Table 2.
Associations of 5 min means of PM2.5 concentration with R-HR a for 2 day monitoring (n = 15,294), and G-HR b for 7 day monitoring (n = 25,969).
| R-HR | G-HR | |||||
|---|---|---|---|---|---|---|
| Coefficient c | 95% CI d | p-Value | Coefficient c | 95% CI d | p-Value | |
| PM2.5 | 0.229 | 0.127, 0.332 | <0.001 | 0.234 | 0.0801, 0.389 | 0.003 |
| Age | −2.50 | −8.23, 3.59 | 0.412 | −1.83 | −6.47, 3.04 | 0.454 |
| BMI | 5.78 | −0.800, 12.8 | 0.086 | 6.50 | 1.33, 11.9 | 0.013 |
| Gender | 2.03 | −4.23, 8.70 | 0.534 | −1.31 | −6.12, 3.74 | 0.604 |
a Heart rate derived from RootiRx. b Heart rate derived from Garmin Forerunner 35 excluding activity intensity measurements <1100 mG. c Coefficients calculated as [10(β IQR) −1] 100%, where β denotes the effect estimate. Coefficients expressed as percent change in HR associated with each interquartile range (IQR) increase in personal PM2.5 exposures, in models adjusted for subject, age, gender, body mass index (BMI), temperature, activity, and time of day. d CI, confidence interval.