Table 1.
Characteristics of pregnant women with and without vaccination
| Total (n = 6576) | Vaccination (−) (n = 1179) | Vaccination (+) (n = 5397) | p‐Value a | ||||
|---|---|---|---|---|---|---|---|
| n | % | n | % | n | % | ||
| Age group | |||||||
| <20 years | 18 | 0.3 | 10 | 0.8 | 8 | 0.1 | <0.001 |
| 20–29 | 1837 | 27.9 | 373 | 31.6 | 1464 | 27.1 | |
| 30–39 | 4202 | 63.9 | 707 | 60.0 | 3495 | 64.8 | |
| ≧40 | 519 | 7.9 | 89 | 7.5 | 430 | 8.0 | |
| Occupation | |||||||
| Housewife | 1514 | 23.0 | 296 | 25.1 | 1218 | 22.6 | <0.001 |
| Employee | 2470 | 37.6 | 423 | 35.9 | 2047 | 37.9 | |
| Public servant | 449 | 6.8 | 68 | 5.8 | 381 | 7.1 | |
| Self employed | 218 | 3.3 | 57 | 4.8 | 161 | 3.0 | |
| Education | 148 | 2.3 | 22 | 1.9 | 126 | 2.3 | |
| Health care workers | 889 | 13.5 | 114 | 9.7 | 775 | 14.4 | |
| Part‐time | 764 | 11.6 | 164 | 13.9 | 600 | 11.1 | |
| Others | 124 | 1.9 | 35 | 3.0 | 89 | 1.6 | |
| Weeks of gestation b | |||||||
| Early pregnancy (≤15 weeks) | 1456 | 22.2 | 358 | 30.4 | 1098 | 20.4 | <0.001 |
| Mid‐pregnancy (16–27 weeks) | 2177 | 33.2 | 359 | 30.5 | 1818 | 33.7 | |
| Late pregnancy (≥28 weeks) | 2933 | 44.7 | 460 | 39.1 | 2473 | 45.9 | |
| Primipara | |||||||
| Yes | 3780 | 57.5 | 655 | 55.6 | 3125 | 57.9 | 0.769 |
| No | 2796 | 42.5 | 524 | 44.4 | 2272 | 42.1 | |
| Fetal number | |||||||
| Single | 6527 | 99.3 | 1171 | 99.3 | 5356 | 99.2 | 0.140 |
| Twins or triplets | 49 | 0.7 | 8 | 0.7 | 41 | 0.8 | |
| Pregnancy | |||||||
| Natural | 5540 | 84.2 | 1014 | 86.0 | 4526 | 83.9 | 0.123 |
| Artificial insemination | 224 | 3.4 | 31 | 2.6 | 193 | 3.6 | |
| In vitro fertilization | 812 | 12.3 | 134 | 11.4 | 678 | 12.6 | |
| Complications during pregnancy b | |||||||
| All | 1655 | 25.8 | 275 | 24.0 | 1380 | 26.2 | 0.116 |
| COVID‐19 | 42 | 0.7 | 18 | 1.6 | 24 | 0.5 | <0.001 |
| Gestational hypertension | 47 | 0.7 | 10 | 0.9 | 37 | 0.7 | 0.544 |
| Gestational diabetes mellitus | 257 | 4.0 | 37 | 3.2 | 220 | 4.2 | 0.136 |
| Anemia | 786 | 12.3 | 128 | 11.1 | 658 | 12.5 | 0.209 |
| Threatened premature delivery | 596 | 9.3 | 109 | 9.5 | 487 | 9.2 | 0.791 |
| Others | 180 | 2.8 | 22 | 1.9 | 158 | 3.0 | 0.044 |
| Diseases under treatment b | |||||||
| All | 1071 | 17.6 | 157 | 14.7 | 914 | 18.2 | 0.007 |
| Asthma | 131 | 2.1 | 20 | 1.9 | 111 | 2.2 | 1.000 |
| Malignancy | 3 | 0.0 | 0 | 0.0 | 3 | 0.1 | 0.425 |
| Thyroid disease | 226 | 3.7 | 31 | 2.9 | 195 | 3.9 | 0.125 |
| Autoimmune disease | 33 | 0.5 | 5 | 0.5 | 28 | 0.6 | 0.719 |
| Allergy | 292 | 4.8 | 34 | 3.2 | 258 | 5.1 | 0.007 |
| Inflammatory bowel disease | 25 | 0.4 | 3 | 0.3 | 22 | 0.4 | 0.467 |
| Hypertension | 24 | 0.4 | 5 | 0.5 | 19 | 0.4 | 0.596 |
| Diabetes mellitus | 30 | 0.5 | 5 | 0.5 | 25 | 0.5 | 0.901 |
| Heart disease | 7 | 0.1 | 2 | 0.2 | 5 | 0.1 | 0.354 |
| Kidney disease | 10 | 0.2 | 2 | 0.2 | 8 | 0.2 | 0.691 |
| Mental disorder | 118 | 1.9 | 16 | 1.5 | 102 | 2.0 | 0.252 |
| Others | 300 | 4.9 | 46 | 4.3 | 254 | 5.1 | 0.306 |
a
Using the chi‐squared test or Fisher's exact test
b
Missing values were excluded in the weeks of gestation (n = 10), complications during pregnancy (n = 160), and diseases under treatment (n = 482);
Note: Bold values presented in Tables represent statistically significant.