Table 6

Results of Cox's proportional hazards analysis for the patients with bronchiectasis

Explanatory variables

Risk ratio

95% confidence interval

P

Age (>65 years)

2.7

1.15–6.29

0.022

LTOT (yes)

3.12

1.47–6.90

0.003

LTOT, long-term oxygen therapy.

Bewick et al. Critical Care 2004 8:389   doi:10.1186/cc2955