Concurrent validity of the Alberta Infant Motor Scale to detect delayed gross motor development in preterm infants: A comparative study with the Bayley III

Dev Neurorehabil. 2018 Aug;21(6):408-414. doi: 10.1080/17518423.2017.1323974. Epub 2017 May 24.


Objective: To investigate the concurrent validity of AIMS in relation to the gross motor subtest of the Bayley Scale III/GM in preterm infants.

Methods: A total of 159 gross motor development assessments were performed with the AIMS and Bayley-III/GM. Linear regression was used to assess the correlation between AIMS and Bayley-III/GM scores. The intra-class correlation coefficient (ICC) and the Bland-Altman plot were used to analyze intra- and inter-rater reliability.

Results: There was a prevalence of delayed gross motor development of 20.8% according to the Bayley-III/GM, and 11.9% for the 5th percentile and 21.4% for the 10th percentile of AIMS. A good correlation of AIMS with Bayley-III/GM scores and intra- and inter-rater reliability was encountered in this study.

Conclusion: AIMS proved very capable of detecting delayed gross motor development in preterm infants when compared with the Bayley-III/GM. The 10th percentile of AIMS provided the best combination of indicators, with greater specificity.

Keywords: Alberta infant motor scale Child development; developmental assessment; premature infant.

Publication types

  • Comparative Study

MeSH terms

  • Developmental Disabilities / diagnosis*
  • Female
  • Humans
  • Infant
  • Infant, Newborn
  • Infant, Premature / growth & development
  • Infant, Premature / physiology*
  • Male
  • Motor Skills*
  • Neurologic Examination / methods*
  • Neurologic Examination / standards
  • Reproducibility of Results