Table 2.
Demographics and spirometry results
| Demographics | Patients | n = 122 |
| Sex | Female: n = 63 (52%) | |
| Age | 62 (±8) years | |
| Height | 166 (± 9) cm | |
| Weight | 69 (±19) kg | |
| Body mass index | 25 (±6) | |
| History of previous intubation | n = 7 (6%) | |
| Prior use of home NIV | n = 5 (4%) | |
| Spirometry within ±3 months of index admissiona | COPD stage | I: n = 0 II: n = 5 (7%) III: n = 19 (26%) IV: n = 48 (67%) |
| FEV1 percent predicted | 30 (±13) % | |
| Vital capacity | 58 (±18) % | |
| Total lung capacity | 139 (±26) % | |
| ABG at time of spirometrya | pH | 7.4 (±0.4) |
| paO2 | 63 (±12) mm Hg | |
| paCO2 | 49 (±10) mm Hg |
FEV1 forced expiratory volume in 1 s, ABG arterial blood gas, COPD chronic obstructive pulmonary disease, NIV non-invasive ventilation
aspirometry within 3 months of index admission was available in 46.7% of the patients