Table 3.
Factors associated with COVID-19 vaccine uptake among ANSPS respondents in 2021
| Characteristics | Univariable analysis | Multivariable analysis | ||
|---|---|---|---|---|
| Unadjusted odds ratio (95% CI) | p value | Adjusted§ odds ratio (95% CI) | p value | |
| Gender | ||||
| Male | 1 | 1 | ||
| Female | 0.75 (0.59, 0.95) | 0.017 | 0.70 (0.54, 0.92) | 0.009 |
| Sexual orientation | ||||
| Heterosexual | 1 | 1 | ||
| Bisexual | 0.82 (0.57, 1.120) | 0.310 | 0.88 (0.58, 1.34) | 0.543 |
| Gay/lesbian | 1.19 (0.77, 1.84) | 0.421 | 1.16 (0.72, 1.87) | 0.532 |
| Age | ||||
| < 40 years | 1 | 1 | ||
| 40–49 years | 1.41 (1.07, 1.87) | 0.014 | 1.18 (0.87, 1.61) | 0.295 |
| 50+ year | 2.80 (2.07, 3.78) | < 0.001 | 1.12 (0.75, 1.67) | 0.592 |
| Aboriginal and Torres Strait Islander | ||||
| No | 1 | 1 | ||
| Yes | 1.01 (0.78, 1.32) | 0.913 | 1.10 (0.81, 1.46) | 0.586 |
| Parents language at home | ||||
| Not English | 1 | 1 | ||
| English | 0.95 (0.53, 1.69) | 0.856 | 0.87 (0.46. 1.64) | 0.670 |
| Frequency of injection | ||||
| Less than daily | 1 | 1 | ||
| Daily | 0.78 (0.61, 1.00) | 0.054 | 0.75 (0.57, 1.00) | 0.042 |
| No injection last month | 0.96 (0.68, 1.38) | 0.839 | 1.01 (0.68, 1.50) | 0.972 |
| Drug last injected | ||||
| Other drugs (ref) | 1 | 1 | ||
| Methamphetamine | 1.49 (0.98, 2.24) | 0.060 | 1.57 (1.00, 2.50) | 0.052 |
| Heroin/other opioids | 2.15 (1.41, 3.28) | < 0.001 | 1.91 (1.20, 3.05) | 0.007 |
| Current OAT | ||||
| No | 1 | 1 | ||
| Yes | 1.94 (1.49, 2.54) | < 0.001 | 1.70 (1.23, 2.33) | 0.001 |
| Imprisonment | ||||
| No | 1 | 1 | ||
| Yes | 1.06 (0.73, 1.55) | 0.766 | 1.34 (0.88, 2.05) | 0.172 |
| SARS-CoV-2 diagnostic test | ||||
| No | 1 | 1 | ||
| Yes | 3.11 (2.42, 4.00) | < 0.001 | 2.90 (2.22, 3.79) | < 0.001 |
| HIV status | ||||
| Negative | 1 | 1 | ||
| Positive | 5.75 (1.67, 19.85) | 0.006 | 2.96 (0.83, 10.52) | 0.100 |
| Hepatitis C antibody status | ||||
| Negative | 1 | 1 | ||
| Positive | 0.91 (0.71, 1.16) | 0.442 | 1.01 (0.76, 1.33) | 0.967 |
| Duration of eligibility | ||||
| ≤ 4.0 months | 1 | 1 | ||
| > 4.0 months | 3.77 (2.96, 4.81) | < 0.001 | 3.42 (2.65, 4.41) | < 0.001 |
§Bolded odds ratios are from multivariable model which included six variables: gender, frequency of injection, drug last injected, current OAT, SARS-CoV-2 test, and duration of vaccine eligibility; all other odds ratios were adjusted for these six variables