Table 6.

Coefficients (log hazard ratio) for HRV Measures in Unadjusted and Adjusted (for age, race, CVD status, and beta-blocker use) Cox Proportional Hazards Models for 5-Year Mortality

Note: AIC = Akaike information criterion; PPS = partial predictive score; HRV = heart rate variability; CVD = cardiovascular disease; VLF = very low frequency; LF = low frequency; HF = high frequency; SDNN = standard deviation of N-N intervals; pNN50 = proportion of all N-N intervals that are larger than 50 ms; RMSSD = root-mean-squared differences of successive N-N intervals; PC = principal components.