Table 2

Comparison of SITAR models applied to Demographic and Health Survey data from 145 surveys (64 countries) from 2000 to 2018

Model specificationFixed effectsRandom effectsBayesian Information CriteriaPercentage of variance explained
Boys’ height
 M1Absolute sizeAbsolute size14 29868.5
 M2* Absolute size+intensityAbsolute size+intensity12 47180.6
 M3Absolute size+timing+intensityAbsolute size+timing+intensityNo convergenceN/A
Girls’ height
 F1Absolute sizeAbsolute size14 25367.7
 F2* Absolute size+intensityAbsolute size +Intensity12 42180.2
 F3Absolute size+timing+intensityAbsolute size+timing+intensityNo convergenceN/A
  • Age in months was log transformed for all models; all models were fit using 4 df.

  • *Final model selected.

  • N/A, not applicable; SITAR, Super-Imposition by Translation And Rotation.