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. 2021 Jan 7;272:113688. doi: 10.1016/j.socscimed.2021.113688

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