ATLAS score calculation11
| Parameter | 0 point | 1 point | 2 points |
| Age (years) | <60 | 60–79 | ≥80 |
| Treatment with systemic antibiotics during CDI therapy (≥1 day) | No | – | Yes |
| Leucocyte count (cells/mm3) | <16 000 | 16 000–25 000 | >25 000 |
| Albumin (g/dL) | >3.5 | 2.6–3.5 | ≤2.5 |
| Serum creatinine (μmol/L) | <120 | 121–179 | ≥180 |
Adapted from Miller et al. [11]
Copyright 2013, with permission from BioMed Central Ltd. under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0).
CDI, Clostridium difficile infection.