Table 2.

Lifetime psychiatric diagnoses in parents of BO and NBO

	Parents with bipolar psychopathology	Parents with non-bipolar psychopathology	Statistics	P-value
BD-I	23	0	Yates' χ2(1) = 34.8	< 0.001
BD-II	6	0	Yates'	0.03
			χ2(1) = 4.6
BD-NOS	0	0
Major depressive disorder/depressive disorder NOS	1	21	Yates' χ2(1) = 26.6	< 0.001
Generalized anxiety disorder/anxiety disorders NOS	16	9	χ2(1) = 3.4	ns
Phobias	21	14	χ2(1) < 3.0	ns
Alcohol/drug abuse/dependence	23	13	χ2(1) = 6.6	0.01
Post-traumatic stress disorder	12	4	χ2(1) = 5.2	0.02
Panic disorder	16	6	χ2(1) = 6.8	< 0.01
Eating disorder	4	2	χ2(1) = 1.8	ns
Obsessive-compulsive disorder	10	0	χ2(1) = 11.7	< 0.001
Attention deficit hyperactivity disorder	4	2	χ2(1) < 1	ns

Standard deviations (SD) are reported in parentheses. BD = bipolar disorder.