| GSI | global severity index |
|---|---|
| ISI | infarct size index; initial slope index; injury severity index; Institute for Scientific Information... |
| ISS | idiopathic short stature; injury severity score; International Society of Surgery; ion-scattering sp... |
| MISS | Medical Interview Satisfaction Scale; Modified Injury Severity Scale |
| PMA | index of prevalence and severity of gingivitis, where P = papillary gingiva, M = marginal gingiva, a... |