1.06–1.77 | 0.016 | 0.87 | 0.80–0.96 | 0.003 | 1.29 | 0.91–1.83 | 0.154 |
Re-opening | 2.07 | 1.50–2.86 | <0.001 | 0.97 | 0.88–1.08 | 0.605 | 1.82 | 1.16–2.87 | 0.009 |
COVID-19 Perc. Risk [Medium] | 2.46 | 1.85–3.27 | <0.001 | 0.72 | 0.66–0.79 | <0.001 | |||
COVID-19 Perc. Risk [High] | 4.86 | 3.53–6.74 | <0.001 | 0.60 | 0.53–0.67 | <0.001 | |||
Flu Perc. Risk [Medium] | 0.95 | 0.73–1.24 | 0.711 | 0.97 | 0.89–1.05 | 0.443 | 1.31 | 0.87–1.99 | 0.198 |
Flu Perc. Risk [High] | 0.96 | 0.73–1.27 | 0.794 | 0.89 | 0.80–0.98 | 0.019 | 2.08 | 1.40–3.11 | <0.001 |
EVD Perc. Risk [Medium] | 0.91 | 0.70–1.18 | 0.479 | 0.94 | 0.86–1.03 | 0.179 | |||
EVD Perc. Risk [High] | 1.14 | 0.87–1.49 | 0.349 | 0.90 | 0.82–0.99 | 0.023 | |||
Flu Vaccine 2019 | 2.83 | 2.14–3.76 | <0.001 | 0.66 | 0.58–0.76 | <0.001 | 38.55 | 27.81–54.15 | <0.001 |
Vaccine doubts 2nd quintile | 0.63 | 0.47–0.84 | 0.002 | 0.90 | 0.80–1.02 | 0.094 | 0.81 | 0.53–1.23 | 0.320 |
Vaccine doubts 3rd quintile | 0.39 | 0.29–0.52 | <0.001 | 1.02 | 0.91–1.14 | 0.762 | 0.59 | 0.38–0.90 | 0.015 |
Vaccine doubts 4th quintile | 0.19 | 0.14–0.26 | <0.001 | 1.18 | 1.06–1.31 | 0.002 | 0.29 | 0.17–0.46 | <0.001 |
Vaccine doubts 5th quintile | 0.13 | 0.09–0.18 | <0.001 | 1.51 | 1.35–1.69 | <0.001 | 0.20 | 0.11–0.35 | <0.001 |
Willingness to pay COVID-19 vaccine | 4.04 | 2.92–5.70 | <0.001 | 0.73 | 0.68–0.79 | <0.001 | 2.03 | 1.24–3.44 | 0.007 |
Age-class ≤ 25 | 1.65 | 1.27–2.14 | <0.001 | 0.76 | 0.70–0.83 | <0.001 | 1.12 | 0.74–1.69 | 0.591 |
Age-class (45,65] | 1.47 | 1.14–1.89 | 0.003 | 1.01 | 0.93–1.10 | 0.764 | 2.46 | 1.71–3.54 | <0.001 |
Age-class >65 | 1.26 | 0.73–2.18 | 0.413 | 0.99 | 0.81–1.21 | 0.897 | 2.97 | 1.48–5.99 | 0.002 |
Gender (Males) | 0.94 | 0.75–1.18 | 0.618 | 0.97 | 0.90–1.05 | 0.440 | 0.76 | 0.54–1.07 | 0.127 |
Deprivation index [Deprived] | 0.84 | 0.55–1.28 | 0.423 | 1.03 | 0.90–1.20 | 0.646 | 0.95 | 0.49–1.79 | 0.870 |
Italian Area [Center] | 0.78 | 0.46–1.32 | 0.366 | 0.92 | 0.79–1.09 | 0.330 | 1.07 | 0.46–2.25 | 0.873 |
Italian Area [South] | 1.23 | 0.76–1.99 | 0.395 | 0.94 | 0.79–1.11 | 0.463 | 1.40 | 0.68–2.83 | 0.356 |
Randomization order (Flu|COVID-19) | 0.80 | 0.65–0.98 | 0.028 | 1.21 | 1.13–1.30 | <0.001 | 0.70 | 0.51–0.94 | 0.020 |