HRV | Subjects | Patients | p Value |
GP (24 h) (ms2) | 1574 (1117) | 1042 (691) | 0.007 |
GP (08–20 h) (ms2) | 1355 (953) | 877 (535) | 0.03 |
GP (00–05 h) (ms2) | 2620 (2648) | 1765 (1754) | 0.04 |
HF (24 h) (ms2) | 149 (145) | 90 (82) | 0.02 |
HF (08–20 h) (ms2) | 103 (83) | 73 (61) | 0.04 |
HF (00–05 h) (ms2) | 356 (579) | 178 (225) | 0.03 |
LF (24 h) (ms2) | 705 (605) | 445 (355) | 0.02 |
LF (08–20 h) (ms2) | 645 (513) | 379 (273) | 0.01 |
LF (00–05) (ms2) | 1144 (1365) | 777 (982) | NS |
LF/HF (24 h) | 6.1 (4.4) | 6.2 (3.2) | NS |
RR (24 h) (ms) | 841 (127) | 815 (104) | NS |
RR (08–20 h) (ms) | 741 (225) | 723 (195) | NS |
RR (00–05 h) (ms) | 952 (310) | 938 (238) | NS |
SDANN (ms) | 136 (45) | 125 (34) | NS |
SDNN (ms) | 151 (46) | 136 (33) | NS |
SD (ms) | 56 (18) | 49 (13) | 0.02 |
rMSDD (ms) | 29 (11) | 23 (9) | 0.01 |
pNN50 (%) | 8.2 (6.9) | 4.8 (4.8) | 0.01 |
Values are mean (SD).
GP, global power (0.01–1.0 Hz); HF, power of the high frequency peak (0.15–0.40 Hz); LF, power of the low frequency peak (0.04–0.15 Hz); pNN50, proportion of adjacent normal RR intervals differing more than 50 ms from the preceding RR interval, stated as percentage; rMSSD, root mean square of differences of successive normal RR intervals; RR, mean RR interval; SD, mean of all five minute standard deviations of mean RR intervals; SDANN, standard deviation of all five minute mean normal RR intervals; SDNN, standard deviation of normal RR intervals.