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 hyperten-sion after adjustment for some traditional risk factors for hypertension (RR 52.31, 95%
confidence interval51.45 to 6.25