Exploration of the psychometric properties of the 33-item Hypomania Checklist - external assessment (HCL-33-EA)

Misdiagnosis of bipolar disorder (BD) is common in clinical practice, leading to inappropriate treatment and detrimental consequences. The 33-item Hypomania Checklist (HCL-33) is a newly developed screening instrument for hypomanic symptoms in patients with BD. The 33-item Hypomania Checklist-external assessment (HCL-33-EA) is a version of the HCL-33 for carers of patients with mood disorders. In this study, the psychometric properties of the...