title: Reliability and validity of the 12-minute distance walk in patients with chronic obstructive pulmonary disease.
abstract: Validity and test-retest liability of the 12-minute distance (12MD) walk, a measure of functional status, were examined in patients with chronic obstructive pulmonary disease. Four tests were administered at weekly intervals. Performance increased (p < .01) over the first three tests. Test-retest reliability was r34 = .98 (df = 46) for tests 3 and 4. The 12MD walk correlated with the Sickness Impact Profile, Physical Dimension (r = -.45); forced expiratory volume in 1 second % predicted ( r = .40); maximal inspiratory pressure (PImax) (r = .52); and exercise-related breathlessness (r = -.49). Exercise-related breathlessness and PImax accounted for 42% of the variance. The validity and reliability of the 12MD walk were supported.
authors.affiliation: College of Nursing, University of Illinois at Chicago, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Larson
authors.forename: M K
authors.initials: MK
authors.lastname: Covey
authors.forename: C A
authors.initials: CA
authors.lastname: Vitalo
authors.forename: C G
authors.initials: CG
authors.lastname: Alex
authors.forename: M
authors.initials: M
authors.lastname: Patel
authors.forename: M J
authors.initials: MJ
authors.lastname: Kim
mesh_terms: D000368:Aged; D004417:Dyspnea / Q000209:etiology; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D015203:Reproducibility of Results; D012129:Respiratory Function Tests; D013997:Time Factors; D016138:Walking