Table 5 Analysis of covariance in KOSS and HRV (Frequency domain)a
From: Factors related to heart rate variability among firefighters
Unit; Mean (S.D.) | |||
|---|---|---|---|
Variables | LF(ln) | HF(ln) | LF/HF ratio |
Physical environment | |||
Low | 5.55 (0.90) | 5.05 (1.02) | 2.53 (3.10) |
High | 5.60 (1.01) | 5.06 (1.16) | 2.74 (3.59) |
Job demand | |||
Low | 5.59 (0.99) | 5.13 (1.11) | 2.39 (2.83) |
High | 5.58 (0.95) | 5.00 (1.08) | 2.85 (3.75) |
Insufficient job control | |||
Low | 5.59 (0.97) | 5.09 (1.12) | 2.49 (2.59) |
High | 5.57 (0.96) | 5.03 (1.08) | 2.77 (3.87) |
Interpersonal conflict | |||
Low | 5.62 (0.95) | 4.97 (1.10) | 3.04 (3.21) |
High | 5.58 (0.97) | 5.06 (1.10) | 2.62 (3.38) |
Job insecurity | |||
Low | 5.68 (0.94) | 5.10 (1.09) | 2.85 (3.57) |
High | 5.49 (0.98) | 5.02 (1.10) | 2.46 (3.18) |
Organizational system | |||
Low | 5.61 (0.90) | 5.17 (1.04)* | 2.43 (3.00) |
High | 5.56 (1.01) | 4.98 (1.13) | 2.79 (3.60) |
Lack of reward | |||
Low | 5.60 (0.94) | 5.19 (1.08) | 2.21 (2.15) |
High | 5.57 (0.98) | 5.00 (1.10) | 2.85 (3.80) |
Occupational climate | |||
Low | 5.69 (0.93) | 5.18 (1.07)* | 2.55 (3.13) |
High | 5.49 (0.98) | 4.96 (1.11) | 2.72 (3.57) |
Total | |||
Low | 5.60 (0.96) | 5.12 (1.10) | 2.54 (3.14) |
High | 5.56 (0.97) | 5.00 (1.09) | 2.75 (3.59) |