Article

OBJECTIVE: To examine the association between pedometer-based ambulatory physical
activity (PA) and physical function in patients with knee osteoarthritis (OA).
DESIGN: Cross-sectional observational study.
SETTING: Institutional practice.
PARTICIPANTS: Participants in orthopedic clinics (N=207; age, 56-90y; 71.5%
women) with diagnosed radiographic knee OA (Kellgren/Lawrence [K/L] grade >/=1).
INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Ambulatory PA was
objectively measured as steps per day. Physical function was assessed using the
Japanese Knee Osteoarthritis Measure (JKOM) functional subcategory, 10-m walk,
Timed Up and Go (TUG), and 5-repetition chair stand (5CS) tests. RESULTS:
Patients walking <2500 steps/d had a low level of physical function with a slower
gait speed, longer TUG time, and worse JKOM functional score compared with those
who walk 2500 to 4999, 5000 to 7499, and >/=7500 steps/d adjusted for age, sex,
body mass index [BMI], and K/L grade. Ordinal logistic regression analysis
revealed that steps per day (continuous) was associated with better physical
function adjusted for age, sex, BMI, and K/L grade. These relationships were
still robust in sensitivity analyses that included patients with K/L grades >/=2
(n=140). CONCLUSIONS: Although increased ambulatory PA had a positive
relationship with better physical function, walking <2500 steps/d may be a simple
indicator for a decrease in physical function in patients with knee OA among
standard PA categories. Our findings might be a basis for counseling patients
with knee OA about their ambulatory PA and for developing better strategies for
improving physical function in sedentary patients with knee OA.
CI - Copyright (c) 2017 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS