Clinical features of the NIPPV group (n=9) at assessments 1 and 2
| Assessment 1 Mean (SD) | Assessment 2 Mean (SD) | p Value | |
| Arterialised ear lobe blood CO2
partial pressure (mm Hg) | 49.95 (4.88) | 42.45 (3.83) | 0.0082-160 |
| Arterialised ear lobe blood bicarbonate (mmol/l) | 31.97 (1.45) | 27.07 (1.67) | 0.0082-160 |
| ESS score | 9.14 (5.27) | 4.57 (3.82) | 0.0182-150 |
| HAD Anxiety score | 2.80 (3.03) | 3.40 (1.82) | 0.581 |
| HAD Depression score | 1.33 (2.31) | 1.67 (2.89) | 0.317 |