People with a mild restriction are likely to have early disease. They are likely to have unilateral tremor, normal balance, normal cognition and a UPD rating scale score of 1-10.

The ability to walk is unlikely to be impeded and they would normally be able to find their way around in unfamiliar places.

The resulting disability is unlikely to affect their ability to independently carry out activities of daily living.

People with a moderate restriction are likely to have bilateral symptoms of tremor, rigidity and bradykinesia but normal or mildly disturbed balance and rare falls, mild impairment of cognition and a UPD rating scale score of 11-20.

The ability to walk may be impeded and may fluctuate with some falls but they would normally be able to find their way around in unfamiliar places.

The resulting disability may lead them to require assistance with undertaking complex activities and may require prompting to prepare food, take medication, deal with correspondence and financial matters and undertake appropriate activities.

They may require assistance with some aspects of bodily function that includes toileting, washing, dressing, eating and drinking.

They are not likely to require supervision to prevent potentially dangerous behaviours or activities.

People with a severe restriction are likely to have bilateral symptoms of tremor, rigidity and bradykinesia and impairment of balance: Dementia, psychosis or confusion; and a UPD rating scale score of 21-30.

The ability to walk is highly likely to be impeded and they would not normally be able to find their way around safely in unfamiliar places.

The resulting disability is likely to lead them to require assistance with most or even all activities of daily living.

They are likely to require assistance with most aspects of bodily function that includes toileting, washing, dressing, eating and drinking.

They are likely to require supervision to prevent potentially dangerous behaviours or activities.