Linked Life Data

1626820

Source:http://linkedlifedata.com/resource/pubmed/id/1626820

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-8-7
pubmed:abstractText
The purpose of this study was to evaluate the reproducibility of visual analog scale ratings of the effort to breathe (VASe) and the degree of discomfort evoked by breathing (VASd) in patients with chronic obstructive pulmonary disease (COPD) during exercise. Six subjects with moderately severe COPD (FEV1 = 1.12 +/- 0.29 L, FEV1/FVC = 44 +/- 4%) underwent progressive incremental exercise testing to a symptom-limited maximum every week for 8 wk. VASe and VASd were highly correlated in each subject (r = 0.99 +/- 0.01). The slope of the VASd/VASe relationship for all trials in all subjects was not significantly different from 1, indicating that our subjects were rating a common sensation with the two scales. VASe at maximal exercise was reproducible in every subject; the within-subject coefficient of variation (CV) was 6% (range, 2 to 10%) and compared favorably with physiologic indices: 7% (range, 3 to 12%) for oxygen consumption and 10% (range, 5 to 16%) for minute ventilation (VI). In contrast, submaximal VAS ratings were highly variable. At 66% of the maximal work load, the within-subject CV for VASe was 21% (range, 11 to 28%) compared with 6% (range, 4 to 7%) for VO2 (p less than 0.003) and 10% (range, 5 to 16%) for VI (p less than 0.01). VASe correlated linearly with VI and VO2 in all subjects in all trials. However, within an individual subject the slope and position of these relationships varied widely between trials.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0003-0805
pubmed:author
pubmed:issnType
Print
pubmed:volume
146
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
82-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Reproducibility of visual analog scale measurements of dyspnea in patients with chronic obstructive pulmonary disease.
pubmed:affiliation
Division of Pulmonary Medicine, State University of New York, Buffalo 14215.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't