Statistical analysis
We then adjusted the association of gait speed with the primary outcome
by using a multivariable Cox proportional hazards model adjusting for
age, BMI and sex, and additionally adjusting for clinically relevant
covariates (MV and CPB time). All tests for statistical significance
were two-tailed with an alpha level of 0.05. Analyses were conducted
using SPS version 20.0 and R version 2.14.113.
.