output: html_document: theme: readable

Figure 1

QQ plots of weightMZ (left), heightMZ (middle) and BMIMZ (right) among -19-year-olds in NHANES. The black points represent values high BIVs and the triangles, low BIVs; the grey points represent data for values that were considered to be biologically plausible based on the WHO cut-points. If the data were normally distributed, all points would fall on a diagonal line. In contrast, both weight and BMI were skewed to the right with very heavy tails. The distribution of height was much closer to that of a normal distribution.

f2 +  geom_point(data=dslb,cex=.z,shape=.s,color=.c) +
  geom_point(data=dslw,cex=.z,shape=.s,color=.c) + 
  geom_point(data=dslh,cex=.z,shape=.s, color=.c)

Figure 2

Lines represent the weighted, smoothed 85th, 95th and 99th percentiles of waist circumference (top), arm circumference (middle), and leg length (bottom) by sex (columns) and age for all children in NHANES 1999-2012 as calculated with quantile regression (35,36). The points in the top and middle panels represent the waist and arm circumferences of the 113 children who had a BMIMZ between 6 and 6.9, the triangles represent BMIMZ values = 7.0. The points in the bottom panel represent the leg lengths of the 63 children who had a heightMZ = 3.0.

f1 + geom_point(data=dmp1, color='black', 
                   aes(y=value, shape=1), size=2) +
     geom_point(data=dmp2, color='black', 
                aes(y=value, shape=17), size=2) +
     scale_shape_identity() + 
     labs(x='\nAge (years)', y='Value (cm)\n', linetype=.leg, shape=.leg,
          color=.leg)