Table 1.

Key results from logistic regression models.

Variable	coefficient	s.e.	p value
HDRS
Age group*	-.8	.50	.09
Total cholesterol**	-1.6	.66	.01
Alcohol consumption†	-1.6	.62	.008
ATYP score
Age group*	-1.0	.52	.05
Initial insomnia‡	1.8	.72	.01
Quality of sleep ±	-2.1	.69	.002
Alcohol consumption†	-1.2	.60	.04
SIGH-SAD-SR total score
Age group*	-1.1	.53	.04
Initial insomnia‡	1.5	.70	.03
Quality of sleep ±	-1.6	.66	.02
Alcohol consumption†	-1.8	.62	.005

*Age group: over 40 years vs. under 40 years **Total cholesterol: previous high total serum cholesterol, yes vs. no †Alcohol consumption: over 7 drinks per week vs. 7 drinks or less per week ‡Initial insomnia: trouble falling asleep once a week to daily vs. less than once week ± Quality of sleep: bad or rather bad vs. normal to good