National Early Warning Score 2 (NEWS2) with risk score for oxygen saturations alone shown for scale 1 (normocapnic patients) and for scale 2 (hypercapnic patients)
| NEWS2 scale 1 and original NEWS (normocapnic patients) | NEWS2 scale 2 (hypercapnic patients) | ||
| Oxygen saturations, % | Score | Oxygen saturations, % | Score |
| 91 or less | 3 | 83 or less | 3 |
| 92–93 | 2 | 84–85 | 2 |
| 94–95 | 1 | 86–87 | 1 |
| 96 or more | 0 | 88–92 | 0 |
| 93 or more on air | 0 | ||
| 93–94 on O2 | 1 | ||
| 95–96 on O2 | 2 | ||
| 97 or more on O2 | 3 | ||
Scale 1 is the same as the original NEWS oxygen saturation index and is recommended for most patients including patients with COPD without hypercapnic respiratory failure. Scale 2 is recommended for patients with hypercapnic respiratory failure, whose target saturations are set lower (ie, 88%–92%).