Effect of a 10 μg/m3 increase in fine PM on HRV measurements in those with and without CVD adjusted for relative humidity, temperature, age, and medication use
| HRV measurements | Averaging time | CVD | Non-CVD |
|---|---|---|---|
| Values are shown as percentage change from the median (95% CI) . | |||
| ln HF-HRV | 1 h | 3 (−19 to 32) | − 5 (−34 to 36) |
| 4 h | 8 (−16 to 38) | − 7 (−36 to 34) | |
| 24 h | 8 (−19 to 43) | − 9 (−40 to 40) | |
| ln r-MSSD | 1 h | − 4 (−11 to 4) | 5 (−8 to 20) |
| 4 h | − 5 (−12 to 3) | 7 (−6 to 23) | |
| 24 h | − 5 (−13 to 3) | 3 (−11 to 21) | |
| ln SDNN | 1 h | 2 (−4 to 8) | − 1 (−15 to 16) |
| 4 h | 3 (−3 to 9) | − 1 (−16 to 16) | |
| 24 h | 1 (−5 to 8) | 1 (−15 to 22) | |