The Kaplan-Meier survival analysis showed that the subjects in the upper quartile of BP
response to exercise had a significantly higher cumulative incidence of hypertension on
follow-up than those in the middle two and lower quartiles (log-rank test, p ,0.05).
Multivariate analysis using the Cox proportional hazards survival model showed that the
EBPR was significantly and independently associated with the risk of developing hypertension after adjustment for some traditional risk factors for hypertension (RR 52.31, 95%
confidence interval 51.45 to 6.25