[Table/Fig-5]:
Predictors of mortality (Multivariate analysis).
| Standard error | 95% Confidence Interval | z-statistic | Significance level | |
|---|---|---|---|---|
| 6MWD ~FEV1/FVC | 0.0659 | 0.0588 to 0.317 | 2.852 | p=0.004 |
| 6MWD ~ FVC% predicted | 0.0679 | 0.113 to 0.379 | 3.623 | p<0.001 |
| 6MWD ~ FEV1% predicted | 0.0731 | 0.170 to 0.457 | 4.29 | p<0.001 |
| FEV1/FVC ~ FEV1% predicted | 0.0564 | 0.0151 to 0.236 | 2.227 | p=0.026 |
| FEV1/FVC ~ FVC predicted | 0.0784 | 0.0956 to 0.212 | 0.741 | p=0.459 |
| FEV1%predicted ~FVC% predicted | 0.104 | -0.136 to 0.270 | 0.651 | p=0.515 |
By multivariate analysis we can note that 6MWD is a better predictor of mortality than FEV1/FVC (p=0.004), FEV1% (p<0.001), FVC% (p<0.001). Log rank test was applied to calculate p-value.