International Scholarly Research Notices / 2013 / Article / Tab 1 / Research Article
Influenza Vaccination in Pregnant Women: A Systematic Review Table 1 Main characteristics of the included studies.
Study Period of enrollment Country Study design Influenza vaccine group (
) Control group (
) Gestational month at immunization Hulka 1964 [34 ] 1962-1963 USA Prospective cohort Polyvalent inactivated (363) Placebo >3rd*
Black et al. 2004 [35 ] 1997–2002 USA Retrospective cohort Trivalent inactivated (3,707) No vaccine (45,878) 7th–9th
Munoz et al. 2005 [36 ] 1998–2003 USA Matched retrospective cohort Trivalent inactivated (225) No vaccine 4th–9th
France et al. 2006 [37 ] 1995–2001 USA Matched retrospective cohort Trivalent inactivated (3,160) No vaccine (37,969) 4th–9th Zaman et al. 2008 [38 , 39 ] 2004-2005 Bangladesh Randomized controlled trial Trivalent inactivated (172) Pneumococcal vaccine 7th–9th
Eick et al. 2011 [40 ] 2002–2005 USA Prospective cohort Trivalent inactivated (573) No vaccine 4th–9th
Omer et al. 2011 [41 ] 2004–2006 USA Retrospective cohort Trivalent inactivated (578) No vaccine (3,590) 1st–9th
Sheffield et al. 2012 [42 ] 2003–2008 USA Retrospective cohort Trivalent inactivated (8,690) No vaccine (76,153) 1st–9th†
Data assumed by the authors from information available in the paper.
From October 2003 through March 2004, women were vaccinated in the second and third trimesters. From October 2004 through March 2008, women were vaccinated in all three trimesters.
: number of pregnant women in each group.
