Table 3 The effect of the maternal migrant status on the rate of PTB and LBW births stratified by maternal age, infant sex, and delivery mode
variable | Maternal migrant status | PTB | LBW | ||||
|---|---|---|---|---|---|---|---|
n | % | OR adj (95%CI) | n | % | OR adj (95%CI) | ||
By maternal age | |||||||
16 ∽ 24 | Group 1 | 4592 | 5.22 | 1.00 | 5008 | 5.69 | 1.00 |
Group 2 | 28,445 | 4.92 | 0.948 (0.918, 0.979) | 31,342 | 5.42 | 0.960 (0.931, 0.990) | |
Group 3 | 19,276 | 4.72 | 0.897 (0.867, 0.927) | 18,792 | 4.60 | 0.796 (0.771, 0.822) | |
25 ∽ 29 | Group 1 | 12,643 | 4.93 | 1.00 | 11,691 | 4.56 | 1.00 |
Group 2 | 51,302 | 4.70 | 0.949 (0.930, 0.968) | 50,190 | 4.59 | 1.007 (0.987, 1.028) | |
Group 3 | 25,977 | 4.18 | 0.840 (0.822, 0.858) | 21,195 | 3.41 | 0.738 (0.721, 0.755) | |
30 ∽ 34 | Group 1 | 12,918 | 5.75 | 1.00 | 10,495 | 4.68 | 1.00 |
Group 2 | 39,928 | 5.40 | 0.935(0.916, 0.954) | 33,834 | 4.58 | 0.978 (0.956, 1.000) | |
Group 3 | 24,583 | 5.08 | 0.877 (0.858, 0.896) | 18,156 | 3.75 | 0.856 (0.776, 0.815) | |
35 ∽ 39 | Group 1 | 7406 | 7.59 | 1.00 | 5494 | 5.63 | 1.00 |
Group 2 | 21,965 | 6.06 | 0.911 (0.886,0.936) | 17,280 | 5.47 | 0.971 (0.941,1.002) | |
Group 3 | 12,185 | 6.75 | 0.882 (0.856,0.909) | 8622 | 4.78 | 0.842 (0.813,0.871) | |
Male 40 ∽ 50 | Group 1 | 2358 | 10.1 | 1.00 | 1644 | 7.02 | 1.00 |
Group 2 | 5840 | 8.9 | 0.872 (0.829,0.917) | 4394 | 6.69 | 0.950 (0.895,1.007) | |
Group 3 | 3429 | 8.9 | 0.871 (0.825,0.921) | 2335 | 6.05 | 0.853 (0.799,0.911) | |
Female By infant sex | |||||||
male | Group 1 | 23,297 | 6.32 | 1.00 | 16,780 | 4.55 | 1.00 |
Group 2 | 86,880 | 5.81 | 0.946 (0.932, 0.960) | 65,950 | 4.41 | 0.981 (0.964, 0.998) | |
Group 3 | 49,783 | 5.36 | 0.860 (0.846, 0.874) | 33,615 | 3.62 | 0.784 (0.769, 0.799) | |
female | Group 1 | 16,658 | 5.18 | 1.00 | 17,578 | 5.47 | 1.00 |
Group 2 | 60,785 | 4.68 | 0.943 (0.926, 0.960) | 71,282 | 5.49 | 1.023 (1.005, 1.040) | |
Group 3 | 36,053 | 4.47 | 0.882 (0.865, 0.898) | 35,835 | 4.44 | 0.800 (0.785, 0.815) | |
By delivery mode | |||||||
Vaginal delivery | Group 1 | 21,367 | 4.77 | 1.00 | 18,946 | 4.23 | 1.00 |
Group 2 | 89,587 | 4.60 | 0.973 (0.959, 0.988) | 85,009 | 4.36 | 1.024 (1.007, 1.040) | |
Group 3 | 47,026 | 4.12 | 0.872 (0.858, 0.887) | 39,080 | 3.43 | 0.793 (0.779, 0.807) | |
Cesarean | Group 1 | 18,619 | 7.68 | 1.00 | 15,438 | 6.36 | 1.00 |
Group 2 | 58,110 | 6.88 | 0.906 (0.891, 0.922) | 52,253 | 6.18 | 0.971 (0.953, 0.989) | |
Group 3 | 38,834 | 6.52 | 0.866 (0.850, 0.882) | 30,393 | 5.10 | 0.791 (0.775, 0.807) | |