Horn et al reported a simple index of disease severity. They also reported the Patient Severity Index (PSI) for a more detailed assessment.
|
Clinical Status
|
Index
|
|
perfectly healthy
|
0
|
|
single mild disease
|
1
|
|
single moderate or severe disease, with uncomplicated recovery expected
|
2
|
|
major illness, with complicated recovery or no recovery expected
|
3
|
|
multiple conditions requiring treatment
|
3
|
|
catastrophic illness that may lead to death
|
4
|
This somewhat resembles the ASA classification of preoperative status.
