Table 3.
Associations between background characteristics and completion of primary COVID-19 vaccination series among older adults in Hong Kong (n = 440).
| Completion of Primary COVID-19 Vaccination Series (%) | OR (95% CI) | p-Value | Cohen’s d | |
|---|---|---|---|---|
| Sociodemographic characteristics | ||||
| Age group, years | ||||
| 65–69 | 59.4 | 1.0 | ||
| 70–74 | 64.6 | 1.25 (0.81–1.93) | 0.31 | 0.12 |
| ≥75 | 43.2 | 0.52 (0.31–0.89) | 0.02 | −0.36 |
| Gender | ||||
| Male | 57.9 | 1.0 | ||
| Female | 58.7 | 1.04 (0.70–1.53) | 0.86 | 0.02 |
| Relationship status | ||||
| Currently single | 54.9 | 1.0 | ||
| Married or cohabiting with a partner | 59.6 | 1.22 (0.79–1.87) | 0.38 | 0.11 |
| Education level | ||||
| Primary or below | 54.5 | 1.0 | ||
| Secondary | 58.9 | 1.19 (0.80–1.78) | 0.39 | 0.10 |
| Tertiary or above | 72.7 | 2.22 (1.08–4.58) | 0.03 | 0.44 |
| Current employment status | ||||
| Unemployed/retired/housewife | 56.0 | 1.0 | ||
| Full-time/part-time | 73.0 | 2.13 (1.18–3.85) | 0.01 | 0.42 |
| Monthly household income, HK$ (US$) | ||||
| <20,000 (2580) | 57.0 | 1.0 | ||
| ≥20,000 (2580) | 58.6 | 1.07 (0.61–1.88) | 0.82 | 0.04 |
| Refused to disclose | 66.7 | 1.51 (0.82–2.77) | 0.18 | 0.23 |
| Receiving Comprehensive Social Security Assistance (CSSA) 1 | ||||
| No | 60.3 | 1.0 | ||
| Yes | 34.4 | 0.35 (0.16–0.74) | 0.01 | −0.58 |
| Living alone | ||||
| No | 60.2 | 1.0 | ||
| Yes | 50.6 | 0.68 (0.42–1.10) | 0.12 | −0.21 |
| Lifestyles and health conditions | ||||
| Smoking in the past year | ||||
| No | 59.2 | 1.0 | ||
| Yes | 48.4 | 0.65 (0.31–1.34) | 0.24 | −0.24 |
| Binge drinking in the past year | ||||
| No | 58.4 | 1.0 | ||
| Yes | 60.0 | 1.07 (0.30–3.85) | 0.92 | 0.04 |
| Presence of chronic conditions | ||||
| No | 63.4 | 1.0 | ||
| Yes | 55.2 | 0.71 (0.48–1.06) | 0.09 | −0.19 |
| History of COVID-19 | ||||
| No | 58.8 | 1.0 | ||
| Yes | 37.5 | 0.42 (0.10–1.78) | 0.24 | −0.48 |
| Uptake of other vaccination | ||||
| History of seasonal influenza vaccination | ||||
| No | 53.4 | 1.0 | ||
| Yes | 61.7 | 1.41 (0.96–2.07) | 0.08 | 0.19 |
| History of pneumococcal vaccination | ||||
| No | 54.5 | 1.0 | ||
| Yes | 70.3 | 1.98 (1.25–3.14) | 0.004 | 0.38 |
1 CSSA: a governmental financial support scheme providing a safety net for those who cannot support hemselves financially. OR—crude odds ratios; CI—confidence interval.