Table 4.
QTe, QTp and Te Variabilities and Coherence Data
| Variables | Hypogonadal subjects N = 14 |
Control subjects N = 10 |
P values |
|---|---|---|---|
| Rest | |||
| QTe mean (ms) | 371 ± 36 | 336 ± 22 | 0.016 |
| QTe variance (ms)2 | 47 [29] | 38 [30] | Ns |
| QTe standard deviation | 7 ± 1 | 6 ± 1 | Ns |
| RR (ms) | 924 ± 201 | 854 ± 187 | Ns |
| RR variance (ms2) | 766 [1975] | 915 [1280] | Ns |
| RR standard deviation | 37 ± 22 | 30 ± 11 | Ns |
| QTeVI | − 0.57 [0.75] | − 0.72 [0.63] | Ns |
| RR → QTe, coherence | 0.199 ± 0.029 | 0.214 ± 0.030 | Ns |
| QTp mean (ms) | 274 ± 27 | 242 ± 20 | 0.04 |
| QTp variance (ms2) | 30 [25] | 21 [15] | Ns |
| QTp standard deviation (ms2) | 5 ± 1 | 5 ± 1 | Ns |
| QTpVI | − 1.20 [1.03] | − 1.33 [0.54] | Ns |
| RR → QTp, coherence | 0.223 ± 0.028 | 0.209 ± 0.026 | Ns |
| Te (ms) | 97 ± 14 | 95 ± 11 | Ns |
| Te variance (ms) | 71 [52] | 59 [42] | Ns |
| Te standard deviation | 8 ± 2 | 7 ± 2 | Ns |
| TeVI | − 0.004 [0.86] | − 0.186 [0.60] | Ns |
| RR → Te, coherence | 0.212 ± 0.036 | 0.195 ± 0.025 | Ns |
| QTp → Te, coherence | 0.479 ± 0.049 | 0.462 ± 0.095 | Ns |
| 10 min exercise recovery | |||
| QTe mean (ms) | 306 ± 36 | 273 ± 27 | 0.022 |
| QTe variance (ms2) | 337 [571] | 252 [261] | Ns |
| QTe standard deviation | 25 ± 18 | 19 ± 6 | Ns |
| RR (ms) | 651 ± 141 | 565 ± 11 | Ns |
| RR variance (ms2) | 2456 [3000] | 2716 [3875] | Ns |
| RR standard deviation | 62 ± 39 | 57 ± 25 | Ns |
| QTeVI | − 0.23 [0.57] | − 0.51 [0.57] | Ns |
| RR → QTe, coherence | 0.226 ± 0.054 | 0.246 ± 0.060 | Ns |
| QTe-RR slope, | 0.27 [0.14] | 0.25 [0.21] | Ns |
| QTp mean (ms) | 227 ± 30 | 204 ± 24 | Ns |
| QTp variance (ms2) | 329 [380] | 263 [817] | Ns |
| QTp standard deviation (ms2) | 19 ± 6 | 16 ± 6 | Ns |
| QTpVI | − 0.07 [0.41] | − 0.27 [0.73] | Ns |
| QTp-RR slope | 0.29 [0.13] | 0.21 [0.32] | Ns |
| RR → QTp, coherence | 0.225 ± 0.042 | 0.226 ± 0.049 | Ns |
| Te (ms) | 79 ± 10 | 70 ± 12 | Ns |
| Te variance (ms) | 113 [82] | 89 [82] | Ns |
| Te standard deviation | 12 ± 5 | 10 ± 3 | Ns |
| TeVI | 0.50 [0.82] | 0.06 [0.88] | Ns |
| RR → Te, coherence | 0.208 ± 40 | 0.217 ± 0.038 | Ns |
| QTp → Te, coherence | 0.442 ± 0.083 | 0.569 ± 0.070 | 0.001 |
| Te-RR slope, | 0.041 [0.11] | 0.036 [0.07] | Ns |
These data are detected automatically with a custom software. Values are expressed as mean ± SD or median [interquartile range 75th percentile–25th percentile]
QTe QT end, QTp QT peak, Te T end