Table 4.
Factors associated with the intention to receive a third COVID-19 vaccine dose (n = 638).
| Intention to receive a third COVID-19 dose |
Adjusted OR
(95% CI) |
p-value | ||
|---|---|---|---|---|
| Factor |
Yes
(n = 269) |
No
(n = 369) |
||
| Age group (years) | ||||
| 18–34 (reference group) | 80 (30.8) | 180 (69.2) | ||
| 35–44 | 142 (47.5) | 157 (52.5) | 1.61 (1.09–2.38) | 0.017 |
| 55+ | 47 (59.5) | 32 (40.5) | 1.92 (1.06–3.49) | 0.032 |
| Sex | ||||
| Female (reference group) | 163 (40.8) | 237 (59.2) | ||
| Male | 106 (44.5) | 132 (55.5) | 1.04 (0.71–1.53) | 0.822 |
| Cohort | ||||
| First (R1-R10) | 63 (31.7) | 136 (68.3) | ||
| Second (R10 “top-up”) | 206 (46.9) | 233 (53.1) | 2.04 (1.36–3.10) | 0.001 |
| Smoking status | ||||
| Non-smoker (reference group) | 236 (41.0) | 340 (59.0) | ||
| Smoker | 33 (53.2) | 29 (46.8) | 2.21 (1.22–4.03) | 0.009 |
| Experienced any adverse effects 1 | ||||
| No (reference group) | 109 (55.3) | 88 (44.7) | ||
| Yes | 160 (36.3) | 281 (63.7) | 0.52 (0.35–0.77) | 0.001 |
| Constructs of vaccine hesitancy2 (median, IQR) | ||||
| Confidence | 5.3 (4.0–6.0) | 4.0 (3.3–5.0) | 1.54 (1.30–1.84) | <0.001 |
| Complacency | 3.3 (2.3–4.0) | 4.0 (3.0–4.3) | 0.85 (0.71–1.01) | 0.070 |
| Constraint | 2.7 (2.0–4.0) | 3.7 (2.7–4.0) | 0.82 (0.69–0.98) | 0.027 |
| Calculation | 5.7 (4.7–6.0) | 5.3 (4.3–6.0) | 0.94 (0.77–1.14) | 0.536 |
| Collective | 5.7 (4.7–6.3) | 4.7 (4.0–5.7) | 1.30 (1.04–1.64) | 0.023 |
1From the first and/or second COVID-19 vaccine dose.
2Average scores of items within each construct were computed, with higher scores indicating higher levels of the constructs. Cronbach's alpha values for the 5 constructs ranged from 0.72 - 0.87.OR,Odds ratio; CI, Confidence interval. Bold figures indicate p-values smaller than 0.05.