Seasonality in depressive and anxiety symptoms among primary care patients and in patients with depressive and anxiety disorders; results from the Netherlands Study of Depression and Anxiety

Table 11 Melancholic symptoms of the IDS: regression model with groups, seasons, covariates and full model with interactions

Main Effects	B	SE	LB	UB	β	p	B	SE	LB	UB	β	p
Intercept	1.62	0.25	1.12	2.12		< 0.01*	1.28	0.28	0.73	1.82		< 0.01*
HC (reference)
MDD	6.64	0.31	6.03	7.26	.70	< 0.01*	7.46	0.41	6.64	8.27	.79	< 0.01*
AAD	2.94	0.31	2.34	3.54	.31	< 0.01*	2.89	0.31	2.29	3.50	.32	< 0.01*
MDD + AAD	-1.69	0.45	-2.56	-0.81	-.17	< 0.01*	-1.63	0.45	-2.50	-0.75	-.16	< 0.01*
Summer (reference)
Autumn	0.20	0.26	-0.31	0.72	.02	0.44	0.23	0.26	-0.28	0.75	.02	0.38
Winter	0.20	0.28	-0.35	0.75	.02	0.47	0.74	0.36	0.03	1.44	.07	0.04*
Spring	0.20	0.28	-0.35	0.74	.02	0.48	0.22	0.28	-0.33	0.76	.02	0.43
Men (reference)
Women	-0.34	0.20	-0.73	0.05	.04	0.09	0.03	0.26	-0.48	0.55	.003	0.90
Two way interactions
Winter & MDD							-1.06	0.45	-1.95	-0.18	-.07	0.02*
Women & MDD							-0.90	0.40	-1.69	-0.12	-.09	0.02*

ISSN: 1471-244X