Table 6– Prospective cohort: acute exacerbations, Cox proportional hazard analysis of variables at the time of diagnosis
VariableHazard ratio (95% CI)p-value
DL,CO % pred0.93 (0.89–0.97)0.0008
Concomitant emphysema3.20 (1.06–10.67)0.040

  • DL,CO: diffusing capacity of the lung for carbon monoxide; % pred: % predicted. Model 1 (cut-off), p-value of the model 0.0004.