Table 3.

Clinical outcomes of COPD exacerbation at baseline admission.

Treatment during admission	Total admissions at baseline (n = 811)
	Eosinophils ≥300	Eosinophils <300	P-value
Need for supplementary O2	79 (74)	579 (82)	0.04
Nebuliser treatment (Ipratropium, Salbutamol)	102 (95)	647 (92)	0.2
Antibiotics (oral or iv)	69 (65)	567 (81)	<0.001
Corticosteroids (oral or iv)	102 (95)	639 (91)	0.1
Non-invasive ventilation	8 (8)	138 (20)	0.002
Treatment at intensive care unit	5 (5)	30 (4)	0.07
Discharged with long-term oxygen therapy*	1 (1)	44 (6)	0.02
Length of stay, mean in days	2 (1–5)	3 (1–7)	<0.001
In-hospital mortality	1 (1)	40 (6)	0.04

Data presented as number (%), median (25^th-75^th interquartile range), unless otherwise stated.

*Not applicable for patients who already had home oxygen or who died under index admission.