Article

OBJECTIVE: To identify predictors of pain and disability in knee osteoarthritis.
DESIGN: A one-year prospective analysis of determinants of pain and functioning
in knee osteoarthritis.
STUDY SETTING: Primary care providers in a medium-sized
city. PATIENTS: A total of 111 patients aged from 35 to 75 with clinical symptoms
and radiographic grading (Kellgren-Lawrence 2-4) of knee osteoarthritis who
participated in a randomized controlled trial.
MAIN MEASURES: The outcome
measures were self-reported pain and function, which were recorded at 0, 3 and 12
months. Disease-specific pain and functioning were assessed using the pain and
function subscales of the Western Ontario and McMaster Universities (WOMAC)
Osteoarthritis Index. Generic physical and mental functioning were assessed using
the RAND-36 subscales for function, and physical and mental component summary
scores. Possible baseline predictors for these outcomes were 1) demographic,
socioeconomic and disease-related variables, and 2) psychological measures of
resources, distress, fear of movement and catastrophizing. RESULTS: Multivariate
linear mixed model analyses revealed that normal mood at baseline measured with
the Beck Anxiety Inventory predicted significantly better results in all measures
of pain (WOMAC P=0.02) and function (WOMAC P=0.002, RAND-36 P=0.002) during the
one-year follow-up. Psychological resource factors (pain self-efficacy P=0.012,
satisfaction with life P=0.002) predicted better function (RAND-36). Pain
catastrophizing predicted higher WOMAC pain levels (P=0.013), whereas fear of
movement (kinesiophobia) predicted poorer functioning (WOMAC P=0.046, RAND-36
P=0.024). CONCLUSIONS: Multiple psychological factors in people with knee
osteoarthritis pain are associated with the development of disability and longer
term worse pain.
CI - (c) The Author(s) 2015.

Langue : ANGLAIS