Age and tobacco adjusted relative risks of death according to quartiles of heart-rate parameters.

ΔHRexercise: difference between heart-rate at peak exercise and resting heart-rateΔHRrecovery: difference between heart-rate at peak exercise and after 1 min recoveryΔHR5year: difference between resting heart-rate recorded at year 5 and at baseline§The analysis is restricted to 5139 subjects, see methodsRelative risk that was associated with a heart-rate measurement is given for the second, third and fourth quartile, taken the first quartile as reference. Relative risks were estimated with the Cox proportional-hazard model. CI denotes confidence interval.Symbols of p-values for trend test: ***: pThe Paris Prospective Study I.