Table 3
Multivariate analysis for decline in FEV
1
over 36 months >9%
Parameter
Relative risk
p value
95% CI for RR
ΔP
ET
CO
2
(mm Hg)
11.61
0.004
3.41 to 24.12
V˙O
2
peak (ml/kg/min)
1.23
0.001
1.10 to 1.43
FEV
1
%
1.14
0.005
1.02 to 1.28