Table 4

 Odds ratio (with 95% confidence intervals) of poor exercise performance in the long distance corridor walk over 400 metres (stepwise logistic regression)*

VariableMore than 6 minDid not participateCompleted test within 6 min
IL-6, interleukin 6; Pimax, maximum inspiratory pressure.
*Odds ratio for each group compared with individuals who completed test within 6 minutes. Hosmer-Lemeshow goodness of fit statistics were 0.5 and 0.2 for model for participants with and without obstructive lung disease, respectively.
†Odds ratio per standard deviation increase in independent variable.
With obstructive lung disease
    Knee extensor strength (Nm)†0.4 (0.2 to 0.7)0.6 (0.4 to 0.8)Referent
    IL-6 (log value)†2.2 (1.1 to 4.4)1.6 (1.1 to 2.5)Referent
    Pimax†0.5 (0.3 to 0.8)0.7 (0.5 to 0.9)Referent
Without obstructive lung disease
    Knee extensor strength (Nm)†0.5 (0.4 to 0.7)0.7 (0.6 to 0.8)Referent
    IL-6 (log value)†1.9 (1.5 to 2.4)1.6 (1.4 to 1.9)Referent
    Pimax†0.8 (0.7 to 0.9)0.9 (0.8 to 0.98)Referent