Article

OBJECTIVE: To examine how self-reported pain- and fatigue-related activity
interference relates to symptoms and physical activity (PA) in daily life among
people with knee or hip osteoarthritis. DESIGN: Cross-sectional study with a
7-day repeated-measures assessment period. SETTING: General community.
PARTICIPANTS: Participants (N=154; mean age, 65y; 60% women [n=92]) with knee or
hip osteoarthritis and pain lasting >/=3 months. INTERVENTIONS: Not applicable.
MAIN OUTCOME MEASURES: Pain- or fatigue-related activity interference items on
the Brief Pain Inventory or Brief Fatigue Inventory, respectively, from baseline
survey, momentary pain and fatigue severity (measured 5times/d for 7d), and PA
measured with a wrist-worn accelerometer over 7 days. We hypothesized that
perception of pain- and fatigue-related activity interference would moderate the
association between symptoms (pain or fatigue) and PA. People with higher pain-
or fatigue-related activity interference were thought to have stronger negative
associations between momentary ratings of pain and fatigue and PA than did those
with lower activity interference. RESULTS: Pain-related activity interference
moderated the association between momentary pain and PA, but only in the first
part of the day. Contrary to expectation, during early to midday (from wake-up
time through 3 pm), low pain-related interference was associated with stronger
positive associations between pain and PA but high pain-related interference was
associated with a small negative association between pain and PA. Fatigue-related
activity interference did not moderate the relation between fatigue and activity
over the course of a day. CONCLUSIONS: Depending on a person's reported level of
pain-related activity interference, associations between pain and PA were
different earlier in the day.
Only those with high pain-related activity
interference had lower levels of PA as pain increased and only in the morning.
High pain-related activity interference may be important to address, particularly
to maintain PA early in the day despite pain.
CI - Copyright (c) 2016 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS