Frequency of positive family history in bipolar patients in a catchment-area population

1. Major family studies of bipolar disorder report the frequency of affective disorder among probands' relatives, but do not usually report the frequency of a positive family history among probands. A single previous study was not population based. 2. The Division of Psychiatry of Ben Gurion University provides virtually all psychiatric services for a catchment area of 300,000 people. The authors reviewed the charts of all 236 treated bipolar I patients in 1991, and interviewed 177 of them with a modified FH-RDC. 3. 48% of probands had a family history of mental illness. 4. However, the present methods of ascertainment may have been insufficiently sensitive.