title: Evaluation of psychometric properties of Walking Impairment Questionnaire in overweight patients with osteoarthritis of knee.
abstract: This study tested the psychometric properties of the Walking Impairment Questionnaire (WIQ) in overweight patients with osteoarthritis (OA) of the knee. Internal consistency, test-retest reliability, and concurrent validity of the WIQ were measured. Used in a randomized clinical trial, the WIQ was one of the instruments completed by overweight adults with OA of the knee. A total of 105 patients completed the WIQ. Internal consistency of the WIQ was supported in this population with a Cronbach alpha total score of 0.97. Test-retest reliability scores were not different when subjects completed the WIQ 14 days apart (p > 0.05). The relationships were moderate between the WIQ subscales and other established measures, such as the 6-minute walk distance, stair climb and descend, and the Western Ontario and McMaster Universities (OA Index) questionnaire. After evaluating the psychometric properties of the WIQ, we found that it is a valid and reliable instrument to use in overweight patients with symptomatic OA of the knee.
authors: Center for Management of Complex Chronic Care, Edward Hines Jr VA Hospital, Hines, IL 60141, USA. eileen.collins@va.gov
authors: Eileen
authors: E
authors: Collins
authors: Susan
authors: S
authors: O'Connell
authors: Christine
authors: C
authors: Jelinek
authors: Scott
authors: S
authors: Miskevics
authors: Elly
authors: E
authors: Budiman-Mak
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000503:physiopathology*; D050177:Overweight; D011446:Prospective Studies; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014728:Veterans; D016138:Walking / Q000502:physiology*