The objective was to assess the extent and pattern of illness intrusiv
eness, one measure of quality of life, in subjects with bipolar disord
er (ED) and to determine whether specific illness variables had influe
nced the degree of intrusiveness experienced. To compare findings from
ED subjects relative to published findings for subjects with chronic
medical conditions. The study involved the administration of a self-re
port assessment tool to euthymic outpatients with ED attending a unive
rsity based hospital clinic. Of the 155 eligible participants, 112 com
pleted a standardized psychiatric interview (SADS-L) and 87 of these m
et study criteria for euthymia and were approached to participate in t
he study. Sixty-eight completed self-report measures were returned. Th
e main outcome measure was the Illness Intrusiveness Rating Scale (IIR
S) which was analysed along with a composite measure of life events. I
t resulted that individuals' with ED experience significant illness in
trusiveness into a number of life domains even after controlling for n
egative life events. Factors such as type of ED, the presence of a dep
ressive episode in the preceding year and current Hamilton depression
rating scale score contributed to the total illness intrusiveness. The
degree of total illness intrusiveness experienced by individuals with
ED was similar to that of subjects with multiple sclerosis and greate
r than subjects with end stage renal disease and rheumatoid arthritis.
It seems apparent that quality of life, as determined by illness intr
usiveness, is compromised in subjects with ED even during periods of e
uthymia. ED is at least as intrusive as several chronic medical condit
ions. Those with a type II ED report greater impairment in all domains
compared with type I. Future research should determine specific psych
osocial interventions aimed al reducing the impact of ED. (C) 1997 Els
evier Science Ltd.