Table 2.
Mixed-logit model
| Attribute | Mean | Standard error | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Coefficient | Standard error | P value | 95% confidence interval | Coefficient | Standard error | P value | 95% confidence interval | |||
| ASC | 31.646 | 17,542.260 | 0.999 | −34,350.552 | 34,413.843 | 0.072 | 18,920.898 | 1.000 | −37,084.207 | 37,084.352 |
| Vaccine origin | ||||||||||
| Canada | (Reference) | |||||||||
| European Union | −0.559*** | 0.062 | 0.000 | −0.681 | −0.438 | −0.176 | 0.207 | 0.396 | −0.580 | 0.229 |
| USA | −0.636*** | 0.060 | 0.000 | −0.754 | −0.518 | 0.284* | 0.156 | 0.068 | −0.021 | 0.590 |
| Japan | −0.774*** | 0.064 | 0.000 | −0.900 | −0.649 | −0.471*** | 0.118 | 0.000 | −0.702 | −0.240 |
| Russia | −1.149*** | 0.064 | 0.000 | −1.275 | −1.023 | 0.617*** | 0.110 | 0.000 | 0.402 | 0.832 |
| China | −1.376*** | 0.070 | 0.000 | −1.513 | −1.239 | 1.004*** | 0.096 | 0.000 | 0.816 | 1.192 |
| Vaccine effectiveness (%) | ||||||||||
| 95 | (Reference) | |||||||||
| 85 | −0.380*** | 0.046 | 0.000 | −0.469 | −0.290 | 0.176 | 0.114 | 0.121 | −0.047 | 0.399 |
| 60 | −1.087*** | 0.052 | 0.000 | −1.188 | −0.985 | −0.415*** | 0.094 | 0.000 | −0.598 | −0.231 |
| 30 | −2.361*** | 0.070 | 0.000 | −2.498 | −2.223 | 1.096*** | 0.078 | 0.000 | 0.944 | 1.248 |
| Side effects of the vaccine | ||||||||||
| Redness and mild itching | (Reference) | |||||||||
| Mild fevers | −0.038 | 0.037 | 0.297 | −0.110 | 0.034 | −0.048 | 0.069 | 0.488 | −0.184 | 0.088 |
| Hospitalization | −1.770*** | 0.069 | 0.000 | −1.906 | −1.634 | 1.716*** | 0.079 | 0.000 | 1.561 | 1.870 |
| Duration of vaccine protection (months) | ||||||||||
| 24 | (Reference) | |||||||||
| 9 | −0.375*** | 0.040 | 0.000 | −0.454 | −0.296 | −0.044 | 0.075 | 0.557 | −0.190 | 0.103 |
| 3 | −0.803*** | 0.044 | 0.000 | −0.890 | −0.717 | −0.306*** | 0.092 | 0.001 | −0.486 | −0.127 |
| Priority population to receive the vaccine | ||||||||||
| 65 years and over | (Reference) | |||||||||
| Healthcare workers | −0.068* | 0.040 | 0.087 | −0.145 | 0.010 | −0.003 | 0.084 | 0.968 | −0.168 | 0.162 |
| No priority population | −0.082** | 0.041 | 0.045 | −0.162 | −0.002 | −0.154* | 0.088 | 0.080 | −0.326 | 0.018 |
| Waiting time to get vaccinated (months) | ||||||||||
| 2 | (Reference) | |||||||||
| 4 | −0.030 | 0.042 | 0.477 | −0.112 | 0.052 | 0.001 | 0.092 | 0.993 | −0.180 | 0.181 |
| 8 | −0.219*** | 0.041 | 0.000 | −0.299 | −0.139 | 0.148** | 0.074 | 0.044 | 0.004 | 0.292 |
| Recommender of the vaccine | ||||||||||
| World Health Organization and Quebec Public Health Department | (Reference) | |||||||||
| Quebec Public Health Department | −0.360*** | 0.042 | 0.000 | −0.441 | −0.278 | 0.031 | 0.082 | 0.703 | −0.130 | 0.193 |
| World Health Organization | −0.439*** | 0.042 | 0.000 | −0.521 | −0.358 | 0.001 | 0.087 | 0.989 | −0.169 | 0.171 |
| Observations | 57,564 | |||||||||
| Chi2 | 817 | |||||||||
| Log likelihood | −6400.122 | |||||||||
| Null Log likelihood | −6808.609 | |||||||||
| AIC | 12,876.240 | |||||||||
AIC Akaike Information Criterion, ASC alternative specific constant, * ** ***