TABLE 3.

Generalised linear model of risk factors and time to first re-exacerbation including blood eosinophil count

Effect	Regression coefficient	Standard error	95% Confidence interval		p-value
			Lower	Upper
Absolute eosinophil count	−0.001	0.000	−0.001	0.000	0.12
% predicted post-bronchodilator FEV1 at discharge	0.016	0.006	0.004	0.028	0.01
Post-bronchodilator FEV1/FVC ratio in % at discharge	−1.288	0.758	−2.773	0.197	0.09
Charlson Comorbidity Index	0.001	0.067	−0.131	0.133	0.99
Smoking history pack-years	−0.008	0.003	−0.014	−0.001	0.03
Number of severe exacerbations in the past 12 months	−0.102	0.046	−0.193	−0.011	0.03
Time since COPD diagnosis years	<0.001	0.014	−0.026	0.027	0.98
Age	0.002	0.010	−0.016	0.021	0.80
Sex (male)	0.021	0.083	−0.142	0.183	0.80
Smoking habit (current smoker)	−0.137	0.088	−0.308	0.035	0.12
Need for noninvasive ventilation	−0.020	0.110	−0.235	0.195	0.85

FEV₁: forced expiratory volume in 1 s; FVC: forced vital capacity. Bold font indicates statistical significance.