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Table 1 Health state categorisation

From: Symptoms and impacts of aromatic l-amino acid decarboxylase (AADC) deficiency among individuals with different levels of motor function

Level of function

Health state

Unable to hold their head level for 8 seconds while rotating their head from side to side to follow a moving object

No motor function

Able to hold their head level for 8 seconds while rotating their head from side to side to follow a moving object

Head control

Can sit unsupported for 60 seconds

Sitting without support

Can take four alternating steps on the spot or forward, when supported by someone holding them around their body

Standing/stepping when fully supported

Can use alternating steps to walk 8 feet (2.5 m) with minimal support (holding their hand)

Walking with minimal support