Similar familial underpinnings for full and subsyndromal pediatric bipolar disorder: A familial risk analysis

Objectives To examine the validity of subthreshold pediatric bipolar I disorder ( BP ‐I), we compared the familial risk for BP ‐I in the child probands who had either full BP‐I, subthreshold BP‐I, ADHD, or were controls that neither had ADHD nor bipolar disorder. Methods BP‐I probands were youth aged 6−17 years meeting criteria for BP ‐I, full (N=239) or subthreshold (N=43), and also included were their first‐degree relatives (N=687 and N=120,...