Methods
Pregnant women were randomized in the fall of 2013 to either receive or not receive weekly text messages. Women were told the messages would be about health-related behavior in pregnancy. Women randomized to the intervention group received two messages weekly for four consecutive weeks reinforcing that the influenza vaccine is recommended for all pregnant women and safe during pregnancy and breastfeeding. Women were contacted six weeks postpartum by study staff to determine if they had received the vaccine. Sample size calculation determined that 108 women were required in both groups to see a 75% increase in vaccination rates over baseline in the text message group compared to the controls.
Methods
Pregnant women were randomized in the fall of 2013 to either receive or not receive weekly text messages. Women were told the messages would be about health-related behavior in pregnancy. Women randomized to the intervention group received two messages weekly for four consecutive weeks reinforcing that the influenza vaccine is recommended for all pregnant women and safe during pregnancy and breastfeeding. Women were contacted six weeks postpartum by study staff to determine if they had received the vaccine. Sample size calculation determined that 108 women were required in both groups to see a 75% increase in vaccination rates over baseline in the text message group compared to the controls.
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