2010 A(H1N1) vaccination in pregnant women in Brazil: identifying coverage and associated factors.

Raul Andres Mendoza-Sassi,Linjie Zhang,Viviane Kubiszewski Dos Santos,Ivanise Almeida Duarte,Luana Mostardeiro Friedrich,Juraci Almeida Cesar,Jussara Maria Cagol

doi:10.1590/0102-311x00084514

Raul Andres Mendoza-Sassi, Linjie Zhang + Show 5 more

Open Access

https://doi.org/10.1590/0102-311x00084514

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Abstract

We studied vaccination coverage and its associated factors in the 2010 pandemic influenza vaccination of Brazilian pregnant women. A cross-sectional study of pregnant women who had given birth was performed in a municipality in southern Brazil, in 2010. Data about vaccination against A(H1N1) and sociodemographic characteristics, morbidities and prenatal care were collected. Statistical analysis was performed using a Poisson regression. Coverage was 77.4%. Most were vaccinated in the public sector (97.6%) and in the second trimester (47%). Associated factors that increased vaccination were marriage, older age, first income quartile, prenatal care and influenza before pregnancy. Education and skin color were not significantly associated with vaccination. The vaccination campaign was extensive and exhibited no inequality. Prenatal care was the factor that most affected vaccination coverage, reflecting its importance for vaccination campaign success.

Highlights

MethodsInfluenza is a highly contagious disease that has affected mankind for centuries
At the first level and after adjustment, increased vaccination was observed among women over 20 years (20-24 years, prevalence ratio (PR) = 1.16, 95% confidence interval (95%CI): 1.04-1.30; 25-29 years, PR = 1.15, 95%CI: 1.03-1.29; 30 years or more, PR = 1.10, 95%CI: 0.98-1.23; p heterogeneity test = 0.02) and participants with husbands (PR = 1.18, 95%CI: 1.06-1.31)
At the second level of analysis, women who had received prenatal care were 63% more likely to receive the vaccine (PR = 1.63, 95%CI: 1.21-2.18)

Summary

Introduction

MethodsInfluenza is a highly contagious disease that has affected mankind for centuries. Human Influenza; Vaccination; Pregnant Women; Prenatal Care Independent variables were reported by the pregnant women and included age, ethnicity, level of education (incomplete primary school, completed primary school, completed high school, incomplete or completed university) family per capita income (classified in quartiles), marital status (married or cohabiting with partner), smoking during pregnancy (having smoked in any of the three trimesters of pregnancy), prenatal care (at least one prenatal care visit), number of prenatal care visits, previous ILI (influenza-like illness) within three months of the pregnancy.

Results

Conclusion