What's up with catch‐up? No evidence of population‐level catch‐up growth in children under 5 years of age when using height‐for‐age difference (HAD) instead of height‐for‐age z‐scores (HAZ)

Studies conducted in past decades showed little or no population-level linear catch-up growth (defined as reductions in absolute height deficit) in children after 2 y of age. Recent studies, howeve...