Fig 1.
Simulated population for testing.
Distribution of age and height observations for the randomly simulated cohort of three sub-population groups.
Fig 2.
WFA z-score comparison for first stage.
(A) WFA Z-score determination and (B) residuals comparison for the three models on 8694 data points from the CDC data set.
Fig 3.
WFA z-score residuals for first stage.
Z-score comparison for the three methods on 8694 WFA data points in CDC tables. Horizontal axis is for CDC tables’ z-score value. Calculated values (z-score determination in the vertical axis) are in red for WHO method, green for CDC-LMS method and blue for GPR method. Black slope for perfect fit.
Fig 4.
Gender-age influence in z-score estimation.
Z-score residuals comparison for CDC-LMS and GRP methods for the 8694 WFA data points in CDC tables. Horizontal axis represents age of subjects in months. Residuals, calculated as standard z-score minus the calculated z-score for each method, is displayed in the vertical axis.
Fig 5.
Comparative scatter plot of the calculated z-score for CDC-LMS method and the GPR method on the simulated population.
Table 1.
Descriptive values of stage 3 evaluation.
Table 2.
Mean and standard deviation of the z-score values calculates with CDC-LMS and GPR methods.
Fig 6.
Z-score comparison for third stage.
Differences between z-score determination based on CDC-LMS and GPR methods with real data (n = 731 physical explorations).
Fig 7.
Weight determination for males of z-score in stage 3.
Comparison of WFA z-score determination between CDC-LMS and GPR methods for males (n = 112). Green crosses are for determinations with less than 5% of error with respect to the CDC tables value. Red crosses are for determinations with an error above 5%. In blue, CDC standard growth curves.
Fig 8.
Height determination for males of z-score in stage 3.
Comparison of HFA z-score determination between CDC-LMS and GPR methods for males (n = 112). Green crosses are for determinations with less than 5% of error with respect to the CDC tables’ value. Red crosses are for errors above 5%. In blue, CDC standard growth curves.