Table 2 Characteristics of sibling sub-sample
From: Maternal Anxiety and Infants Birthweight and Length of Gestation. A sibling design
Count | Birthweight (in grams) | Gestational age (in days) | |||
|---|---|---|---|---|---|
Mean | SD | Mean | SD | ||
n=24,960 | μ=3,639.5 | s=523.0 | μ=280.0 | s=11.3 | |
Maternal anxiety at week 17 (score) | |||||
1-2, Light | 22,888 | 3,642.9 | 521.4 | 280.1 | 11.2 |
2-3 | 1,571 | 3,602.7 | 538.5 | 279.5 | 11.8 |
3-4, Severe | 219 | 3,598.8 | 510.1 | 278.7 | 11.0 |
NA | 282 | 3,596.6 | 563.2 | 279.1 | 12.0 |
Maternal anxiety at week 30 (score) | |||||
1-2, Light | 23,836 | 3,642.5 | 519.2 | 280.1 | 11.1 |
2-3 | 890 | 3,605.8 | 562.6 | 279.3 | 12.8 |
3-4, Severe | 104 | 3,489.5 | 575.4 | 276.6 | 14.6 |
NA | 130 | 3,444.3 | 767.5 | 274.0 | 22.3 |
Maternal age | |||||
<25 | 2,306 | 3,598.8 | 540.8 | 279.1 | 12.0 |
25-29 | 8,883 | 3,623.9 | 521.0 | 280.0 | 11.3 |
30-34 | 10,265 | 3,655.6 | 517.1 | 280.2 | 11.0 |
>=35 | 3,506 | 3,658.4 | 530.4 | 280.1 | 11.4 |
Partner harmony (score) | |||||
1-2, Good | 18,030 | 3,628.7 | 522.6 | 280.0 | 11.3 |
2-3 | 5,497 | 3,669.9 | 516.2 | 280.3 | 10.9 |
3-4 | 984 | 3,686.4 | 518.7 | 280.1 | 10.5 |
4-5 | 198 | 3,698.8 | 549.8 | 278.6 | 13.0 |
5-6, Bad | 47 | 3,577.9 | 470.7 | 280.7 | 9.4 |
NA | 204 | 3,501.4 | 660.7 | 276.8 | 16.8 |
Education | |||||
University 4y+ | 6,432 | 3,634.1 | 507.0 | 280.5 | 10.9 |
College/University 3y | 10,958 | 3,641.6 | 523.6 | 280.0 | 11.2 |
College 1-2y | 2,945 | 3,647.4 | 528.8 | 279.8 | 11.7 |
Secondary school | 3,572 | 3,635.8 | 541.7 | 279.3 | 11.6 |
NA | 1,053 | 3,640.2 | 531.7 | 280.5 | 11.4 |
Marital status | |||||
Married/Partner | 24,420 | 3,640.4 | 522.3 | 280.0 | 11.3 |
Single | 540 | 3,596.7 | 548.9 | 278.9 | 11.4 |
Parity | |||||
0 | 9,425 | 3,535.0 | 528.3 | 280.1 | 12.4 |
1 | 11,388 | 3,692.1 | 505.2 | 280.1 | 10.3 |
2 | 3,279 | 3,739.1 | 513.3 | 279.8 | 10.5 |
3 | 654 | 3,736.3 | 514.2 | 279.5 | 11.2 |
4 | 214 | 3,619.2 | 616.9 | 276.6 | 13.5 |
Alcohol consumption during pregnancy | |||||
Never | 21,072 | 3,641.0 | 521.0 | 280.0 | 11.2 |
1+/month | 97 | 3,602.8 | 559.2 | 281.5 | 13.5 |
NA | 3,791 | 3,632.0 | 532.8 | 280.0 | 11.5 |
Smoking during pregnancy | |||||
None | 23,251 | 3,646.5 | 521.3 | 280.0 | 11.2 |
Sometimes | 743 | 3,577.1 | 533.9 | 280.4 | 11.7 |
Daily | 589 | 3,442.7 | 528.1 | 278.6 | 12.0 |
NA | 377 | 3,637.3 | 529.2 | 279.9 | 13.0 |
Birth complication | |||||
No | 17,519 | 3,662.7 | 528.6 | 280.5 | 11.5 |
Yes | 7,441 | 3,584.8 | 505.3 | 279.0 | 10.7 |
Child sex | |||||
Girl | 12,172 | 3,579.4 | 504.2 | 279.5 | 10.9 |
Boy | 12,788 | 3,696.7 | 534.0 | 280.5 | 11.6 |
NA | 24,164 | 3,650.9 | 507.5 | 280.3 | 10.8 |
Preeclampsia | |||||
Yes | 796 | 3,292.1 | 796.2 | 270.8 | 18.8 |
No | 22,888 | 3,642.9 | 521.4 | 280.1 | 11.2 |