Table 3.
Results of heart rate variability during NREM and REM sleep (n = 7).
| Sleep-Stage | NREM | REM | NREM + REM | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Trial | Control | Evacuation Shelter | Car | Control | Evacuation Shelter | Car | Control | Evacuation Shelter | Car |
| Mean | Mean | Mean | Mean | Mean | Mean | Mean | Mean | Mean | |
| (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | (95% CI) | |
| Mean RR | 1155.8 | 1095.5 | 1146.6 | 1092.9 | 1039.5 | 1086.4 | 1139.9 | 1087.0 | 1134.3 |
| (ms) | (1045–1266) | (953–1238) | (1007–1286) | (990–1196) | (924–155) | (952–1221) | (1033–1247) | (956–1218) | (997–1272) |
| HF.p | 28.7 | 28.5 | 29.7 | 12.5 | 12.3 | 13.3 | 24.4 | 24.7 | 26.3 |
| (%) | (24.1–33.3) | (22.3–34.8) | (23.2–36.1) | (10.5–14.4) | (8.2–16.3) | (10.7–15.9) | (20.2–28.6) | (19.2–30.2) | (21.1–31.4) |
| LF.p | 22.4 | 24.8 | 26.2 | 23.1 | 24.5 | 24.6 | 22.5 | 24.5 | 25.8 |
| (%) | (18.0–26.8) | (20.6–29.1) | (21.1–31.2) | (19.6–26.7) | (19.9–29.1) | (20.5–28.6) | (18.5–26.5) | (20.4–28.6) | (21.1–30.5) |
| LF/HF | 1.41 | 1.87 | 1.62 | 2.30 | 3.35 | 2.45 | 1.65 | 2.27 | 1.78 |
| ratio | (1.0–1.8) | (1.0–2.7) | (1.1–2.2) | (1.7–2.9) | (2.1–4.6) | (1.8–3.1) | (1.2–2.1) | (1.2–3.4) | (1.3–2.3) |
NREM: non-rapid eye movement; REM: rapid eye movement; HF.p: high frequency divided by its total power; LF.p: low frequency divided by its total power; LF/HF ratio: low frequency/high frequency ratio; CI: confidence interval.