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Table 1 Characteristics of full cohort

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=91,165 μ=3,610.3 s=542.3 μ=279.7 s=11.7
Maternal anxiety at week 17 (score)
 1-2, Light 80,233 3,615.1 540.2 279.8 11.7
 2-3 8,022 3,581.1 554.3 279.1 12.1
 3-4, Severe 1,362 3,529.9 573.0 277.6 12.9
 NA 1,548 3,583.5 545.7 279.0 12.0
Maternal anxiety at week 30 (score)
 1-2, Light 85,064 3,615.0 537.3 279.9 11.5
 2-3 4,690 3,559.4 572.9 278.5 13.2
 3-4, Severe 639 3,519.8 643.1 276.5 15.6
 NA 772 3,470.6 728.9 275.5 20.1
Maternal age
 <25 9,862 3,552.4 547.6 279.0 12.3
 25-29 30,223 3,592.8 533.2 279.7 11.6
 30-34 35,280 3,631.6 536.4 279.9 11.4
 >=35 15,800 3,632.0 564.9 279.6 12.2
Partner harmony (score)
 1-2, Good 64,618 3,602.6 540.2 279.8 11.8
 2-3 19,726 3,638.9 538.4 279.8 11.4
 3-4 3,977 3,646.6 537.8 279.6 11.2
 4-5 919 3,637.1 581.1 278.8 12.1
 5-6, Bad 359 3,518.4 570.4 278.8 11.5
 NA 1,566 3,476.8 617.3 278.0 14.8
Education
 University 4y+ 20,406 3,602.9 525.4 280.3 11.3
 College/University 3y 35,732 3,620.1 534.3 279.8 11.6
 College 1-2y 12,684 3,623.4 555.7 279.7 12.0
 Secondary school 17,720 3,595.2 566.3 278.8 12.3
 NA 4,623 3,588.3 542.6 279.8 12.0
Marital status
 Married/Partner 87,656 3,613.7 540.9 279.7 11.7
 Single 3,509 3,523.1 568.3 279.1 12.3
Parity
 0 41,316 3,505.5 535.4 279.9 12.5
 1 32,276 3,683.5 523.1 279.8 10.8
 2 13,754 3,725.8 541.4 279.4 11.1
 3 2,912 3,723.1 562.3 278.7 11.8
 4 907 3,661.1 601.8 276.5 13.1
Alcohol consumption during pregnancy
 Never 74,786 3,611.1 541.7 279.7 11.8
 1+/month 533 3,567.4 537.9 280.4 12.1
 NA 15,846 3,607.6 545.1 279.8 11.7
Smoking during pregnancy
 None 81,879 3,621.6 538.9 279.8 11.6
 Sometimes 4,018 3,570.9 554.5 279.9 12.3
 Daily 3,746 3,420.1 553.4 278.5 12.4
 NA 1,522 3,571.3 566.9 279.2 13.2
Birth complication
 No 66,220 3,627.8 546.0 280.1 11.9
 Yes 24,945 3,563.6 529.3 278.6 11.3
Child sex
 Girl 44,450 3,546.2 524.6 279.2 11.5
 Boy 46,715 3,671.2 551.7 280.2 12.0
 NA 87,792 3,624.7 524.6 280.1 11.2
Preeclampsia
 Yes 3,373 3,234.0 799.2 270.2 19.2
 No 80,233 3,615.1 540.2 279.8 11.7