'Low-normal' motor skills in infants at high risk for poor developmental outcomes: A prevalence and prognostic study.

High prevalence of 'low-normal' motor skill exists in high-risk infants. Clinical motor assessment validly identifies infants with motor impairment. Minimal motor impairment in high-risk infants is prognostic of general development. High-risk infants with 'low-normal' motor skills may warrant early intervention. Griffiths Scales of Child Development, Third Edition assessment at 12-months age may under-identify motor difficulties.