Using the Alberta Infant Motor Scale (AIMS) to Screen for Motor Delay in Former Preterm Infants: A Validation Study
Preterm infants require close surveillance for gross motor delay after neonatal discharge. The Bayley Scales of Infant Development, 3rdedition (Bayley-III) is used widely in research settings, but is too resource intensive for routine clinical use. The Alberta Infant Motor Scale (AIMS) is an alternative test of motor development that can be administered by a range of providers, but little is known about its validity in the preterm population. The purpose of this study was to validate the AIMS as a measure of motor development in preterm infants ≤32 weeks' gestation, as compared with the Bayley-III.
We studied 57 infants ≤32 weeks' gestation who were seen in a tertiary children's hospital-based high risk infant follow-up program. Neonatologists performed the AIMS and physical therapists performed the Bayley-III motor scale. We calculated test characteristics of the AIMS to detect children with a Bayley-III motor score <85 for corrected age.
Median (range) gestational age was 28 (23, 32) weeks. Median (range) corrected age at assessment was 6 (2, 12) months. 12 (21%) had an AIMS score <10th percentile and 11(19%) had a Bayley-III motor score <85. The AIMS percentile correlated strongly with the Bayley-III motor composite score (Spearman r=0.83, p<0.001). Using an AIMS cutoff of <10th percentile, we detected 10 (90.9%) of 11 children with a low Bayley-III motor score. Further, of the 12 children with an AIMS score <10thpercentile, 10 (83%) had a low Bayley-III score. Other test characteristics are shown in the Table.
|Test characteristic||95% Confidence Interval|
|Positive Predictive Value||83.3%||(51.1%, 97.4%)|
|Negative Predictive Value||97.7%||(88.1%, 99.6%)|
These results suggest that the AIMS is a valid measure of motor development in preterm infants, and may be useful in a clinical settings as a routine screening test to detect preterm infants with motor delay.
- Copyright © 2017 by the American Academy of Pediatrics