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Table 4 Regression results for models constructed from sibling pair sample, n = 1179, Add Health Study 1994–2008

From: Breastfeeding is associated with waist-to-height ratio in young adults

  Waist-to-height ratio outcome* Body mass index outcome**
b SE P value b SE P value
Intercept 0.392 0.063 <0.0001 20.161 4.640 <0.0001
Sex 0.037 0.006 <0.0001 0.301 0.477 0.528
Age 0.000 0.002 0.838 −0.063 0.132 0.634
Breastfeeding −0.020 0.006 0.002 −1.049 0.473 0.027
Birthweight >2500 g Reference Reference Reference Reference Reference Reference
Birthweight <2500 g 0.001 0.008 0.927 −0.186 0.629 0.768
Birthweight Missing 0.006 0.017 0.726 0.384 1.261 0.761
Parent nonsmoker Reference Reference Reference Reference Reference Reference
Parent smoker 0.008 0.009 0.334 0.322 0.648 0.619
Parent smoking missing 0.007 0.008 0.375 0.686 0.598 0.251
Non-Hispanic African American Reference Reference Reference Reference Reference Reference
Non-Hispanic White −0.014 0.027 0.604 −1.634 2.004 0.415
Non-Hispanic Asian/Native American 0.025 0.047 0.589 3.625 3.452 0.294
Hispanic −0.023 0.026 0.382 −1.695 1.918 0.377
Behavioral risk score 4_1 0.016 0.004 <0.0001 0.757 0.265 0.004
Behavioral risk score 4_2 −0.001 0.004 0.787 −0.206 0.282 0.466
Behavioral risk score 4_3 −0.002 0.004 0.564 0.123 0.303 0.685
Parent socioeconomic status −0.010 0.006 0.100 −0.839 0.462 0.070
Maternal obesity 0.047 0.007 <0.0001 3.932 0.508 <0.0001
Genetic risk score 0.005 0.001 <0.0001 0.402 0.065 <0.0001
Ancestry principal component 1 0.273 0.544 0.617 10.394 40.325 0.797
Ancestry principal component 2 −0.392 0.348 0.261 −4.349 25.792 0.866
Ancestry principal component 3 0.769 0.215 <0.001 57.713 15.944 <0.001
Ancestry principal component 4 −0.034 0.150 0.822 0.989 11.076 0.929
Ancestry principal component 5 0.366 0.187 0.0505 32.468 13.836 0.0191
  1. b (Coefficient) SE (Standard Error)
  2. * R-Squared = 0.18
  3. ** R-Squared = 0.14