Article

OBJECTIVE: To examine the factor structure of the Patient Health Questionnaire-9,
a measure of depression, in persons with spinal cord injury (SCI). DESIGN:
Cross-sectional, confirmatory factor analytic study. SETTING: Community.
PARTICIPANTS: Data for 7296 persons with an SCI who had sustained their injury at
least 1 year prior to assessment and who had complete Patient Health
Questionnaire-9 data collected at a follow-up interview were drawn from the
National Spinal Cord Injury Statistical Center Database. INTERVENTIONS: None.
MAIN OUTCOME MEASURES: Factor structure of the Patient Health Questionnaire-9.
RESULTS: Confirmatory factor analysis indicated a marginal fit for the single
factor solution (root mean square error of approximation [RMSEA] = 0.086),
whereas the solution with 5 somatic items and 4 nonsomatic items had the best fit
(RMSEA = 0.054) among 2-factor models that used all 9 items. Of the models that
used fewer than 9 items, the best fit was for the 6-item solution with 3 somatic
items (sleep, appetite, and fatigue) and 3 nonsomatic items (feeling down,
feeling bad about self, and suicidal ideation; RMSEA = 0.043). Similar results
were found across the strata except for the Hispanic group (for whom no model fit
well). CONCLUSIONS: Given the results of this analysis that support a 2-factor
structure of the Patient Health Questionnaire-9 in persons with SCI, the next
step in this line of research is to validate each of these dimensions against
other ways of measuring depression.
CI - Copyright (c) 2011 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS