Reference curves, expressed as standard deviation scores (SDS) by age,
derived from nl1997. Used by plot_stadia to
draw the percentile lines on a puberty stadia plot.
Format
A list with six components, one per pubertal stage variable:
gen, phb, tv, bre, phg and
men. Each component is a matrix whose first column is
age and whose remaining columns hold the SDS curve for each
stage.
Source
Derived from nl1997; see
data-raw/R/create_references.R.