Monitorization of Autonomic Stress Response of Nurse Students in Hospital Clinical Simulation

Table 2

Differences in the measures through hospital clinical simulation.

	Prepractice	1/10	5/10	10/10	Postpractice	Chi^2	Sig.	Post hoc
	M0	M1	M2	M3	M4
LF (n.u.)						5.156	0.272
HF (n.u.)						5.156	0.272
LF/HF ratio (n.u.)						5.156	0.272
PNN50 (N°)						14.180	0.015
RMSSD (ms)						4.664	0.458
SD1 (ms)						7.778	0.100
SD2 (ms)						14.489	0.006	; ;

M: moment; HRV: heart rate variability; LF: the low-frequency band in normalized units (low-frequency); HF: the high-frequency band in normalized units (high-frequency); LF/HF ratio: a ratio of low frequency to high frequency; PNN50: the proportion of NN50 divided by the total number of NNs; RMSSD: square root of the mean of the sum of the squared differences between adjacent normal R-R intervals; n.u.: normalized unit; SD1: standard deviations of the scattergram 1; SD2: standard deviations of the scattergram 2.