Table 2.
Covariate-adjusted Holter-based measurements significantly different between 5-year age groups by cross-sectional analysis (Group 1: n = 272, Group 2: n = 216, Group 3: n = 71, Group 4: n = 26)
| T1 | T2 | |
|---|---|---|
| (n = 585) | (n = 585) | |
| Mean ± SE | Mean ± SE | |
| Number of APCs | ||
| Group 1 ≤70 | 30 [84] | |
| Group 2 70–74 | 51 [100] | 62 [186] |
| Group 3 75–79 | 74 [264] | 77 [175] |
| Group 4 ≥80 | 55 [270] | 179 [628] |
| P-value | P-value | |
| 1:2 <0.001 | ||
| 2:3 = 0.026 | 2:3 = 0.208 | |
| 3:4 = 0.967 | 3:4 = <0.001 | |
| (n = 585) | (n = 585) | |
| ln VLF | ||
| Group 1 <70 | 7.0 ± 0.04 | |
| Group 2 70–74 | 6.9 ± 0.04 | 6.8 ± 0.1 |
| Group 3 75–79 | 6.8 ± 0.01 | 6.8 ± 0.1 |
| Group 4 ≥80 | 6.7 ± 0.1 | 6.7 ± 0.1 |
| P-value | P-value | |
| 1:2 = 0.008 | ||
| 2:3 = 0.507 | 2:3 = 0.176 | |
| 3:4 = 0.405 | 3:4 = 0.323 | |
| ln LF | ||
| Group 1 <70 | 6.0 ± 0.1 | |
| Group 2 70–74 | 5.8 ± 0.1 | 5.8 ± 0.1 |
| Group 3 75–79 | 5.8 ± 0.1 | 5.61 ± 0.1 |
| Group 4 ≥80 | 5.6 ± 0.2 | 5.5 ± 0.1 |
| P-value | P-value | |
| 1:2 = 0.002 | ||
| 2:3 = 0.698 | 2:3 = 0.103 | |
| 3:4 = 0.337 | 3:4 = 0.195 | |
| Normalised LF | ||
| Group 1 <70 | 66 ± 1 | |
| Group 2 70–74 | 64 ± 1 | 63 ± 1 |
| Group 3 75–79 | 63 ± 1 | 61 ± 1 |
| Group 4 ≥80 | 58 ± 2 | 59 ± 1 |
| P-value | P-value | |
| 1:2 = 0.177 | ||
| 2:3 = 0.342 | 2:3 = 0.011 | |
| 3:4 = 0.038 | 3:4 = 0.253 | |
| ln HF | ||
| Group 1 <70 | 4.8 ± 0.1 | |
| Group 2 = 70–74 | 4.6 ± 0.1 | 4.6 ± 0.1 |
| Group 3 = 75–79 | 4.6 ± 0.1 | 4.6 ± 0.1 |
| Group 4 ≥80 | 4.6 ± 0.2 | 4.6 ± 0.1 |
| P-value | P-value | |
| 1:2 = 0.036 | ||
| 2:3 = 0.853 | 2:3 = 0.918 | |
| 3:4 = 0.898 | 3:4 = 0.433 | |
| Normalised HF | ||
| Group 1 <70 | 22 ± 1 | |
| Group 2 70–74 | 23 ± 1 | 23 ± 1 |
| Group 3 75–79 | 24 ± 1 | 25 ± 1 |
| Group 4 ≥80 | 26 ± 2 | 26 ± 1 |
| P-value | P-value | |
| 1:2 = 0.420 | ||
| 2:3 = 0.438 | 2:3 = 0.048 | |
| 3:4 = 0.165 | 3:4 = 0.601 | |
| LF/HF ratio | ||
| Group 1 <70 | 4.9 ± 0.1 | |
| Group 2 70–74 | 4.6 ± 0.2 | 4.5 ± 0.1 |
| Group 3 75–79 | 4.7 ± 0.3 | 4.0 ± 0.2 |
| Group 4 ≥80 | 4.0 ± 0.4 | 4.0 ± 0.2 |
| P-value | P-value | |
| 1:2 = 0.173 | ||
| 2:3 = 0.943 | 2:3 = 0.004 | |
| 3:4 = 0.170 | 3:4 = 0.975 | |
| Power-law slope | ||
| Group 1 <70 | −1.28 ± 0.01 | |
| Group 2 70–74 | −1.32 ± 0.01 | −1.32 ± 0.01 |
| Group 3 75–79 | −1.33 ± 0.02 | −1.36 ± 0.01 |
| Group 4 ≥80 | −1.37 ± 0.03 | −1.39 ± 0.02 |
| P-value | P-value | |
| 1:2 = 0.005 | ||
| 2:3 = 0.275 | 2:3 = 0.003 | |
| 3:4 = 0.269 | 3:4 = 0.079 | |
| DFA1 | ||
| Group 1 <70 | 1.10 ± 0.01 | |
| Group 2 70–74 | 1.08 ± 0.01 | 1.07 ± 0.01 |
| Group 3 75–79 | 1.07 ± 0.02 | 1.03 ± 0.01 |
| Group 4 ≥80 | 0.99 ± 0.03 | 1.02 ± 0.02 |
| P-value | P-value | |
| 1:2 = 0.212 | ||
| 2:3 = 0.676 | 2:3 = 0.015 | |
| 3:4 = 0.021 | 3:4 = 0.475 | |
| (n = 568) | (n = 600) | |
| Turbulence slope | ||
| Group 1 <70 | 7.1 ± 0.4 | |
| Group 2 70–74 | 7.2 ± 0.4 | 6.8 ± 0.4 |
| Group 3 75–79 | 6.4 ± 0.6 | 5.4 ± 0.4 |
| Group 4 ≥80 | 5.4 ± 1.0 | 4.7 ± 0.5 |
| P-value | P-value | |
| 1:2 = 0.912 | ||
| 2:3 = 0.270 | 2:3 = 0.005 | |
| 3:4 = 0.412 | 3:4 = 0.237 |
See the Table 1 legend for HRV definitions. P < 0.05 in bold.