Fig. 8
From: Insight into human pubertal growth by applying the QEPS growth model
Scatterplot showing the relationship between AgeP50 CI and relative pubertal age (standard deviation scores of AgeP50). Relative pubertal age is shown as AgeP50 SDS , SD-scores of AgeP50 (age at 50% of the P-function), for girls (red circles), for boys (blue crosses) in the study population (revealing that early and late puberty can be defined as ±2 SD-scores from mean age of AgeP50), are related to the confidence interval (CI) of AgeP50 (AgeP50 CI ). For girls; AgeP50 CI  = 0.547 + 0.0392 x AgeP50 SDS , adjusted r2 = 0.0300. For boys; AgeP50 CI  = 0.430 + 0.0186 x AgeP50 SDS , adjusted r2 = 0.0126