Total | Maternal age | |||
---|---|---|---|---|
n =23 772 | ≤39 years n = 15 569 | ≥40 years n = 8203 | ||
n (%) | n (%) | n (%) | p-value | |
Maternal age | NA | |||
≤39 years | 15 569 (65.5) | - | - | |
≥40 years | 8203 (34.5) | - | - | |
Civil status | <.001 | |||
Married/cohabiting | 20 767 (87.4) | 13 877 (89.1) | 6890 (84.0) | |
Single status at registration | 3005 (12.6) | 1692 (10.9) | 1313 (16.0) | |
Maternal educational level | <.001 | |||
Elementary | 2611 (11.2) | 1948 (12.7) | 663 (8.3) | |
High school | 6245 (40.7) | 6245 (40.7) | 2951 (36.8) | |
College/University | 7156 (46.6) | 7156 (46.6) | 4400 (54.9) | |
Nicotine use during pregnancy | <.001 | |||
No | 20 289 (90.0) | 13 268 (89.5) | 7021 (91.2) | |
Yes | 2242 (10.0) | 1564 (10.5) | 678 (8.8) | |
Gender | .772 | |||
Boy | 12 361 (52.0) | 8085 (51.9) | 4276 (52.1) | |
Girl | 11 411 (48.0) | 7484 (48.1) | 3927 (47.9) | |
Assisted reproductive technologya | <.001 | |||
No | 22 577 (95.0) | 15 095 (97.0) | 7482 (91.2) | |
Yes | 1195 (5.0) | 474 (3.0) | 721 (8.8) | |
Gestational age | .020 | |||
Born at term | 22 185 (93.4) | 14 573 (93.7) | 7612 (92.9) | |
Born pretermb | 1570 (6.6) | 986 (6.3) | 584 (7.1) | |
Birthweight | .013 | |||
Normal birthweight | 22 611 (95.3) | 14 846 (95.5) | 7765 (94.8) | |
Low birthweightc | 1122 (4.7) | 696 (4.5) | 426 (5.2) | |
Size for gestational age | <.001 | |||
Average for gestational age | 22 273 (93.7) | 15 288 (98.2) | 7978 (97.3) | |
Small for gestational age | 506 (2.1) | 281 (1.8) | 225 (2.7) | |
Hospitalizations | ||||
Outpatient (median/IQR) | 2.00/5.00 | 2.00/5.00 | 2.00/5.00 | .114 |
Inpatient (median/IQR) | 0.00/1.00 | 0.00/1.00 | 0.00/1.00 | .007 |
Total (median/IQR) | 3.00/6.00 | 3.00/6.00 | 3.00/5.00 | .041 |
Outpatient visits | .743 | |||
0-10 | 21 046 (88.6) | 13 776 (88.5) | 7270 (88.6) | |
11- | 2726 (11.5) | 1793 (11.5) | 933 (11.4) | |
Inpatient visits | .203 | |||
0-1 | 20 893 (87.9) | 13 653 (87.7) | 7240 (88.6) | |
2- | 2879 (12.1) | 1916 (12.3) | 963 (11.7) |