Table 4.
Bivariate analysis of maternal health beliefs influencing her decision to receive antepartum Tdap vaccine
| Characteristic | Vaccinated N = 736 n (%) | Not vaccinated N = 835 n (%) | Unadjusted ORa for not vaccinated (95% CI) | p-value* |
|---|---|---|---|---|
| General questions about participants’ perceptions of vaccine safety | ||||
| I worry about the safety of vaccine IN GENERAL | < 0.0001 | |||
| Disagree | 403 (54.9%) | 331 (45.1%) | ||
| Agree | 318 (39.5%) | 487 (60.5%) | 1.86 (1.52–2.28) | |
| It is dangerous for pregnant women to get vaccines | < 0.0001 | |||
| Disagree | 632 (50.9%) | 609 (49.1%) | – | |
| Agree | 89 (30.1%) | 207 (69.9%) | 2.41 (1.84–3.17) | |
| I feel confident asking my OB/GYN provider about vaccines | 0.0008 | |||
| Disagree | 62 (35.0%) | 115 (65.0%) | – | |
| Agree | 665 (48.5%) | 705 (51.5%) | 0.57 (0.41–0.79) | |
| I generally do what my OB/GYN provider recommends | < 0.0001 | |||
| Disagree | 71 (28.5%) | 178 (71.5%) | – | |
| Agree | 653 (50.4%) | 664 (49.6%) | 0.39 (0.9–0.53) | |
| Questions based on health belief model | ||||
| I worry that I could give pertussis to my baby | < 0.0001 | |||
| Disagree | 212 (39.3%) | 327 (60.7%) | – | |
| Agree | 488 (52.2%) | 446 (47.8%) | 0.59 (0.48–0.74) | |
| Pregnant women should be concerned about the possibility of pertussis in their babies | 0.0002 | |||
| Disagree | 45 (32.6%) | 93 (67.4%) | ||
| Agree | 658 (49.3%) | 676 (50.7%) | 0.50 (0.34–0.72) | |
| The Tdap (pertussis) vaccine is a good way to protect the health of newborn babies | < 0.0001 | |||
| Disagree | 21 (18.4%) | 93 (81.6%) | ||
| Agree | 685 (50.5%) | 671 (49.5%) | 0.22 (0.14–0.36) | |
| My family would probably think getting a Tdap (pertussis) vaccine is a good idea | < 0.0001 | |||
| Disagree | 48 (23.6%) | 155 (76.4%) | – | |
| Agree | 653 (51.3%) | 619 (48.7%) | 0.29 (0.21- 0.41) | |
| I felt that I had enough information about the Tdap (pertussis) vaccine to decide about receiving it | < 0.0001 | |||
| Disagree | 55 (18.6%) | 240 (81.4%) | – | |
| Agree | 649 (54.9%) | 533 (45.1%) | 0.19 (0.14–0.26) | |
| Pregnant women should get the Tdap (pertussis) vaccine | < 0.0001 | |||
| Disagree | 36 (15.2%) | 201 (84.8%) | – | |
| Agree | 664 (54.2%) | 560 (45.8%) | 0.15 (0.10–0.22) | |
| Getting myself vaccinated with the Tdap (pertussis) vaccine will help keep my baby from getting pertussis | < 0.0001 | |||
| Disagree | 27 (15.2%) | 150 (84.8%) | – | |
| Agree | 677 (52.7%) | 607 (47.3%) | 0.16 (0.11–0.25) | |
| I worry about the safety of the Tdap (pertussis) vaccine | < 0.0001 | |||
| Disagree | 424 (47.1%) | 319 (42.9%) | – | |
| Agree | 279 (38.6%) | 444 (61.4%) | 2.12 (1.72–2.61) | |
| I worry that getting the Tdap (pertussis) vaccine will not protect my baby from getting pertussis | < 0.0001 | |||
| Disagree | 528 (53.3%) | 463 (46.7%) | – | |
| Agree | 173 (37.5%) | 288 (62.5%) | 1.90 (1.51–2.38) | |
| It would be really bad if my baby got pertussis | 0.24 | |||
| Disagree | 40 (41.7%) | 56 (58.3%) | – | |
| Agree | 650 (47.8%) | 709 (52.2%) | 0.78 (0.51–1.18) | |
| My friends would probably think getting a Tdap (pertussis) vaccine is a good idea | < 0.0001 | |||
| Disagree | 66 (31.3%) | 145 (68.7%) | - | |
| Agree | 631 (50.6%) | 615 (49.4%) | 0.44 (0.32–0.61) | |
| It would be really bad if I got pertussis DURING my pregnancy | 0.37 | |||
| Disagree | 93 (44.7%) | 115 (55.3%) | – | |
| Agree | 605 (48.1%) | 653 (51.9%) | 0.87 (0.65–1.17) | |
| Getting myself vaccinated with the Tdap (pertussis) vaccine will help keep me from getting pertussis | < 0.0001 | |||
| Disagree | 28 (20.0%) | 112 (80.0%) | – | |
| Agree | 664 (50.5%) | 650 (49.5%) | 0.24 (0.16–0.38) | |
| I worry that someone besides me will give my baby pertussis | 0.92 | |||
| Disagree | 186 (47.6%) | 205 (52.4%) | – | |
| Agree | 512 (47.8%) | 558 (52.2%) | 0.99 (0.78–1.25) | |
| It would be really bad if I got pertussis soon AFTER my pregnancy | 0.09 | |||
| Disagree | 59 (40.7%) | 86 (59.3%) | – | |
| Agree | 637 (48.2%) | 684 (51.8%) | 0.74 (0.52–1.04) | |
Dashed boxes are referent values
*p-value is based on Wald Chi-square test from logistic regression
aUnadjusted 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)