Table 2.
Linear regression model of the within-family average likelihood of having children vaccinated.
| Estimate | SE | t | Pr (>|t|) | |
|---|---|---|---|---|
| Intercept | 26.63 | 16.68 | 1.60 | 0.11 |
| Demographics | ||||
| Parents’ sex – male (female as ref grp) | −0.28 | 4.18 | 0.07 | 0.95 |
| Parents’ age | 0.45 | 0.22 | 2.09 | 0.04* |
| Family size | −0.71 | 1.20 | 0.59 | 0.56 |
| Socio-economic status | 0.14 | 1.53 | 0.09 | 0.93 |
| Children’s average age – baby as ref grp | ||||
| Preschool | −2.82 | 3.31 | 0.85 | 0.39 |
| Child | −1.53 | 3.51 | 0.44 | 0.66 |
| Adolescent | −3.24 | 5.11 | 0.63 | 0.53 |
| Region of residence – Central as ref grp | ||||
| Atlantic | 3.26 | 2.40 | 1.36 | 0.18 |
| Prairies | 8.29 | 3.42 | 2.42 | 0.02* |
| Western | 4.00 | 4.16 | 0.96 | 0.34 |
| Health variables | ||||
| Proportion of family members with a doctor | −1.56 | 6.41 | 0.24 | 0.81 |
| Children's average 1 COVID-19 health risk (ref grp = 0 risks) | −4.66 | 3.98 | 1.17 | 0.24 |
| Children's average ≥ 2 COVID-19 health risks (ref grp = 0 risks) | 4.07 | 6.68 | 0.61 | 0.54 |
| Children’s average past vaccine completeness | 2.19 | 1.11 | 1.98 | 0.05* |
| Children’s previous VAE (ref grp = no VAEs) | 1.05 | 3.22 | 0.33 | 0.74 |
| Parents’ past vaccine completeness | 2.22 | 1.38 | 1.60 | 0.11 |
| Parents’ previous VAE (ref grp = no VAEs) | −2.69 | 3.81 | 0.71 | 0.48 |
| Parents’ number of COVID-19 health risks (continuous) | −0.08 | 1.01 | 0.08 | 0.93 |
| Attitudes towards vaccines | ||||
| Perceived danger | −0.29 | 0.15 | 1.91 | 0.06. |
| Powerless | 0.15 | 0.33 | 0.47 | 0.64 |
| Trust in authority | 0.79 | 0.53 | 1.49 | 0.14 |
| Omission bias | 1.76 | 0.19 | 9.47 | <0.001*** |
| COVID-19 risk perceptions | ||||
| Proximal COVID-19 risk | −0.81 | 1.45 | 0.56 | 0.58 |
| Distal COVID-19 risk | 1.19 | 1.64 | 0.73 | 0.47 |
| Psychological distance | ||||
| COVID-19 relationship score | 0.03 | 0.17 | 0.17 | 0.87 |
| COVID-19 outcome score | −0.01 | 0.28 | 0.02 | 0.98 |
| Impact of COVID-19 pandemic event | ||||
| Intrusion | −0.10 | 0.34 | 0.28 | 0.78 |
| Avoidance | 0.53 | 0.29 | 1.81 | 0.07. |
| Arousal | −0.34 | 0.46 | 0.75 | 0.45 |
| Anxiety | ||||
| State | 0.07 | 0.12 | 0.56 | 0.58 |
| Trait | 0.14 | 0.14 | 0.98 | 0.33 |
Notes: (1) Ref grp = reference group. All categorical variables must be compared against a reference group as indicated in the table. (2) VAE = vaccine adverse event. (3) SE = standard error. (4) Negative scores indicate higher omission bias; thus, lower omission bias is associated with increased likelihood of having one’s child vaccinated. .p < 0.1, *p < 0.05, **p < 0.01, ***p < 0.001.