Forced expiratory volume in one second: A novel predictor of work disability in subjects with suspected obstructive sleep apnea

Obstructive ventilatory defect with normal forced expiratory volume in one second/vital capacity ratio.

Serum respiratory virus antibodies: predictor of reduced one-second forced expiratory volume (FEV1) in Norwegian adults.

BACKGROUND The purpose of this cross-sectional study was to investigate whether the presence of serum complement antibodies was associated with reduced one-second forced expiratory volume (FEV1) in adults. METHODS From a stratified random sample of 18-73 year old adults, we performed measurements of serum complement fixing virus antibodies against influenza type A and B, parainfluenza type 1,...

Effort and the forced expiratory volume in one second (FEV).

1. The relationship between volumes expired and the maximum intrathoracic pressures developed within the first second of expiration was examined in a group of healthy subjects and patients with airways obstruction who exhaled with varying degrees of effort. 2. The body plethysmographic method was used to ensure that expirations started from total lung capacity. 3. Three different types of volum...

Forced expiratory volume in one second: why dichotomise?

Numerous epidemiological surveys have tried to evaluate the effects of exposures relevant to pulmonary disease.' A number of studies have analysed forced expiratory volume in one second (FEVI) using linear regression analysis, thus enabling adjustment for age, height, and sex as well as potential confounding variables. Within the last few years, studies analysing dichotomous FEV, variables with...

Sources of variation in forced expiratory volume in one second and forced vital capacity.

Published prediction equations for lung function differ considerably, but the components of population variation responsible for the differences are unknown. Data were analysed for 6,323 never-smoking adults who did not report wheeze or asthma, from 42 centres participating in the European Community Respiratory Health Survey. Means and components of variance were estimated for males and females...