Dynamic postural control correlates with activities of daily living and quality of life in patients with knee osteoarthritis

Abstract

Background Knee osteoarthritis (OA) negatively affects dynamic postural control, which is a basic function that individuals use to perform activities of daily living (ADL). The purpose of this study was to investigate the associations of center of pressure (COP) control during the transition from double-leg to single-leg standing with subjective assessments of ADL and quality of life (QOL) in patients with knee OA. Methods Thirty-six patients (29 females) with moderate-to-severe knee OA participated. Dynamic postural control was evaluated during the transition from double-leg to single-leg standing. Each patient stood on a force plate, lifted the less affected limb as fast as possible, and maintained single-leg standing with the more affected limb. The COP movements corresponding to anticipatory postural adjustment (APA) and transitional phases were assessed. The maximum displacement and peak velocity of the COP movements in the medial–lateral direction were calculated. The Knee Injury and Osteoarthritis Outcome Score (KOOS) was used for the subjective assessment of ADL and QOL. Pearson’s product correlation analysis was performed to investigate the associations of COP movements in the APA and transitional phases with KOOS-ADL and KOOS-QOL. Results In the APA phase, the maximum COP displacement was significantly correlated with KOOS-ADL (r = -0.353, P = 0.035) and KOOS-QOL (r = -0.379, P = 0.023). In the transitional phase, the maximum COP displacement and peak COP velocity were significantly correlated with KOOS-ADL (maximum displacement: r = 0.352, P = 0.035; peak velocity: r = 0.438, P = 0.008) and with KOOS-QOL (maximum displacement: r = 0.357, P = 0.032; peak velocity: r = 0.343, P = 0.040). Conclusions The present study showed that smaller COP movements in the APA phase and smaller and slower COP movements in the transitional phase correlated with poorer ADL and QOL conditions in patients with knee OA. These findings suggest that poor dynamic postural control is associated with poor ADL and QOL conditions in patients with moderate-to-severe medial knee OA. Conservative treatment for patients with knee OA may need to focus on dynamic postural control during the transition from double-leg to single-leg standing.

A review of center of pressure (COP) variables to quantify standing balance in elderly people: Algorithms and open‐access code*

“…The zero-crossing velocity variables are correlated with each other in each direction (R = 0.88) but may be more weakly correlated with other variables, especially with positional variables (R < 0.8), in the older population (Rasku et al, 2012). Peak COP velocity has also been previously correlated with the severity of knee osteoarthrosis during the transition task from double-leg to single-leg standing (Sabashi et al, 2021).…”

Non-invasive brain stimulation for osteoarthritis

“…As a common degenerative disease of the elderly, OA is becoming increasingly in many young individuals at present, and it is one of the major factors that affect the daily activities and QOL of patients ( Sabashi et al, 2021 ). Studies have shown that ( Paget et al, 2021 ) the QOL of young people is more affected by OA than that of older patients in ankle OA.…”

Impairment and characteristics of postural control sub-components in people with COPD: a scoping review

“…These difficulties have some consequences in patients' quality of life [118]. Some studies suggest that a performant postural control system is associated with a good realization of activities of daily living [119,120]. COPD patients with postural control impairment could experiment more difficulties in the realization of these tasks [86,90].…”