Table 2.
The multivariate analysis of the association between pertussis-like illness, maternal vaccination, and potential confounders in infants aged under six months born in the Metropolitan Region of Recife from July 2016 to July 2018.
| Variables | Odds ratio | Confidence interval (95%) | p-Valuea |
|---|---|---|---|
| Maternal vaccination (Tdap) | |||
| Vaccinated | 1 | ||
| Unvaccinated | 0.81 | (0.40, 1.64) | 0.56 |
| Breastfeeding | |||
| Breastfed <6 months | 1 | ||
| Exclusively breastfed for 6 months | 0.44 | (0.17, 1.14) | 0.09 |
| Gestational age at birth | |||
| Term (≥ 37 weeks and < 42 weeks) | 1 | ||
| Pre-term (< 37 weeks) | 3.21 | (0.83, 12.43) | 0.09 |
| Post-term (≥ 42 weeks) | 2.97 | (0.54, 16.12) | 0.2 |
a
X2 Chi-square or Fisher’s tests.