Table 1.

Included publication characteristics.

Characteristic	Publication citation(s)
Vaccine of interest
Seasonal influenza only	[23,24,26,30,32,33,35,36,39,41,44–46,50,51,53,54,56,57,60,61,63,67,69–71,73,75–77,79,81,83,93–96]
Tdap only	[29,64,65,72,89,91,97]
pH1N1 only	[31,42,47,49,59,80,82,85,88,90]
Seasonal influenza and pH1N1	[25,34,37,38,43,48,52,62,74,84,86,87]
Seasonal influenza and Tdap	[27,28,40,55,58,92]
Seasonal influenza, Tdap, other*	[68,78]
Seasonal influenza, pH1N1, Tdap,other*	[66]
Study design
Prospective cohort	[56,57,96]
Retrospective cohort	[54,75,84,85,89,93]
Focus groups/interviews	[31,61,67,69]
Randomized control trials	[40,50,51,53,65,70,71,81]
Non-randomized control trials	[58,63,68,72,73,76,77,90,91,95]
Secondary data analysis	[23–25,27,33,34,37,38,41,60,64]
Surveys	[26,28–30,32,35,36,39,42–49,52,55,59,62,66,74,78–80,82,83,86–88,92,94,97]
Study population
Pregnant women only	[23–25,27,28,31,33–41,43–47,49–57,59–61,63–65,67–72,75,77,80–82,84–93,96,97]
Healthcare providers (HCP) only	[26,29,30,32,48,58,62,66,74,79,83]
Pregnant women and HCPs	[42,73,76,78,94,95]

^*“Other” refers to vaccines not routinely recommended for pregnant women, such as pneumococcal or HPV vaccines.