NOCTURNIN Gene Diurnal Variation in Healthy Volunteers and Expression Levels in Shift Workers

Table 4

Energy expenditure in shift-working (SW) and daytime (DT) nurses [SD= standard deviation].

	SW nurses		DT nurses		P-value
	(n=20)		(n=20)
	Mean	SD	Mean	SD
Total energy expenditure (kcal)	2010	687	1955	708	0.805
Energy expenditure due to motor activity (kcal)	1332	531	1277	567	0.753
Physical activity (minutes	144	111	82	67	0.039
Time lying down (minutes)	495	62	457	51	0.041
Sleep duration (minutes)	403	72	382	56	0.310

activity > 3 METs.