Table 1.

Characteristics of media workers with or without irregular shift work.

	IRW (n = 65)	RDW (n = 66)	P value*
Mean (SD):
Age, years	39.2 (10)	43.6 (10)	<0.05
Body mass index	24.4 (3.2)	24.5 (4.7)	NS
Actual sleeping time, hours	5.9 (1)	6.6 (0.7)	<0.01
Men	47% (n = 31)	48% (n = 32)	NS
Alcohol consumption (over 10 alcohol equivalent units/week)	22%	20%	NS
Single, divorced, or widowed	38%	52%	NS
Perceived severe stress	12%	9%	NS

*Statistics: Student's t-test for group means and chi square test for proportions.