Due to rapid industrialization and

AcknowledgmentsThis work was supported in part by the National Natural Science Foundation of China (No. 21277070) and the Jiangsu Provincial Innovation Fund.
BMI, body mass index; CAD, coronary artery disease; FRS, Framingham risk score; HDL, high-density lipoprotein; HF, high frequency; HRV, (S)-SNAP 5114 rate variability; LDL, low-density lipoprotein; LF, low frequency; PM2.5, particulate matter with an aerodynamic diameter of ≤ 2.5 μm; PM10, particulate matter with an aerodynamic diameter of ≤ 10 μm; rMSSD, root mean square of successive differences in adjacent NN intervals; SDNN, standard deviation of NN intervals; TP, total power
Particulate matter; Framingham risk score; Heart rate variability
1. Introduction
In the present study, we aim to investigate the association of personal PM exposure with HRV, as well as the potential effect modification of FRS on PM and HRV in community-resident adults in two cities carpals differ in air quality.