Construct validity of the 9-Hole Peg Test and Purdue Pegboard Test in people with mild to moderately severe Parkinson's disease

Abstract

Objectives: To evaluate the construct validity of two dexterity measures, the 9-Hole Peg Test (9HPT) and Purdue Pegboard Test (PPT) in people with Parkinson's disease (PD). Design: Cross-sectional observational study. Setting: Testing was conducted at the university or in participants’ homes. Participants: Thirty community dwelling people with mild to moderately severe PD and no major upper limb comorbidities or cognitive impairments. Interventions: Pegboard tests were administered in the ‘on’ and ‘end-of-dose’ phases of participants’ PD medication cycles. Participants rated hand function with two self-report questionnaires – the Manual Ability Measure-36 (MAM-36) and a subset of upper limb ..