| Emergency (n = 9) | Elective (n = 16) | |
| Age (years) | 61 (14) | 54 (10) |
| BMI (kg/m ) | 50 (9) | 47 (8) |
| Paco2 (kPa) | 9.64 (1.25)* | 6.59 (0.57) |
| FVC% | 51 (18) | 60 (13) |
| FEV1/FVC | 0.79 (0.07) | 0.82 (0.08) |
| ESS/24 | 11 (6) | 12 (5) |
| SRI-SS/100 | 60 (12) | 53 (15) |
| SRI-AS/100 | 60 (18)† | 39 (14) |
| SRI-SR/100 | 80 (18)* | 62 (18) |
| SRI-WB/100 | 65 (10) | 52 (19) |
Values are mean (SD).
*p<0.01; †p<0.05.