Table 3.
Mean values of heart rate variability by job stress
| Unit; Mean (S.D.) | |||||
|---|---|---|---|---|---|
| Time domain | Frequency domain | ||||
| Variables | SDNN | RMSSD | LF(ln) | HF(ln) | LF/HF ratio |
| Physical environment | |||||
| Low | 37.47 (13.42) | 28.91 (15.18) | 5.55 (0.90) | 5.05 (1.02) | 2.53 (3.10) |
| High | 38.62 (15.65) | 29.75 (16.13) | 5.60 (1.01) | 5.06 (1.16) | 2.74 (3.59) |
| Job demand | |||||
| Low | 38.61 (14.73) | 30.96 (16.41)* | 5.59 (0.99) | 5.13 (1.11) | 2.39 (2.83) |
| High | 37.64 (14.59) | 28.04 (14.97) | 5.58 (0.95) | 5.00 (1.08) | 2.85 (3.75) |
| Insufficient job control | |||||
| Low | 38.40 (15.82) | 29.79 (17.59) | 5.59 (0.97) | 5.09 (1.12) | 2.49 (2.59) |
| High | 37.84 (13.70) | 29.02 (14.08) | 5.57 (0.96) | 5.03 (1.08) | 2.77 (3.87) |
| Interpersonal conflict | |||||
| Low | 37.92 (14.27) | 27.86 (13.66) | 5.62 (0.95) | 4.97 (1.10) | 3.04 (3.21) |
| High | 38.09 (14.69) | 29.46 (15.83) | 5.58 (0.97) | 5.06 (1.10) | 2.62 (3.38) |
| Job insecurity | |||||
| Low | 38.85 (14.78) | 30.21 (16.81) | 5.68 (0.94)* | 5.10 (1.09) | 2.85 (3.57) |
| High | 37.39 (14.53) | 28.59 (14.60) | 5.49 (0.98) | 5.02 (1.10) | 2.46 (3.18) |
| Organizational system | |||||
| Low | 38.84 (14.81) | 30.52 (16.92) | 5.61 (0.90) | 5.17 (1.04)* | 2.43 (3.00) |
| High | 37.56 (14.54) | 28.56 (14.76) | 5.56 (1.01) | 4.98 (1.13) | 2.79 (3.60) |
| Lack of reward | |||||
| Low | 39.40 (15.75) | 31.26 (17.61)* | 5.60 (0.94) | 5.19 (1.08)* | 2.21 (2.15)* |
| High | 37.45 (14.08) | 28.45 (14.62) | 5.57 (0.98) | 5.00 (1.10) | 2.85 (3.80) |
| Occupational climate | |||||
| Low | 39.54 (15.25)* | 31.28 (17.50)* | 5.69 (0.93) | 5.18 (1.07)* | 2.55 (3.13) |
| High | 36.87 (14.05) | 27.76 (13.84) | 5.49 (0.98) | 4.96 (1.11) | 2.72 (3.57) |
| Total | |||||
| Low | 38.51 (15.06) | 30.41 (17.28) | 5.60 (0.96) | 5.12 (1.10) | 2.54 (3.14) |
| High | 37.65 (14.24) | 28.30 (13.89) | 5.56 (0.97) | 5.00 (1.09) | 2.75 (3.59) |
* : p < 0.05