Table 3. Factors potentially associated with influenza vaccine uptake during pregnancy.
| Univariate binomial regression | Multivariable binomial regression | |||||||
|---|---|---|---|---|---|---|---|---|
| Variable | Level | Received maternal influenza vaccine n (%) | Unadjusted odds ratio (OR) |
95% CI | p-valueb | Adjusted odds ratio (AOR)a |
95% CI | p-value |
| Maternal age category | 21–31 | 81/96 (84%) | 1.00 | 1.00 | ||||
| 32–43 | 55/83 (66%) | 0.36 | 0.17–0.74 | 0.005 | 0.40 | 0.17–0.92 | 0.031 | |
| Country of birth | Australia | 91/116 (78%) | 1.00 | |||||
| Other | 32/42 (76%) | 0.50 | 0.16–1.57 | 0.763 | ||||
| Parity | Primiparous | 69/82 (84%) | 1.00 | |||||
| Multiparous | 67/97 (71%) | 0.42 | 0.20–0.87 | 0.021 | 0.43 | 0.19–0.99 | 0.048 | |
| Provider recommendation received | No | 40/64 (63%) | 1.00 | 1.00 | ||||
| Yes | 96/115 (83%) | 3.03 | 1.49–6.14 | 0.001 | 2.81 | 1.19–6.68 | 0.002 | |
| A midwife delivered maternal immunization program | Prior | 8/25 (32%) | 1.00 | 1.00 | ||||
| Post introduction | 128/155(83%) | 8.00 | 3.06–20.91 | <0.001 | 5.95 | 2.13–16.61 | <0.001 | |
a Adjusted odds ratio comparing odds of receiving influenza vaccine during pregnancy if offered, controlling for other variables.
b Only univariate associations with p value <0.1 were included in the multivariable logistic regression