- PS 0 – you are fully active, more or less as you were before your illness
- PS 1 – you can’t carry out heavy physical work, but can do anything else
- PS 2 – you are up and about more than half the day. You can look after yourself but can’t work
- PS 3 – you are in bed or a chair for more than half the day. You need help to look after yourself
- PS 4 – you are in bed or a chair all the time and need complete care