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Table 3 Sleep parameters of the three study nights for nightmare sufferers (NM) and healthy controls (HC)
| Variable | Night 1 | Night 2 | Night 3 | |||
|---|---|---|---|---|---|---|
| NM | HC | NM | HC | NM | HC | |
| Sleep period time (min) | 453.73 ± 59.57 | 453.35 ± 68.57 | 454.70 ± 48.86 | 462.55 ± 72.73 | 430.11 ± 42.16 | 464.35 ± 54.12 |
| Sleep efficiency (%) | 83.51 ± 9.19 | 84.99 ± 7.06 | 90.99 ± 3.23 | 88.21 ± 7.08 | 90.28 ± 3.82 | 90.47 ± 4.25 |
| Sleep onset latency (min) | 18.76 ± 13.51 | 22.50 ± 23.87 | 15.26 ± 9.55 | 18.85 ± 16.90 | 16.97 ± 13.25 | 16.82 ± 11.46 |
| REM latency (min) | 105.47 ± 50.44 | 104.32 ± 48.36 | 78.79 ± 37.48 | 94.50 ± 40.95 | 81.47 ± 31.87 | 99.88 ± 43.70 |
| REM density | 20.78 ± 6.45 | 18.86 ± 5.44 | 21.06 ± 5.07 | 20.52 ± 5.71 | 21.11 ± 6.90 | 19.50 ± 6.41 |
| Number of awakenings | 26.94 ± 10.07 | 23.82 ± 8.79 | 24.82 ± 9.36 | 24.59 ± 10.89 | 22.41 ± 6.22 | 26.35 ± 9.17 |
| Number of REM periods | 3,06 ± 0,899 | 2,94 ± 0,966 | 3,82 ± 0,636 | 3,53 ± 1,419 | 3,29 ± 1,213 | 3,41 ± 1,004 |
| Arousal Index | 10.68 ± 3.64 | 8.78 ± 1.86 | 10.38 ± 3.35 | 9.09 ± 2.04 | 9.33 ± 2.62 | 9.75 ± 2.06 |
| Awake% | 11.45 ± 7.58 | 9.54 ± 5.33 | 5.67 ± 2.88 | 6.48 ± 5.05 | 5.76 ± 2.72 | 5.82 ± 3.59 |
| Stage N1% | 9.22 ± 3.03 | 8.03 ± 3.91 | 8.33 ± 3.92 | 8.20 ± 3.96 | 8.39 ± 3.93 | 9.00 ± 2.94 |
| Stage N2% | 42.74 ± 5.92 | 46.41 ± 6.18 | 45.25 ± 7.62 | 46.50 ± 9.01 | 45.01 ± 6.77 | 47.35 ± 7.11 |
| Stage N3% | 22.48 ± 9.24 | 20.77 ± 11.04 | 23.96 ± 9.30 | 20.95 ± 9.68 | 24.75 ± 7.87 | 21.57 ± 9.52 |
| Stage REM% | 13.92 ± 3.60 | 14.70 ± 3.85 | 16.75 ± 3.84 | 15.41 ± 4.21 | 16.05 ± 3.68 | 16.20 ± 3.70 |
| Arousal Index (REM only) | 9.85 ± 5.05 | 7.57 ± 3.47 | 9.66 ± 4.77 | 9.20 ± 4.43 | 10.37 ± 5.24 | 8.15 ± 4.23 |
| Periodic leg movements | 3.00 ± 6.36 | 1.95 ± 3.81 | ||||
| Periodic leg movements with arousal | 0.18 ± .59 | 0.23 ± .50 | ||||
