Table 2 Association between 24-hour ambient monitor and personal EC concentrations with different hrv measures (from Suh and Zanobetti[72])
HRV measure | Ambient (Central monitor) | Personal monitor | ||
|---|---|---|---|---|
| Â | Change (%) | 95% confidence interval | Change (%) | 95% confidence interval |
SDNN | -1.0 | -3.7 to 1.7 | -4.66 | -7.99 to -1.22 |
RMSSD | -3.6 | -9.5 to 2.8 | -10.97 | -18.00 to -3.34 |
PNN50 | -0.34 | -10.55 to 11.04 | -15.16 | -26.33 to -2.29 |
HF | -2.36 | -11.67 to 7.92 | -13.41 | -23.95 to -1.41 |
LF/HF ratio | 2.60 | -1.89 to 7.29 | 6.22 | 0.15 to 12.64 |