The common bipolar phenotype in young people

International Journal of Bipolar Disorders

Table 3 Prevalence of DSM-IV-TR bipolar diagnosis, co-morbidities, and family history of mood disorder

	Probable bipolar (N= 21)	Threshold bipolar (N= 71)	Controls (N= 43)	Significance
DSM-IV-TR bipolar I, II, NOS (%)	62	34	0	LR = 39.812, p < 0.001
DSM-IV-TR bipolar I (%)	5	0	0	LR = 3.762, p = 0.152
DSM-IV-TR bipolar II (%)	38	17	0	LR = 20.837, p < 0.001
DSM-IV-TR bipolar NOS (%)	19	17	0	LR = 13.306, p = 0.001
DSM-IV-TR unipolar depression (%)	5	7	7	LR = 0.158, p = 0.924
DSM-IV anxiety disorder (%)	33	13	0	LR = 17.551, p < 0.001
DSM-IV bulimia nervosa (%)	5	3	0	LR = 2.511, p = 0.285
DSM-IV alcohol dependence/abuse (%)	5	10	2	LR = 2.871, p = 0.238
DSM-IV substance dependence/abuse (%)	10	1	0	LR = 5.053, p = 0.080
Family history of mood disorder^a (%)	75	17	10	LR = 30.164, p < 0.001
Family history of bipolar disorder^a (%)	20	1	0	LR = 11.637, p = 0.003

Anxiety disorders include generalised anxiety disorder, specific phobia, obsessive-compulsive disorder, social phobia, agoraphobia and panic disorder. LR, likelihood ratio; df = 2 for all chi-square analyses. ^aProbable bipolar group: total N = 20; threshold bipolar group: total N = 65; controls: total N = 40.