Effects of long-term sleep disruption on cognitive function and brain amyloid-β burden: a case-control study

Table 2 Comprehensive sleep characteristics of maritime pilots and controls

Measures		Controls, n = 16	Maritime pilots, n = 19	p value
PSG	TST, min	406 ± 44	403 ± 51	0.86
	N1, min	46 ± 18	41 ± 14	0.40
	N2, min	232 ± 36	215 ± 36	0.20
	DST, min	50 ± 25	66 ± 28	0.10
	REM, min	68 ± 17	79 ± 17	0.10
	WASO, min	61 ± 26	53 ± 39	0.48
	SEF, %	85.8 ± 7.1	86.1 ± 9.4	0.91
	SOL, min	8 ± 7	11 ± 9	0.32
Actiwatch	No. awakenings	33.5 ± 11.1	37.8 ± 10.3	0.24
Actiwatch	SEF, %	89.3 ± 4.3	86 ± 3.8	0.03*
PSQI (rest week vs. control	Overall score	3.2 ± 1.4	4.5 ± 2.2*	0.049*
PSQI (work week vs. control)	Overall score	3.2 ± 1.4	8.8 ± 2.9**	< 0.001**

Data is shown as mean ± SD (for normally distributed data)
Actiwatch data and PSQI were collected in 2016 and 2017. Actiwatch data was collected for a period of 10 consecutive days; for maritime pilots, these 10 days were a mix of work and rest days. PSQI was administered twice for maritime pilots, including one work week and one rest week
Abbreviations: PSG polysomnography, TST total sleep time, DST deep sleep time, REM rapid eye movement sleep, WASO wake after sleep onset, SEF sleep efficiency, SOL sleep onset latency, PSQI Pittsburgh Sleep Quality Index
*Significant at p <0 .05
**Significant at p < 0.001

ISSN: 1758-9193