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

Table 1

Demographic characteristics of shift-working (SW) and daytime (DT) nurses [SD= standard deviation].

	SW nurses			DT nurses			P-value
	(n=20)			(n=20)
	Mean	SD	%	Mean	SD	%
Age (years)	43.6	3.2		45.9	3.1		0.027
Job seniority (years)	19.9	4.2		24.5	4.5		0.002
Shift work seniority (years)	19.9	4.2
Nights worked per month	6.0	1.0
Smokers (%)			35.0			50.0	0.337
Alcohol drinkers (%)			25.0			35.0	0.490