Table 1.
Demographic characteristics of the participants.
| Variables | n | % | Mean (SD) |
|---|---|---|---|
| Age | 31.48 (7.41) | ||
| Nursing seniority | 8.95 (6.61) | ||
| Education level | |||
| College | 376 | 95.7 | |
| University | 17 | 4.3 | |
| Marital status | |||
| Unmarried | 153 | 38.9 | |
| Married | 240 | 61.1 | |
| Number of children | |||
| None | 258 | 65.6 | |
| 1 | 37 | 9.4 | |
| 2 | 83 | 21.1 | |
| Above 3 | 15 | 3.8 | |
| Shift work | |||
| No | 98 | 24.9 | |
| Yes | 295 | 75.1 | |
| Time-domain parameters | |||
| Heart rate (bpm) | 78.74 ± 11.93 | ||
| SDNN (ms) | 47.71 ± 17.94 | ||
| RMSSD (ms) | 37.97 ± 18.83 | ||
| Frequency-domain parameters | |||
| TP (ms2) | 1918.37 ± 1304.90 | ||
| LF (ms2) | 844.56 ± 809.36 | ||
| HF (ms2) | 529.50 ± 457.42 | ||
| LF/HF | 1.26 ± 1.86 |
SDNN: standard deviation of normal to normal; RMSSD: root mean square of the successive differences; TP: total power; LF: low-frequency HRV; HF: high-frequency HRV; LF/HF: the ratio of low-frequency power to high-frequency power; SD: standard deviation.