. Author manuscript; available in PMC: 2010 Feb 10.

Published in final edited form as: J Pediatr Health Care. 2009 Apr 11;24(1):34. doi: 10.1016/j.pedhc.2009.01.002

Table 3.

Differences in Heart Rate Variability^a

	Type 1 DM	Type 2 DM
Average heart rate	83 ±10	89 ±11
Resting heart rate	71 ± 10	73 ± 9
TotHz (ln ms2)^**	8.45 ± .65	7.70 ± .68
HiHz (ln ms2)^**	6.86 ± .84	5.87 ± .98
LoHz (ln ms2)^**	7.18 ± .65	6.32 ± .71
SDNN (ms)^**	156 ± 34	115 ± 34
SDANN (ms)^**	128 ± 30	98 ± 27
pNN50 ^*	22 ± 13	13 ± 13
rMSSD (ms)^*	65 ± 30	41 ± 25

Reported as Means and SDs.

P < .05

^**

P < .01

Note: Hz = Hertz; SDNN = standard deviation of all R-R intervals; SDANN = standard deviation of all the means of R-R intervals of each 5-minute block; pNN50 = % of adjacent R-R intervals with ≥ 50 ms difference; rMSSD = square root of the mean of the sum of squares of differences between adjacent R-R intervals