Do some anxiety disorders belong to the prodrome of bipolar disorder? A clinical study combining retrospective and prospective methods to analyse the relationship between anxiety disorder and bipolar disorder from the perspective of biorhythms

Table 2 Clinical features of disease (categorical variables)

Variables		BD (n = 48)		Atypical (n = 63)		Anxiety (n = 111)		χ ²
Variables		n	%	n	%	n	%
Type of BD	Hypomania	0	0
	Non psychotic mania	12	25
	Psychotic mania	3	6.3
	Mixed state	15	31.3
	Remission	0	0
	Mild depression	12	25
	Non psychotic major depression	3	6.3
	Psychotic major depression	3	6.3
Type of anxiety	GAD			54	85.7	75	67.6	5.607
	OCD			6	9.5	27	24.3
	Stress related disorders			3	4.8	0	0
	Panic Disorder			0	0	9	8.1
First onset	No	48	100	48	76.2	90	81.1	4.187
First onset	Yes	0	0	15	23.8	21	18.9
Type of first onset	GAD	36	75	57	90.5	78	70.3	2.090
	OCD	6	12.5	3	4.8	24	21.6
	Stress related disorders	3	6.3	3	4.8	0	0
	Panic Disorder	3	6.3	0	0	9	8.1
Family history	No	42	87.5	51	81	99	89.2	0.796
Family history	Yes	6	12.5	12	19	12	10.8
Drug abuse	No	45	93.8	60	95.2	108	97.3	0.399
Drug abuse	Yes	3	6.3	3	4.8	3	2.7
Other disease	No	45	93.8	51	81	87	78.4	1.867
Other disease	Yes	3	6.3	12	19	24	21.6

ISSN: 1471-244X