Skip to main content

Table 3 Effect of maternal anxiety on birth weight

From: Maternal Anxiety and Infants Birthweight and Length of Gestation. A sibling design

  Crude Step1* Step2** Step3***
Beta [95% CI] Beta [95% CI] Beta [95% CI] Beta [95% CI]
Full cohort
 No Anxiety 0 [Reference] 0 [Reference] 0 [Reference] 0 [Reference]
 Week 17 -56.5 [-78.8, -34.2] -48.9 [-71.2, -26.6] -22 [-43.7, -0.4] -25.4 [-47.1, -3.8]
 Week 30 -83.1 [-106.7, -59.5] -71.4 [-94.9, -47.8] -44 [-66.7, -21.2] -47.8 [-70.6, -25.1]
 Both -116.6 [-146.3, -86.9] -99.2 [-128.8, -69.5] -58 [-86.8, -29.2] -63.8 [-92.6, -35]
 Sample size 91,165 91,165 91,165 91,165
Sibling cohort
 No Anxiety 0 [Reference] 0 [Reference] 0 [Reference] 0 [Reference]
 Week 17 -34.8 [-58.9, -10.7] -33.2 [-57.3, -9.1] -4.5 [-27.4, 18.5] -4.7 [-27.6, 18.3]
 Week 30 -57.5 [-88, -27] -56.9 [-87.5, -26.3] -27.7 [-56.9, 1.5] -27.9 [-57.2, 1.3]
 Both -139 [-184.5, -93.4] -134.8 [-180.4, -89.2] -33.5 [-77.8, 10.8] -33.1 [-77.4, 11.2]
 Sample size1 12,480 12,480 12,480 12,480
  1. *Adjusted for smoking and alcohol intake.
  2. **Adjusted for smoking, alcohol intake, parity, birth complication, child’s sex and preeclampsia.
  3. ***Adjusted for smoking, alcohol intake, parity, birth complication, child’s sex, preeclampsia, maternal age, education and marital status.
  4. 1 Number of sibling “pairs”.