The inter-critical phase in bipolar disorder may contain symptoms that do not meet the diagnostic criteria for a thymic episode. According to studies, these symptoms are common and usually associated with impaired psychosocial and family functioning.

Study the subsyndromal symptoms in remitted patients with bipolar disorder, and their functioning repercussions.

We conducted a cross-sectional, descriptive and analytical study, in the outpatient psychiatry department of the University Hospital in Sfax (Tunisia) among 30 remitted patients with bipolar disorder. We used: the Montgomery And Asberg Depression Rating Scale (MADRS), the Angst Hypomania Questionnaire and the FAST test to assess functioning levels.

The average age of our population was 44.37±15.45 years with a sex ratio (M/F) =0.66. Most of them lived in urban areas (60%) and half of them did not go beyond the primary school level. Most did not have a constant job (76.6%). The average number of previous thymic episodes was 2±1.33 times/year. A quarter of the patients (26.6%) had hypomanic symptoms in the intercritical phase and 20% had depressive symptoms. Hypomanic symptoms were correlated with tobacco use (p=0.035). Depressive symptoms weremore frequent in men (p=0.074). Functioninglevel was lower in subjects living in rural areas (p=0.065).

Our study suggests that residual symptoms were frequent with a significant functional impact. As a result, their identification and management are highly essential to improve the overall functioning of patients with bipolar disorder.