Table 2.

Clinical assessments used in infants and young boys with DMD.

Test	Age range	Domains	Test Administration	Time to administer
Bayley III Scales of Infant development	0–42 months	Cognition Language (receptive and expressive) Motor function (gross and fine).	Trained clinical evaluator	90–120 minutes
Adaptive Behavior Subtest of Bayley-III	0–42 months	Communication Community Use Functional Pre-Academic Home Living Health and Safety Leisure Self-Care Self-Direction Social Motor	Parent self-report	15–30 minutes
HMFSE	0–6 years*	Gross Motor	Trained clinical evaluator	20–30 minutes
North Star **	Ambulatory	Gross Motor	Trained clinical evaluator	10–15 minutes

^*The age range of the HMFSE is approximate as these skills are gained over time but typically developing children would have achieved all by six years.

^**The 17 activities tested with the North Star include standing (1), walking (2), standing up from a chair(3), standing on each leg (4, 5), climbing on a box step with each leg (6, 7), descending from box step with each leg (8, 9), getting to sitting(10), rising from the floor (11), lifting head(12), standing on heels (13), jumping (14), hopping on each leg (15, 16) and running 10 meters(17).