Table 1.

Socio-demographic and clinical characteristics of participants for the AR and RO analysis. The demographic and clinical statistics are only given for the majority (19/25) of participants where two independent ROs were needed to describe their mood fluctuations—see Results for further explanation.

	AR analysis (n = 42)		RO analysis (n = 19)
characteristics	mean	s.d.	mean	s.d.
age at study intake, years	41.3	11.8	40.2	13.2
age at illness onset, years	20.4	8.7	20.9	11.8
duration of illness, years	21.0	11.8	19.9	14.0

	number	%	number	%
male	11	26.2	1	5.3
female	31	73.8	18	94.7
ethnic origin
mixed	2	4.8	1	5.3
White	38	90.5	17	89.5
Chinese	1	2.4	1	2.4
Asian	1	2.4	0	0
educational level, years
without diploma equivalent	1	2.4	0	0
high school graduate	7	16.7	4	21.1
college graduate	33	78.6	15	78.9
unrecorded	1	2.4	0	0
bipolar I disorder	29	69.0	15	78.9
bipolar II disorder	13	31.0	4	21.1