The objective of this study was to redesign the current grading of obstructive lung disease so
that it is clinically relevant and free of biases related to age, height, sex and ethnic group …

There is currently no consensus on the criteria for diagnosing chronic obstructive pulmonary
disease. This study evaluated the impact of different definitions of airway obstruction on the …

Aim: The prevalence of airway obstruction varies widely with the definition used. Objectives:
To study differences in the prevalence of airway obstruction when applying four international …

Objective: International consensus guidelines suggest that in asthma and chronic
obstructive pulmonary disease (COPD), measurements of FEV1 and PEF are equivalent in …

The clinical practice of medicine involves accurate history taking and appropriate clinical
examination, followed by the formulation of possible diagnoses to account for the patient's …

The diagnosis of chronic obstructive pulmonary disease (COPD) relies on demonstration of
airflow obstruction. Traditional spirometric indices miss a number of subjects with respiratory …

Background: Early detection of airflow obstruction is particularly important among young
adults because they are more likely to benefit from intervention. Using the forced expiratory …

Study objectives To evaluate the distribution of airways obstruction in a general population
sample. Methods Cross-sectional epidemiologic survey of a general population sample …

Background The choice between lower limit of normal or fixed value of forced expiratory
volume in one second/forced vital capacity ratio (FEV1/FVC)< 0.70 as the criterion for …

BACKGROUND: Although the statistically derived lower limit of normal (LLN) for the ratio of
FEV1 to FVC is considered superior to a fixed cutoff value (such as 0.70) for diagnosing …