Exploring Tdap and influenza vaccine uptake and its determinants in pregnancy: a cross-sectional study

Abstract

Background: The literature claims that an increased risk of complications from pertussis and influenza exists for pregnant women and infants. Maternal tetanus, diphtheria, and acellular pertussis (Tdap) and influenza vaccines seem to decrease this risk so that several countries are committed to increase vaccination uptake, but not all of them know their own vaccination coverage and factors that motivate this population to vaccination.

Study design: A cross-sectional survey was conducted.

Methods: We conducted this survey to estimate among pregnant women: 1) the vaccine coverage, 2) the availability of information, 3) the knowledge about maternal Tdap and influenza vaccination, 4) the factors that could have driven unvaccinated pregnant women to have themselves vaccinated. In addition, determinants of Tdap and influenza vaccine uptake and correct knowledge about vaccine-preventable diseases and vaccination in pregnancy were assessed using univariate and multivariate analyses.

Results: Of the 250 women included in the present study, only 58 (23.2%, 95% Confidence Interval (CI): 18-28.4%) and 21 (8.1%, 95% CI: 5-11.8%) reported that they had been vaccinated with Tdap and influenza vaccine, respectively, during their current pregnancy. The most common reasons cited for getting themselves vaccinated was having background knowledge of the health problems due to the diseases prevented by Tdap and influenza vaccines, awareness regarding these vaccines being recommended in pregnancy, knowledge of their effectiveness and/or side effects, and having been informed about vaccination by a healthcare professional.

Conclusions: Influenza and Tdap vaccine uptake among pregnant women in Italy is low, however, the present study showed that women are available to get vaccinated during pregnancy when adequately informed about the vaccines recommended.

Keywords: Influenza; Maternal immunization; Pertussis; Pregnancy; Vaccination; Vaccine recommendations.