tetano
Editor, Senior Moderator
J Matern Fetal Neonatal Med. 2013 Feb 13. [Epub ahead of print]
Selective Uptake of Influenza Vaccine and Pregnancy Outcomes.
Cantu J, Biggio J, Jauk V, Wetta L, Andrews W, Tita A.
Source
Center for Women's Reproductive Health at the University of Alabama at Birmingham, Birmingham, AL.
Abstract
Abstract Objective: To describe the characteristics of pregnant women who accept the influenza vaccine and evaluate the relationship between vaccination and adverse pregnancy outcomes. Methods: Retrospective cohort study of women receiving prenatal care during the 2009-2011 influenza seasons. Vaccination status was ascertained through our perinatal record system and clinic vaccination logs. Pregnancy outcomes included a primary composite of miscarriage, fetal demise, preterm birth (PTB) <37 weeks and neonatal demise. Stratification and logistic regression were used to adjust for potential confounders. Results: Of 3,104 eligible pregnant women, 1,094 (35%) received the influenza vaccine. Women vaccinated were more likely to be older, obese, primiparae, and have medical complications or a prior PTB. In univariable analyses, flu vaccination was associated with increased adverse composite outcome and PTB. After multivariable adjustments, vaccination was no longer associated with adverse outcomes in women with medical complications but remained associated with adverse outcomes among those without known co-morbidity. Conclusions: Vaccination was associated with increased adverse composite outcome in pregnant women without identified co-morbidity but not those with co-morbidities. This association is likely due to selection bias, which should be considered in planning of observational studies of the impact of vaccination on pregnancy outcomes.
PMID:
23406444
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23406444
Selective Uptake of Influenza Vaccine and Pregnancy Outcomes.
Cantu J, Biggio J, Jauk V, Wetta L, Andrews W, Tita A.
Source
Center for Women's Reproductive Health at the University of Alabama at Birmingham, Birmingham, AL.
Abstract
Abstract Objective: To describe the characteristics of pregnant women who accept the influenza vaccine and evaluate the relationship between vaccination and adverse pregnancy outcomes. Methods: Retrospective cohort study of women receiving prenatal care during the 2009-2011 influenza seasons. Vaccination status was ascertained through our perinatal record system and clinic vaccination logs. Pregnancy outcomes included a primary composite of miscarriage, fetal demise, preterm birth (PTB) <37 weeks and neonatal demise. Stratification and logistic regression were used to adjust for potential confounders. Results: Of 3,104 eligible pregnant women, 1,094 (35%) received the influenza vaccine. Women vaccinated were more likely to be older, obese, primiparae, and have medical complications or a prior PTB. In univariable analyses, flu vaccination was associated with increased adverse composite outcome and PTB. After multivariable adjustments, vaccination was no longer associated with adverse outcomes in women with medical complications but remained associated with adverse outcomes among those without known co-morbidity. Conclusions: Vaccination was associated with increased adverse composite outcome in pregnant women without identified co-morbidity but not those with co-morbidities. This association is likely due to selection bias, which should be considered in planning of observational studies of the impact of vaccination on pregnancy outcomes.
PMID:
23406444
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23406444