Key result
The visual analogue scale correlated closely with the Borg scale (r = 0.99) when scaling the sense of effort to breathe during exercise in patients with stable chronic obstructive pulmonary disease.
Why the study?
Does the visual analogue scale correlate with the Borg category scale for quantitating the sense of effort to breathe during exercise in patients with COPD?
Cross-Sectional (n=6)
Does the visual analogue scale correlate with the Borg category scale for quantitating the sense of effort to breathe during exercise in patients with COPD?
Answers are grounded in this paper and cite their sources.
The visual analogue scale is a reproducible tool that correlates closely with the Borg score for measuring the sense of effort to breathe during exercise in COPD patients.
Several different scaling techniques, i.e., Borg category (BC) and visual analogue (VA) scales have been used to quantitate the intensity of the respiratory sensations elicited during exercise, but their relationship is unclear. Six subjects with stable chronic obstructive lung disease (FEV1 = 1.2 +/- 0.1 SE L) simultaneously rated the sense of effort to breathe with both BC and VA scales during progressive, maximal exercise tests performed three to five times on a cycle ergometer. The VA scores correlated linearly with minute ventilation in all subjects in all trials (r = 0.98 +/- 0.01), and when converted to common units (i.e., Z scores) correlated closely with simultaneous scores obtained using the Borg scale (r = 0.99 +/- 0.01). Furthermore, VA scores varied minimally over several trials. Coefficient of variation for the maximal VA scores was 6 +/- 1%, which was similar to the variation in maximal Borg score (i.e., 3 +/- 1%). We conclude that the visual analogue scale is reproducible and correlates closely with the Borg score when scaling the sense of effort to breathe during exercise in subjects with stable chronic obstructive pulmonary disease.
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Muza et al. (1990) conducted a cross-sectional in Chronic Obstructive Pulmonary Disease (n=6). Visual analogue (VA) scale vs. Borg category (BC) scale was evaluated on Correlation between visual analogue scores and Borg scale scores (r = 0.99). The visual analogue scale correlated closely with the Borg scale (r = 0.99) when scaling the sense of effort to breathe during exercise in patients with stable chronic obstructive pulmonary disease.
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