Table 2 The relationship between the type of vaccination, the number of vaccine doses, as well as the time of vaccination and miscarriage in pregnant women referring to comprehensive health service centers (n-610)
Miscarriage Variable | Not occurred | occurred | Odds ratio* (confidence interval 95%) | P value | |
|---|---|---|---|---|---|
vaccination type | Unvaccinated (n-330) Sinopharm (n-225) Other vaccines (n-21) Pre-pregnancy vaccine (n-34) | 291 (88.8) 213 (94.7) 20 (95.2) 27 (79.4) | 39 (11.8) 12 (5.3) 4 (4.8) 7 (20.6) | 1.000 0.376 (0.188–0.750) 0.320 (0.041–2.491) 2.266 (0.899–5.712) | 0.003 |
number of vaccine doses during pregnancy | Unvaccinated (n-364) One dose (n-91) Two dose (n-139) Three dose (n-16) | 318 (87.4) 79 (86.8) 138 (99.3) 16 (100) | 46 (12.6) 12 (13.2) 1 (0.7) 0 | 1.000 1.022 (0.505–2.070) 0.041 (0.005–0.301) - | 0.019 |
timing of vaccination during pregnancy | Unvaccinated (n-364) At least one dose in the first trimester (n-102) At least one dose in the second trimester (n-120) At least one dose in the third trimester (n-24) | 318 (87.4) 90 (88.2) 119 (99.2) 24 (100) | 46 (12.6) 12 (11.8) 1 (0.8) 0 | 1.000 0.818 (0.407–1.643) 0.048 (0.006–0.359) - | 0.031 |