Nightmares affect the experience of sleep quality but not sleep architecture: an ambulatory polysomnographic study

Table 5 REM sleep parameters by different sleep cycles and nights for frequent nightmare sufferers (NM) and healthy controls (HC)

Cycle	Variable	Night 1		Night 2		Night 3
Cycle	Variable	NM	HC	NM	HC	NM	HC
1	Cycle length	103.47 ± 32.06	104.70 ± 19.61	94.05 ± 18.67	110.08 ± 51.54	100.26 ± 21.10	97.94 ± 18.08
	REM duration	13.08 ± 13.85	13.94 ± 7.96	13.94 ± 10.98	13.52 ± 10.98	14.02 ± 6.91	14.11 ± 9.48
	REM density	15.13 ± 6.76	13.57 ± 6.65	14.76 ± 7.20	13.73 ± 8.53	13.57 ± 6.30	13.24 ± 6.30
2	Cycle length	106.64 ± 26.22	96.30 ± 22.13	93.05 ± 27.12	90.39 ± 25.86	99.67 ± 12.02	101.36 ± 16.59
	REM duration	24.35 ± 15.42	20.94 ± 10.55	15.29 ± 9.25	21.76 ± 10.73	25.44 ± 8.78	25.58 ± 9.70
	REM density	20.23 ± 8.72	18.90 ± 8.33	17.35 ± 9.53	19.56 ± 9.60	21.48 ± 10.6	19.21 ± 10.49
3	Cycle length	92.49 ± 22.09	88.00 ± 37.16	80.72 ± 22.00	83.75 ± 21.22	80.77 ± 15.93	77.56 ± 17.62
	REM duration	20.58 ± 11.60	21.53 ± 8.01	23.35 ± 10.27	18.96 ± 15.31	24.26 ± 13.71	23.93 ± 12.21
	REM density	19.77 ± 9.57	21.65 ± 7.76	21.22 ± 8.60	21.25 ± 12.29	18.83 ± 6.44	18.37 ± 5.92
4	Cycle length	83.00 ± 10.10	79.83 ± 13.96	77.37 ± 9.31	84.16 ± 8.37	72.62 ± 8.26	66.16 ± 25.15
	REM duration	28.00 ± 14.77	32.18 ± 8.92	22.61 ± 15.64	27.06 ± 11.14	21.11 ± 10.25	23.12 ± 12.69
	REM density	21.15 ± 8.95	23.26 ± 9.01	21.52 ± 6.59	24.62 ± 8.94	22.46 ± 13.31	30.82 ± 9.35

Results are presented as mean ± standard deviation; cycle length and REM duration are presented in minutes.

ISSN: 2051-6673