Fig 1.
Distribution of BMI by gender.
Fig 2.
Distribution of weight, with the linear and quadratic effects of height partialed out, by gender.
Fig 3.
Association between BMI and weight, with the linear and quadratic effects of height partialed out, by gender.
Table 1.
Descriptive statistics of body-mass index (BMI).
Table 2.
Fit statistics of the intraclass correlation mixture models under normal and skew-t distributions for BMI and height.
Table 3.
Descriptive statistics and twin correlations of BMI and height for the intraclass correlation mixture models.
Fig 4.
BMI density of the two latent classes by gender and zygosity.
Note. The densities of the single-class BMI are illustrated in dashed lines.
Fig 5.
Distribution of participants in normal and overweight class, stratified by BMI.
Fig 6.
Associations of BMI between twin pairs of the two latent classes by gender and zygosity.
Fig 7.
Distribution of height (in feet) between twin pairs by gender and zygosity.
Fig 8.
Associations of height (in feet) between twin pairs by gender and zygosity.