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QT/RR Slope in the Study Groups: Entire (E) and Both Daytime (D) and Nighttime (N) Periods
| QT/RR‐E | QT/RR‐D | QT/RR‐N | D vs N (P =) | |
|---|---|---|---|---|
| NoVT/VF | 0.151 ± 0.03 | 0.152 ± 0.03 | 0.138 ± 0.03 | 0.085 |
| VT/VF | 0.195 ± 0.03 | 0.200 ± 0.04 | 0.190 ± 0.03 | 0.115 |
| P value | < 0.001 | < 0.001 | < 0.001 |
