Table 3.
Results of multiple regression analysis.
| Variables | Unstandardized coefficients | Standardized coefficients beta | t | Sig. | |
|---|---|---|---|---|---|
| B | Std. Error | ||||
| Model 1 (Control variables only) | |||||
| (Constant) | 2.93 | 0.27 | 10.739 | 0.000 | |
| Control variables | |||||
| Relationship with the child in question | −0.08 | 0.08 | −0.030 | −1.117 | 0.264 |
| Age (years) | 0.26 | 0.05 | 0.139 | 4.716 | 0.000 |
| Number of children in total | 0.07 | 0.04 | 0.047 | 1.718 | 0.086 |
| Age of the child in question (years) | 0.05 | 0.01 | 0.131 | 4.420 | 0.000 |
| Perceived level of COVID-19 vaccine knowledge | 0.07 | 0.03 | 0.055 | 2.060 | 0.040 |
| No history of COVID-19 vaccination | −0.76 | 0.08 | −0.259 | −9.630 | 0.000 |
| F = 34.053, d.f. = 6, P < 0.001, R = 0.380, R2 = 0.144, adjusted R2 = 0.140 | |||||
| Model 2 (TPB constructs, and control variables) | |||||
| (Constant) | 0.47 | 0.21 | 2.264 | 0.024 | |
| Control variables | |||||
| Age (years) | 0.10 | 0.04 | 0.056 | 2.879 | 0.004 |
| Age of the child in question (years) | 0.01 | 0.01 | 0.017 | 0.892 | 0.373 |
| Perceived level of COVID-19 vaccine knowledge | −0.01 | 0.02 | −0.010 | −0.573 | 0.567 |
| No history of COVID-19 vaccination | −0.18 | 0.05 | −0.063 | −3.415 | 0.001 |
| Number of children in total | −0.03 | 0.03 | −0.020 | −1.129 | 0.259 |
| Relationship with the child in question | −0.03 | 0.05 | −0.011 | −0.612 | 0.541 |
| TPB constructs | |||||
| TPB construct 1 - Attitude | 0.52 | 0.03 | 0.457 | 17.738 | 0.000 |
| TPB construct 2 - Subjective norm | 0.39 | 0.03 | 0.363 | 14.070 | 0.000 |
| TPB construct 3 - Perceived behavioral Control | 0.02 | 0.04 | 0.012 | 0.668 | 0.505 |
| F = 236.238, d.f. = 9, P < 0.001, R = 0.799, R2 = 0.638, adjusted R2 = 0.635 | |||||
| Model 3 (Sub-items of the TPB constructs, and control variables) | |||||
| (Constant) | 1.859 | 0.168 | 11.067 | 0.000 | |
| Age (years) | 0.096 | 0.032 | 0.052 | 3.015 | 0.003 |
| No history of COVID-19 vaccination | −0.206 | 0.053 | −0.070 | −3.886 | 0.000 |
| TPB construct 1 - Attitude | |||||
| “A COVID-19 vaccine will be important for my child/children's health.” | 0.067 | 0.024 | 0.078 | 2.758 | 0.006 |
| “Getting a COVID-19 vaccine would be a good way to protect child/children from COVID-19.” | 0.098 | 0.027 | 0.118 | 3.662 | 0.000 |
| “A COVID-19 vaccine is effective if it is approved by the government.” | 0.026 | 0.026 | 0.031 | 1.034 | 0.301 |
| “Getting a COVID19 vaccine will be important for the health of others in my community.” | 0.072 | 0.027 | 0.078 | 2.713 | 0.007 |
| “A COVID-19 vaccine will not have been around long enough to be sure it is safe.” | −0.025 | 0.020 | −0.029 | −1.303 | 0.193 |
| “I am concerned about serious side effects of a COVID-19 vaccine.” | −0.095 | 0.022 | −0.109 | −4.313 | 0.000 |
| “I think a COVID-19 vaccine might cause lasting health problems for my child/children.” | −0.077 | 0.021 | −0.091 | −3.760 | 0.000 |
| TPB construct 2 - Subjective norm | |||||
| “My spouse would support me in having my child/children take up COVID-19 vaccination.” | 0.172 | 0.023 | 0.223 | 7.483 | 0.000 |
| “My other family members would support me in having my child/children take up COVID-19 vaccination.” | 0.090 | 0.028 | 0.109 | 3.261 | 0.001 |
| “My friends would support me in having my child/children take up COVID-19 vaccination.” | 0.051 | 0.029 | 0.056 | 1.755 | 0.079 |
| “Many of my parent friends will have their child/children take up COVID-19 vaccination.” | 0.089 | 0.024 | 0.100 | 3.736 | 0.000 |
| “The school expects the students to take up COVID-19 vaccination.” | 0.019 | 0.023 | 0.020 | 0.821 | 0.412 |
| “The community expects the children to take up COVID-19 vaccination.” | −0.027 | 0.023 | −0.030 | −1.214 | 0.225 |
| F = 156.628, d.f. = 15, P < 0.001, R = 0.813, R2 = 0.662, adjusted R2 = 0.658 | |||||