Before revision:  We assess the potential magnitude of this bias by decomposing variation in HAZ from 1, 406,609 children from 63 low- and middle-income countries into two components ;
After revision:  We examine how universal cutoffs can underestimate stunting in specific regions around the world. Methods: Using a non-linear multi-level model, we decompose variation in height-for-age z-scores (HAZ) from 1, 406,609 children from 63 low- and middle-income countries into two components ;