Taking a view of ability over a longer period of time helps to iron out fluctuations and presents a more coherent picture of disabling effects. Therefore the descriptor choice should be based on consideration of a 12 month period. Scoring descriptors will apply to individuals where their impairment(s) affects their ability to complete an activity on more than 50 per cent of days in the 12 month period.
The following rules apply:
If someone is awaiting treatment or further intervention it can be difficult to accurately predict its level of success or whether it will even occur.
Descriptor choices should therefore be based on the likely continuing impact of the health condition or impairment as if any treatment or further intervention has not occurred.