Basic Motor Skills of Children With Down Syndrome: Creating a Motor Growth Curve

Peter E. M. Lauteslager, J. M. Volman*, Timo Lauteslager, Marlette E. Van den Heuvel, Joran Jongerling, Irene G. Klugkist

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


Purpose: To create a motor growth curve based on the Test of Basic Motor Skills for Children with Down Syndrome (BMS) and estimate the age of achieving BMS milestones. Methods: A multilevel exponential model was applied to create a motor growth curve based on BMS data from 119 children with Down syndrome (DS) aged 2 months to 5 years. Logistic regression was applied to estimate the 50% probability of achieving BMS milestones. Results: The BMS growth curve had the largest increase during infancy with smaller increases as children approached the predicted maximum score. The age at which children with DS have a 50% probability of achieving the milestone sitting was 22 months, for crawling 25 months, and for walking 38 months. Conclusions: The creation of a BMS growth curve provides a standardization of the gross motor development of children with DS. Physical therapists then may monitor a child's individual progress and improve clinical decisions.

Original languageEnglish
Pages (from-to)375-380
Number of pages6
JournalPediatric physical therapy
Issue number4
Publication statusPublished - Oct 2020
Externally publishedYes


  • Down syndrome
  • motor development
  • motor growth curve


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