Table 5.
Multiple logistic regressions between heart rate variability items (low vs. normal) and age and occupational physical activity adjusting exercise and other covariates
| SDNN | rMSSD | LF | HF | LF:HF | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Covariates | OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | ||||||
| lower | higher | lower | higher | lower | higher | lower | higher | lower | higher | |||||||
| Age and OPA | ||||||||||||||||
| Age < 45 and low OPA | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | |||||||||||
| Age < 45 and high OPA | 0.6 | 0.2 | 1.7 | 0.6 | 0.1 | 3.3 | 0.7 | 0.3 | 1.7 | 0.6 | 0.1 | 2.3 | 1.1 | 0.4 | 2.9 | |
| Age ≥ 45and lower OPA | 1.9 | 0.4 | 9.5 | <0.1 | <0.1 | >99.9 | 1.9 | 0.4 | 8.5 | 1.2 | 0.1 | 12.5 | 3.1 | 0.6 | 16.6 | |
| Age ≥ 45and high OPA | 10.0 | 0.7 | 136.0 | 64.0 | 2.9 | >99.9 | 4.2 | 0.3 | 51.4 | 18.5 | 1.3 | 259.8 | <0.1 | <0.1 | >99.9 | |
| Exercise (frequency / week) | ||||||||||||||||
| < 3 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | |||||||||||
| ≥3 | 0.7 | 0.4 | 1.4 | 0.2 | 0.0 | 0.8 | 0.7 | 0.4 | 1.4 | 0.5 | 0.2 | 1.3 | 0.9 | 0.5 | 1.8 | |
| Body mass index (kg/m2) | ||||||||||||||||
| Normal (20 - 25) | 1.0 | |||||||||||||||
| Abnormal | 3.1 | 1.1 | 8.6 | |||||||||||||
| Alcohol drinking (frequency / week) | ||||||||||||||||
| <2 | 1.0 | 1.0 | ||||||||||||||
| ≥2 | 1.7 | 0.7 | 4.2 | 1.4 | 0.5 | 3.6 | ||||||||||
| Shift work | ||||||||||||||||
| No | 1.0 | |||||||||||||||
| Yes | 3.4 | 1.2 | 9.2 | |||||||||||||
| Social support | ||||||||||||||||
| Low | 1.0 | 1.0 | ||||||||||||||
| High | 0.3 | 0.1 | 0.9 | 1.9 | 0.8 | 4.5 | ||||||||||
SDNN the standard deviation of normal-to-normal intervals, rMSSD the root-mean square of the difference of successive normal R-R intervals, LF low frequency band power, HF high frequency band power, LF:HF ratio of low-frequency power to high-frequency power, CI confidence interval, OPA occupational physical activity