Table 2.
Bivariate analysis of maternal demographics and receipt of antepartum Tdap vaccine
| Characteristic | Vaccinated N = 736 n (%) | Not vaccinated N = 835 n (%) | Unadjusted ORa for not vaccinated (95% CI) | p-value* |
|---|---|---|---|---|
| Race/Ethnicity | 0.0003 | |||
| White non-Hispanic | 266 (48.9%) | 278 (51.1%) | – | |
| Black non-Hispanic | 118 (43.1%) | 156 (56.9%) | 1.26 (0.94–1.69) | |
| Asian non-Hispanic | 152 (57.4%) | 113 (42.6%) | 0.71 (0.53–0.96) | |
| Hispanic | 112 (39.7%) | 170 (60.3%) | 1.45 (1.08–1.94) | |
| All other non-Hispanic | 55 (42.0%) | 76 (58.0%) | 1.32 (0.90–1.94) | |
| Age group (years) | 0.0077 | |||
| 18–24 | 58 (36.5%) | 101 (63.5%) | – | |
| 25–34 | 441 (49.8%) | 445 (50.2%) | 0.58 (0.41–0.82) | |
| ≥ 35 | 202 (46.2%) | 235 (53.8%) | 0.67 (0.46–0.97) | |
| Received prenatal care during first trimester | 0.14 | |||
| Yes | 681 (47.6%) | 749 (52.4%) | 0.73 (0.48–1.11) | |
| No | 40 (40.0%) | 60 (60.0%) | – | |
| Primiparous | 0.12 | |||
| Yes | 308 (49.5%) | 314 (50.5%) | 0.85 (0.69–1.04) | |
| No | 415 (45.4%) | 498 (54.6%) | – | |
| Educational level | 0.02 | |||
| High School diploma or equivalent or less | 93 (49.0%) | 97 (51.0%) | – | |
| Associate or bachelor degree | 382 (44.0%) | 486 (56.0%) | 1.22 (0.89–1.67) | |
| More than bachelor degree | 239 (52.1%) | 220 (47.9%) | 0.88 (0.63–1.24) | |
| Health insurance type | < 0.0001 | |||
| Any private | 57 (50.7%) | 503 (49.3%) | – | |
| Public, no private | 177 (38.8%) | 279 (61.2%) | 1.62 (1.29–2.03) | |
| Household income | < 0.0001 | |||
| < $25,000 | 42 (34.4%) | 80 (65.6%) | – | |
| $25,000-$49,999 | 83 (39.2%) | 129 (60.8%) | 0.82 (0.51–1.30) | |
| $50,000-$74,999 | 72 (40.0%) | 108 (60.0%) | 0.79 (0.49–1.27) | |
| $75,000-$149,999 | 209 (52.1%) | 192 (47.9%) | 0.48 (0.32–0.74) | |
| $150,000 or more | 151 (55.3%) | 122 (44.7%) | 0.42 (0.27–0.66) | |
| Survey language | 0.41 | |||
| English | 731 (47.0%) | 826 (53.0%) | – | |
| Spanish | 5 (35.7%) | 9 (64.3%) | 1.59 (0.53–4.78) | |
*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)