Table 6 Results of regression models predicting waist-to-height ratio, body mass index, and obesity from randomly selected subset of the sibling pair sample, n = 856, Add Health Study 1994–2008

Intercept

0.415

0.067

<0.0001

19.782

5.060

<0.0001

0

0

0

Sex

0.042

0.007

<0.0001

0.564

0.524

0.282

1.127

(0.83, 1.53)

0.439

Age

−0.001

0.002

0.665

−0.045

0.147

0.762

0.993

(0.91, 1.08)

0.863

Breastfeeding

−0.025

0.008

0.001

−1.604

0.576

0.005

0.695

(0.50, 0.97)

0.033

Birthweight >2500 g

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Birthweight <2500 g

0.006

0.010

0.524

0.174

0.749

0.816

1.213

(0.80, 1.85)

0.369

Birthweight Missing

0.011

0.019

0.563

0.988

1.460

0.499

1.129

(0.49, 2.58)

0.774

Parent nonsmoker

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Parent smoker

0.005

0.010

0.619

0.318

0.784

0.685

0.955

(0.61, 1.50)

0.840

Parent smoking missing

0.005

0.010

0.625

0.724

0.726

0.319

0.998

(0.66, 1.52)

0.994

Non-Hispanic African American

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Reference

Non-Hispanic White

−0.022

0.030

0.455

−2.317

2.228

0.299

0.382

(0.11, 1.37)

0.140

Non-Hispanic Asian/Native American

0.022

0.053

0.682

2.978

3.954

0.452

0.378

(0.3, 4.90)

0.456

Hispanic

−0.034

0.028

0.227

−2.587

2.138

0.227

0.594

(0.17, 2.03)

0.406

Behavioral risk score 4_1

−0.013

0.004

0.001

−0.534

0.305

0.080

0.827

(0.69, 0.99)

0.044

Behavioral risk score 4_2

0.000

0.004

0.990

−0.044

0.328

0.894

1.038

(0.85, 1.27)

0.713

Behavioral risk score 4_3

0.003

0.006

0.616

0.296

0.419

0.480

1.174

(0.92, 1.50)

0.200

Parent socioeconomic status

−0.017

0.008

0.025

−0.975

0.567

0.086

0.653

(0.47, 0.91)

0.011

Maternal obesity

0.039

0.008

<0.0001

3.339

0.619

<0.0001

2.433

(1.72, 3.45)

<0.0001

Genetic risk score

0.005

0.001

<0.0001

0.412

0.080

<0.0001

1.079

(1.03, 1.13)

0.001

Ancestry principal component 1

0.575

0.599

0.338

36.065

45.094

0.424

0

0

0

Ancestry principal component 2

−0.416

0.398

0.297

−8.198

29.971

0.785

0

0

0

Ancestry principal component 3

0.982

0.237

<0.001

67.069

17.867

<0.001

0

0

0

Ancestry principal component 4

0.008

0.164

0.961

4.257

12.316

0.730

0

0

0

Ancestry principal component 5

0.346

0.205

0.092

29.949

15.419

0.052

0

0

0