The Impaired Balance Systems Identified by the BESTest in Older Patients With Knee Osteoarthritis.

Background: Balance decreases and activities of daily living (ADLs) deteriorate in older people with knee osteoarthritis (KOA); however, little is known about the systems underlying poor balance control and how those impaired systems are related to decreased ADL.

Objectives: To explore which balance systems are particularly impaired and to examine the relationship between physical ADL and balance in older people with KOA.

Design: Case-control study.