2.4.1. Primary Outcome Measure: Hand Assessment for Infants (HAI)
HAI
The HAI is a criterion and norm-referenced valid and reliable tool to assess manual ability of each hand separately as well as both hands together in infants aged 3-12 months (corrected age) at risk of uCP [The Each Hand Sum Score (EaHS) is a score for the left and right hand separately (range 0-24), and the Both Hands Measure (BoHM) is the overall logit-based outcome measure of the HAI (range 0-100) [As there was only one trained and certified HAI assessor (AV) in the Sint Maartenskliniek, blinded scoring was not possible. To control for expectation bias, five randomly selected videos were scored by a second trained and certified HAI assessor (TS) from a different rehabilitation clinic in the Netherlands. Outcomes were discussed until consensus was reached.