SDNN | HF | LF | LF/HF | |||||||
---|---|---|---|---|---|---|---|---|---|---|
n | IQR | β | p-value | β | p-value | β | p-value | β | p-value | |
PM2.5 (μ g/m3) | ||||||||||
5-min | 2982 | 8.43 | 2.30 | 0.01† | 0.81 | 0.73 | 1.99 | 0.33 | 1.22 | 0.50 |
30-min | 2826 | 8.62 | 0.09 | 0.92 | 1.71 | 0.48 | 0.46 | 0.82 | −1.32 | 0.45 |
60-min | 2645 | 7.28 | 0.43 | 0.61 | 2.12 | 0.34 | 1.76 | 0.36 | −0.48 | 0.77 |
90-min | 2459 | 6.56 | 0.33 | 0.70 | 3.58 | 0.12 | 2.14 | 0.26 | −1.44 | 0.38 |
Ozone (ppm) | ||||||||||
5-min | 3964 | 58.5 | −0.40 | 0.72 | −13.17 | < 0.0001† | −9.67 | 0.0001† | 4.18 | 0.08 |
30-min | 3706 | 60.2 | −2.07 | 0.06 | −10.72 | 0.0001† | −7.82 | 0.001† | 3.28 | 0.15 |
60-min | 3448 | 62.8 | −3.75 | 0.002† | −13.78 | < 0.0001† | −11.06 | < 0.0001† | 3.16 | 0.23 |
90-min | 3194 | 60.0 | −6.23 | < 0.0001† | −19.14 | < 0.0001† | −16.86 | < 0.0001† | 2.96 | 0.31 |
CO (ppm) | ||||||||||
5-min | 3917 | 5.60 | −2.15 | 0.0001† | 1.56 | 0.31 | −0.82 | 0.52 | −2.37 | 0.04† |
30-min | 3676 | 8.57 | −3.18 | 0.0006† | 3.03 | 0.22 | −1.44 | 0.49 | −4.36 | 0.02† |
60-min | 3424 | 8.88 | −3.53 | 0.0007† | 0.23 | 0.93 | −2.52 | 0.28 | −2.78 | 0.21 |
90-min | 3170 | 7.98 | −3.52 | 0.0003† | −2.39 | 0.37 | −2.35 | 0.31 | 0.07 | 0.98 |
CO2 (ppm) | ||||||||||
5-min | 3933 | 77.8 | −1.81 | 0.007† | 1.11 | 0.54 | −2.35 | 0.13 | −3.43 | 0.01† |
30-min | 3678 | 90.2 | −2.06 | 0.02† | 0.34 | 0.89 | −2.55 | 0.20 | −2.89 | 0.11 |
60-min | 3420 | 90.9 | −3.75 | 0.0001† | −2.27 | 0.38 | −4.72 | 0.03† | −2.29 | 0.24 |
90-min | 3168 | 92.3 | −4.86 | < 0.0001† | −4.74 | 0.11 | −7.26 | 0.004† | −2.47 | 0.27 |
Formaldehyde (ppb) | ||||||||||
5-min | 1604 | 20.9 | −0.81 | 0.31 | 1.93 | 0.39 | −1.74 | 0.38 | −1.74 | 0.03† |
30-min | 1495 | 26.3 | −1.18 | 0.31 | −1.52 | 0.63 | −2.01 | 0.47 | −0.52 | 0.83 |
60-min | 1367 | 24.6 | −2.12 | 0.08 | −6.29 | 0.04† | −5.22 | 0.05† | 1.00 | 0.69 |
90-min | 1241 | 28.8 | −4.22 | 0.006† | −10.22 | 0.007† | −8.24 | 0.02† | 2.34 | 0.47 |
NO2 (ppb) | ||||||||||
5-min | 3964 | 95.3 | −2.85 | < 0.0001† | 1.13 | 0.41 | −2.46 | 0.03† | −3.49 | 0.0006† |
30-min | 3706 | 111 | −2.49 | 0.0001† | 1.17 | 0.52 | −1.95 | 0.20 | −3.05 | 0.03† |
60-min | 3448 | 136 | −2.40 | 0.008† | 0.77 | 0.75 | −1.96 | 0.34 | −2.58 | 0.15 |
90-min | 3194 | 136 | −2.69 | 0.006† | −0.91 | 0.73 | −1.36 | 0.56 | −0.24 | 0.90 |
NOx (ppm) | ||||||||||
5-min | 3964 | 121 | −3.07 | < 0.0001† | −0.83 | 0.46 | −2.29 | 0.02† | −1.48 | 0.09 |
30-min | 3706 | 172 | −3.37 | < 0.0001† | −1.44 | 0.43 | −3.03 | 0.06 | −1.61 | 0.26 |
60-min | 3448 | 197 | −4.02 | < 0.0001† | −2.10 | 0.34 | −4.03 | 0.04† | −1.85 | 0.28 |
90-min | 3194 | 200 | −3.61 | < 0.0001† | −3.83 | 0.13 | −3.34 | 0.14 | 0.58 | 0.78 |