The Greenwich Grading System (GGS) can be used to gauge the contribution that an investigation makes into the overall management of a patient.
Ways in which an investigation may be used:
(1) diagnosis
(2) investigation
(3) treatment
|
Usage |
Role |
Points |
|
diagnosis |
changed |
3 |
|
|
made |
2 |
|
|
confirmed or excluded |
1 |
|
|
no help |
0 |
|
|
incorrect |
-1 |
|
investigation |
only test available |
3 |
|
|
replaced others |
2 |
|
|
suggested more |
1 |
|
|
others of more use |
0 |
|
|
delayed others, interfered |
-1 |
|
treatment |
initiated |
3 |
|
|
altered or stopped |
2 |
|
|
reassurance |
1 |
|
|
no change |
0 |
|
|
incorrect |
-1 |
Rules for determining the GGS for the investigation:
(1) If any of the usages is scored -1, then the GGS is -1.
(2) If all of the usages is scored >=0, then GGS = MAX(points for the 3 usages)
|
GGS |
Value of the Investigation |
|
3 |
essential |
|
2 |
important |
|
1 |
helpful |
|
0 |
unnecessary |
|
-1 |
adverse effect (harmful) |
