Accuracy and economic evaluation of screening tests for undiagnosed COPD among hypertensive individuals in Brazil

The study examined the accuracy and associated costs of various screening tests (administered alone or in combination), as compared with diagnostic spirometry, for detecting undiagnosed COPD in a sample of 1162 hypertensive patients aged ≥40 years in a primary care setting in Brazil. Screening tests included use of the Vitalograph COPD-6 electronic respiratory monitor, which was used to detect an FEV1/FEV6 ratio of <0.78.