Table 1 Baseline characteristics by infection before and after propensity score (PS) matching.
Covariate | Before PS match | After PS match | ||||
|---|---|---|---|---|---|---|
no infection | infection | p-value | no infection | infection | p-value | |
Maternal age | ||||||
<30 | 10353(76.43) | 7316(80.87) | <0.001 | 4407(81.90) | 4408(81.92) | 0.980 |
≥30 | 3193(23.57) | 1731(19.13) | 974(18.10) | 973(18.08) | ||
Maternal education | ||||||
<High school | 9999(72.86) | 6494(71.04) | 0.003 | 3854(71.62) | 3861(71.75) | 0.986 |
High school | 2600(18.95) | 1898(20.76) | 1080(20.07) | 1073(19.94) | ||
>High school | 1124(8.19) | 749(8.19) | 447(8.31) | 447(8.31) | ||
Wealth index | ||||||
Poor | 3180(28.87) | 2147(28.22) | 0.539 | 1506(27.99) | 1490(27.69) | 0.911 |
Moderate | 5476(49.72) | 3795(49.88) | 2611(48.52) | 2611(48.52) | ||
Rich | 2357(21.4) | 1667(21.91) | 1264(23.49) | 1280(23.79) | ||
Maternal passive smoking | ||||||
No | 10404(75.88) | 6382(69.97) | <0.001 | 3786(70.36) | 3786(70.36) | >0.999 |
Yes | 3307(24.12) | 2739(30.03) | 1595(29.64) | 1595(29.64) | ||
Maternal drinking | ||||||
No | 13613(99.08) | 9000(98.48) | <0.001 | 5343(99.29) | 5344(99.31) | 0.908 |
Yes | 127(0.92) | 139(1.52) | 38(0.71) | 37((0.69) | ||
Maternal folic acid supplement use | ||||||
No | 6614(48.1) | 4065(44.39) | <0.001 | 2423((45.03) | 2437(45.29) | 0.786 |
Yes | 7136(51.9) | 5092(55.61) | 2958((54.97) | 2944(54.71) | ||
Maternal taking medicine | ||||||
No | 13055(94.92) | 6048(66.07) | <0.001 | 4836(89.87) | 4836(89.87) | >0.999 |
Yes | 699(5.08) | 3106(33.93) | 545(10.13) | 545(10.13) | ||
Family history of birth defects | ||||||
No | 13664(99.31) | 9061(98.95) | 0.004 | 5356(99.54) | 5349(99.41) | 0.353 |
Yes | 95(0.69) | 96(1.05) | 25(0.46) | 32(0.59) | ||
Baby gender | ||||||
Male | 7554(59.74) | 5090(40.26) | 0.311 | 3021(56.14) | 2997(55.70) | 0.641 |
Female | 6201(60.4) | 4065(39.6) | 2360(43.86) | 2384(44.30) | ||
