Table 1.

Results from ANOVA of polysomnography (PSG) variables and self‐reported data versus sleep duration. Adjusted for age, body mass index (BMI), disease and medication. df = 3/382, except for sleep latency (df = 3/307)

Variables	F‐ratio	p=	Variables	F‐ratio	p=
Sleep efficiency	56.2	0.000*	Delta dominance	6.1	0.000
WTSP	22.7	0.000	REM density	1.3	0.263
Awakenings/hr	7.1	0.000	REM intensity	8.2	0.000
Arousals/hr	4.2	0.001	% Sleep segments ≥ 10 min	4.5	0.005*
AHI/hr	1.1	0.356	% Wake segments ≥ 10 min	5.1	0.000*
Sleep latency/ min	7.5	0.000	Self‐reported:
N3 latency	3.7	0.003	Quality of rec. sleep	7.0	0.000*
REM latency	3.0	0.012	PSG affected sleep	0.9	0.465
N1	2.7	0.019	Habitual/usual sleep duration	1.3	0.239
N1%	4.2	0.001	Sleep duration different from usual	26.9	0.000
N2	65.9	0.000	Sleep quality different from usual	4.0	0.002*
N2%	0.2	0.756	Habitual sleep medication	0.7	0.613
N3	4,7	0.000	Habitual sleep quality	1.4	0.224
N3%	0.4	0.835	HAD anxiety	3.0	0.011
REM/min	51.7	0.000	HAD depression	0.9	0.487
REM%	10.3	0.000	Lights out	14.2	0.000
Fast spindles/hr N2	1.2	0.296	Time of awakening	8.8	0.000
Slow spindles/hr N2	1.2	0.303

Note. AHI, apnea–hypopnea index; PSG, polysomnography; HAD, Hospital Anxiety and Depression Scale; WTSP, wake time during total sleep period; REM, rapid eye movement sleep.

All significant F‐ratios showed a significant linear contrast at <0.002, except for HAD depression (with p = 0.011).

^* F‐ratios with a significant quadratic contrast at p < 0.05.