Table 2.
Two-Way ANOVA for repeated measures of HRV parameters for Snorer (n = 10) and Control groups (n = 10) according to sleep stage.
| Snorer group N2 stage | Control group N2 stage | Snorer group SWS | Control group SWS | Snorer group REM | Control group REM | F(2,36) | F(1,18) group | p | |
|---|---|---|---|---|---|---|---|---|---|
| RRi | 783 ± 103 | 875 ± 142 | 785 ± 111 | 862 ± 159 | 778 ± 82 | 842.9 ± 118 | Ns | ns | ns |
| SDNN | 56.1 ± 23.9 | 88.8 ± 52.1 | 38.1 ± 23.7 | 78.8 ± 74.8 | 60.8 ± 29 | 94 ± 58.8 | Ns | ns | ns |
| RMSSD | 52.9 ± 29.4 | 97.1 ± 62.7 | 45 ± 32.5 | 103.6 ± 97.8 | 54.8 ± 45.6 | 89.7 ± 72.1 | Ns | ns | ns |
| NN50 | 14 ± 13.1* | 120 ± 75.4 | 17.3 ± 15.8* | 115.6 ± 83.8 | 14.3 ± 15.1* | 98.5 ± 63.1 | Ns | 19.4 | 0.0003 |
| pNN50 | 24.3 ± 21* | 46.8 ± 19.2 | 24.9 ± 23.7* | 45.4 ± 24.2 | 20.1 ± 22.9* | 35.8 ± 19.6 | Ns | 5.1 | 0.03 |
| VLF | 2436.3 ± 1235 | 3236 ± 4743 | 733.5 ± 349 | 1132 ± 822 | 3480 ± 3179 | 4988 ± 3777 | Ns | ns | ns |
| LF | 3181 ± 1770 | 3241 ± 1861 | 1668 ± 1157 | 1883 ± 944 | 3501 ± 1450 | 2455 ± 1160 | Ns | ns | ns |
| HF | 2622 ± 1247 | 3510 ± 1603 | 2903 ± 1739 | 3574 ± 1825 | 3501 ± 1450 | 2455 ± 1161 | Ns | ns | ns |
| TP | 5823 ± 4259* | 9710 ± 6459 | 3715 ± 3074* | 6899 ± 2591 | 7934 ± 5071* | 10084 ± 5342 | Ns | 4 | 0.05 |
| LF/HF | 1.9 ± 1.3* | 1.1 ± 0.7 | 0.7 ± 0.4# | 0.6 ± 0.3# | 2.8 ± 2.2* | 1.1 ± 0.8 | 3.6 | 4.7 | 0.03, 0.04 |
Data were presented as mean ± standard deviation.
Difference in HRV parameters in each sleep stage according to group factor;
Difference in HRV parameters, according to the interaction between two factors (sleep stages and groups). RRi, the interval between beat to beat (RR); SDNN, Standard deviation of NN intervals for period of interest; RMSSD, Root mean square of successive differences of NN intervals for period of interest; NN50, NN intervals > 50 ms different from previous (NN) for period of interest; pNN50, percentage of NN intervals > 50 ms different from previous (NN) for period of interest Root mean square of successive differences of NN intervals for period of interest; VLF, very low frequency; LF, low frequency; HF, high frequency; TP, total power; LF/HF, LF/HF average over 5-min periods or less that can purported to reflect sympathetic nervous system per parasympathetic nervous system balance.