Skip to main content
Figure 1 | Respiratory Research

Figure 1

From: Characterisation of exacerbation risk and exacerbator phenotypes in the POET-COPD trial

Figure 1

Multivariate model for time to first COPD exacerbation (all) and effect of covariates. Time to first COPD exacerbation was analysed using multivariate Cox regression with stepwise model selection. Potential covariates originally also included 'smoking status’ with categories 'non-current smoker’; 'current smoker’ and 'concomitant diagnoses at baseline’ with categories '0, 1 and > 1’ but turned out to be non-significant for the significance level chosen. a≥ 1 exacerbation versus no exacerbation. bOverall p-value based on Wald’s χ2 test for optimal model. cIncludes 23 GOLD category 1 patients. BMI = body mass index; CI = confidence interval; COPD = chronic obstructive pulmonary disease; GOLD = Global Initiative for Chronic Obstructive Lung Disease; ICS = inhaled corticosteroids.

Back to article page