International Prognostic Index
| Full index |
| Prognostic factors |
| Age older than 60 y |
| Performance status of 2 or higher |
| LDH level greater than 1× normal |
| Extranodal sites of 2 or more |
| Stage III or IV |
| Risk category and factors |
| Low, factor 0 or 1 |
| Low-intermediate, factor 2 |
| High-intermediate, factor 3 |
| High, factor 4 or 5 |
| Age adjusted |
| Prognostic factors |
| Performance status higher than 1 |
| LDH level greater than 1× normal |
| Stage III or IV |
| Risk category and factors |
| Low, factor 0 |
| Low-intermediate, factor 1 |
| High-intermediate, factor 2 |
| High, factor 3 |
| Full index |
| Prognostic factors |
| Age older than 60 y |
| Performance status of 2 or higher |
| LDH level greater than 1× normal |
| Extranodal sites of 2 or more |
| Stage III or IV |
| Risk category and factors |
| Low, factor 0 or 1 |
| Low-intermediate, factor 2 |
| High-intermediate, factor 3 |
| High, factor 4 or 5 |
| Age adjusted |
| Prognostic factors |
| Performance status higher than 1 |
| LDH level greater than 1× normal |
| Stage III or IV |
| Risk category and factors |
| Low, factor 0 |
| Low-intermediate, factor 1 |
| High-intermediate, factor 2 |
| High, factor 3 |
LDH indicates lactate dehydrogenase.
Adapted with permission.25