A clinimetric evaluation of the problem behaviors assessment short form (PBA-s) within the context of the Huntington's disease integrated staging system (HD-ISS).

While the PBA-s demonstrates adequate internal consistency, our results revealed high rates of non-endorsement (i.e., item total scores = 0) and a variable factor structure with disease progression. Thus, the PBA-s may not distinguish mild changes in behavioral symptoms that might occur in early HD-ISS stages of disease.