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Isr Med Assoc J. 2006 Jul;8(7):460-3.

Assessment of functional capacity in patients with chronic obstructive pulmonary disease: correlation between cardiopulmonary exercise, 6 minute walk and 15 step exercise oximetry test.

Author information

1
Pulmonary Institute, Kaplan Medical Center, Rehovot, Israel. daniel_s@clalit.org.il

Abstract

BACKGROUND:

Different exercise tests are used to evaluate the functional capacity in chronic obstructive pulmonary disease. The cardiopulmonary exercise test is considered the gold standard, but the 6 minute walk and the 15 step exercise oximetry test are considerably less expensive.

OBJECTIVES:

To determine whether reliable data could be obtained at lower cost.

METHODS:

The study sample consisted of 50 patients with mild to severe stable COPD. All underwent pulmonary function test and the cardiopulmonary exercise test, 6 minute walk and 15 step exercise oximetry test as part of their regular follow-up visit. Functional capacity was graded according to each test separately and the functional capacities obtained were correlated.

RESULTS:

The results showed that most of the patients had severe COPD according to pulmonary function tests (mean forced expiratory volume in the first second 46.3 +/- 19.9% of predicted value). There was a good correlation between the cardiopulmonary exercise test and the 6 minute walk functional capacity classes (r = 0.44, P = 0.0013). We did not find such correlation between the 15 step exercise oximetry test and the cardiopulmonary exercise test (r = 0.07, P = 0.64).

CONCLUSIONS:

The study shows that the 6 minute walk is a reliable and accurate test in the evaluation of functional capacity in COPD patients.

PMID:
16889159
[Indexed for MEDLINE]
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