Background
Infants born preterm are at risk of various long-term neurodevelopmental problems, a risk that increases as gestational age decreases [The concurrent validity between the AIMS and the PDMS-2 has previously been examined in low birthweight infants in the United States and in high-risk infants in China [As part of a multicentre randomized controlled trial of parent-administrated physiotherapy before term age, the Norwegian Physiotherapy Study in Preterm Infants (the NOPPI) [The purpose of this study was to investigate the concurrent validity of the AIMS compared to the PDMS-2 (as the well-known instrument), in a group of high-risk infants in Norway, and to investigate the predictive validity of the two tests for atypical motor development at 24 months PTA.