Table 3 Association between particulate matter exposure and heart rate variability indices

 PM_2.5

−0.54(− 0.99, − 0.097)

0.017

− 0.76(− 1.48, − 0.04)

0.039

 PM_10–2.5

0.01(− 0.12,0.12)

0.989

0.14(− 0.08,0.25)

0.218

 PM₁₀

0.05(− 0.09,0.19)

0.448

0.05(− 0.14,0.25)

0.591

 PM_2.5

− 0.35(− 0.71,0.01)

0.059

0.34(− 1.32,0.64)

0.493

 PM_10–2.5

0.63(0.11,1.13)

0.017

−0.11(− 1.73,0.95)

0.846

 PM₁₀

−0.52-0.95, − 0.93)

0.017

− 0.34(− 1.32,0.64)

0.035

 PM_2.5

0. 49(− 0.86,0.33)

≤0.001

−0.27(−1.34,0.79)

0.620

 PM_10–2.5

0.93(− 0.41,1.46)

≤0.001

− 0.01(−1.26,1.28)

0.275

 PM₁₀

−0.77(− 0.86, − 1.24)

0.009

− 0.57(− 1.56,0.46)

0.255

 PM_2.5

−0.002(− 0.009,0.004)

0.507

− 0.007(− 0.004,0.023)

0.154

 PM_10–2.5

0.003(− 0.006,0.012)

0.552

− 0.006(− 0.101,0.002)

0.479

 PM₁₀

0.002(− 0.006,0.012)

0.533

− 0.004(− 0.021,0.010)

0.213

 PM_2.5

0.002(−0.005,0.010)

0.521

0.010(−0.005,0.025)

0.199

 PM_10–2.5

0.001(−0.002,0.002)

0.903

−0.004(− 0.009,0.001)

0.107

 PM₁₀

−0.001(− 0.004,0.001)

0.310

− 0.005(− 0.012,0.001)

0.104

 PM_2.5

0.008(−0.002, 0.019)

0.117

0.020(−0.256,0.301

0.867

 PM_10–2.5

0.013(0.001, −0.245)

0.035

0.004(−0.402–0.032)

0.030

 PM₁₀

0.015(− 0.029–0.011)

0.035

0.003(−0.273–0.034)

0.836

 PM_2.5

0.014(−0.023, 0.051)

0.462

0.066(−0.015,0.147)

0.110

 PM_10–2.5

0.001(−0.007,0.009)

0.862

−0.001(− 0.027,0.025)

0.932

 PM₁₀

0.002(−0.013,0.009)

0.742

−0.010 (− 0.040,0.020)

0.522