Population characteristics
| N | Women, n (%) | Mean age, years (SD) | Mean FEV1 % predicted (SD)* | Mean BMI (SD)† | Median MRCD (IQR) | Assisted ventilation, n (%)‡ | In-hospital deaths, n (%) | |
| Total population | 920 | 496 (53.9) | 73.1 (10.0) | 44.1 (18.0) | 24.6 (6.4) | 4 (4–5) | 199 (21.6) | 96 (10.4) |
| npAECOPD | 621 | 348 (56) | 71.7 (10.2)§ | 43.2 (18.0)** | 24.7 (6.5) | 4 (3–5) | 118 (19.0)¶ | 36 (5.8)§ |
| pAECOPD | 299 | 148 (49.5) | 75.8 (9.1)§ | 46.2 (17.7)** | 24.4 (6.2) | 4 (4–5) | 81 (27.1)¶ | 60 (20.1)§ |
↵* If performed within 2 years of admission, n=788.
↵† n=880.
↵‡ Received either non-invasive ventilation or invasive ventilation during hospital admission.
Significant difference between pneumonic and non-pneumonic AECOPD: §p<0.001,¶p=0.0053,**p=0.026.
BMI, body mass index; FEV1, forced expiratory volume in 1 s; IQR, interquartile range; MRCD, Medical Research Council Dyspnoea Scale; npAECOPD, non-pneumonic acute exacerbations of chronic obstructive pulmonary disease; pAECOPD, pneumonic acute exacerbations of chronic obstructive pulmonary disease.