Table 5.

Bivariate analysis of maternal recall of obstetric provider actions and receipt of antepartum Tdap vaccine

Characteristic	Vaccinated N = 736 n (%)	Not vaccinated N = 835 n (%)	Unadjusted OR* for not vaccinated (95% CI)	p-value**
Did anyone at your OB/GYN office recommend you receive the Tdap vaccine DURING this most recent pregnancy?				< 0.0001
No	66 (13.6%)	420 (86.4%)	–
Yes	662 (62.5%)	397 (37.5%)	0.09 (0.07–0.13)
Did your OB/GYN offer to give you the vaccine in their office?				< 0.0001
No	120 (19.0%)	510 (81.0%)	–
Yes	610 (67.3%)	296 (32.7%)	0.11 (0.09–0.15)
Were you referred to a different location (e.g., Pharmacy, Health Clinic, etc.) to receive the Tdap vaccine?				0.14
No	626 (47.9%)	682 (52.1%)	–
Yes	98 (42.6%)	132 (57.4%)	1.24 (0.93–1.64)
Did you receive any written materials in your OB/GYN office describing the importance of the Tdap vaccine during your pregnancy?				< 0.0001
No	183 (25.4%)	536 (74.6%)	–
Yes	542 (66.2%)	77 (33.8%)	0.17 (0.14–0.22)

Dashed boxes are referent values

^*Unadjusted odds ratio (OR) > 1 reflects elements associated with increased odds of not receiving antepartum Tdap, while OR < 1 demonstrates decreased odds of non-receipt (i.e., more likely to receive antepartum Tdap vaccine)

^**p-value is based on Wald Chi-square test from logistic regression