Abstract:
BACKGROUND:Spirometry data predict mortality, but are less sensitive to detect dysfunction in small airways as compared to the slope of phase III (the N2 slope) of the single breath nitrogen test. The association between the N2 slope and mortality has been studied with conflicting results. In the present study the prognostic importance of the N2 slope was tested taking spirometry variables into account. METHODS:A systematic general population sample of 595 middle-aged men had a baseline investigation with lung function tests including spirometry and the N2 slope. Age, smoking, and anthropometry variables were registered. The cohort was followed up regarding survival for 38 years. RESULTS:The sample was subdivided by tertiles of the N2 slope. A proportional hazards regression analysis was performed for each group of covariates: anthropometric, smoking variables, and spirometry variables, after accounting for age. Covariates with significant impact on mortality and the highest chi-square levels were smoking habit score and forced expired volume in 1 s corrected for height. These variables, in addition to age and the N2 tertiles were entered into a final proportional hazards regression analysis. In this multivariate model, mortality was significantly related to age (p < .0001), smoking habit score (p < .0001) and the N2 tertiles (p = .0004), but not to FEV1 when N2 slope was allowed for in the model. CONCLUSIONS:Dysfunction in small airways as measured by the N2 slope is significantly associated with overall mortality in middle-aged men, and outrivals spirometry as a predictor in multivariate analysis.
journal_name
Respir Medjournal_title
Respiratory medicineauthors
Olofson J,Bake B,Bergman B,Svärdsudd Kdoi
10.1016/j.rmed.2016.01.002subject
Has Abstractpub_date
2016-03-01 00:00:00pages
75-80eissn
0954-6111issn
1532-3064pii
S0954-6111(16)30002-6journal_volume
112pub_type
杂志文章abstract:BACKGROUND:Little is known about trends in the utilization or complication rates of transbronchial lung biopsy, particularly in community hospitals. METHODS:We used the Healthcare Cost and Utilization Project Florida State Inpatient and State Ambulatory Surgical Databases to assess trends in transbronchial lung biopsy...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2012.08.008
更新日期:2012-11-01 00:00:00
abstract::Invariant natural killer T (NKT) cells might contribute to the amplified and prolonged T-cell immune response that characterizes sarcoidosis. Therefore, we want to investigate the frequency and distribution of pulmonary invariant NKT cells in corticosteroid-naïve patients with sarcoidosis. We used multi-parameter flow...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2009.11.008
更新日期:2010-04-01 00:00:00
abstract:INTRODUCTION:Primary ciliary dyskinesia (PCD) is a rare genetically heterogeneous disorder of motile cilia, which leads to recurrent and chronic airway infections. Detailed information about infection causing pathogens is scarce. With this study, we aimed to determine the prevalence and susceptibility of the most commo...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2019.08.009
更新日期:2019-09-01 00:00:00
abstract:BACKGROUND:IL-4 receptor alpha chain is crucial for the binding and signaling of IL-4, which mediates isotype switching and IgE production. The gene of IL-4 receptor alpha chain is a candidate gene for asthma and atopy. OBJECTIVES:To determine whether Ile50Val and Q576R polymorphisms of IL-4 receptor alpha chain gene ...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2006.04.004
更新日期:2007-01-01 00:00:00
abstract::In recent years, it has become increasingly important to get as much as possible information on clinical efficacy already in the early phases of drug development. For proof of concept (POC) studies testing novel anti-inflammatory drugs in asthma, there are several validated exacerbation models, inducing various aspect...
journal_title:Respiratory medicine
pub_type: 杂志文章,评审
doi:10.1016/j.rmed.2007.10.018
更新日期:2008-03-01 00:00:00
abstract::Malnutrition may be an extremely important complicating factor in patients with a variety of chronic lung diseases. The impact of malnutrition on lung disease and respiratory muscle function has been extensively studied in patients with chronic lung disease due to cystic fibrosis (CF). In patients with CF it appears t...
journal_title:Respiratory medicine
pub_type: 杂志文章,评审
doi:10.1016/0954-6111(93)90127-l
更新日期:1993-08-01 00:00:00
abstract:BACKGROUND:This study evaluated the dose-response and dosing interval of the novel long-acting muscarinic receptor antagonist (LAMA) GSK573719 in patients with COPD. METHODS:This randomized, double-blind, placebo-controlled, 3-way cross-over, incomplete block study evaluated 5 once-daily doses of GSK573719 (62.5-1000 ...
journal_title:Respiratory medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.rmed.2012.03.012
更新日期:2012-07-01 00:00:00
abstract:BACKGROUND:Physical activity and health status deteriorate early in the course of chronic obstructive pulmonary disease (COPD). This can only partially be explained by the degree of airflow limitation. Changes in (resting and dynamic) lung volumes are known to be associated with functional impairments and thus might in...
journal_title:Respiratory medicine
pub_type: 杂志文章,多中心研究
doi:10.1016/j.rmed.2013.02.017
更新日期:2013-06-01 00:00:00
abstract::Although the principles of asthma management are well established in Europe, the available data indicate that asthma in patients is not well controlled. Many patients derive incomplete benefit from their inhaled medication because they do not use inhaler devices correctly and this may compromise asthma control. The Ae...
journal_title:Respiratory medicine
pub_type: 杂志文章,评审
doi:10.1016/j.rmed.2006.01.008
更新日期:2006-09-01 00:00:00
abstract:BACKGROUND/PURPOSE:The diagnosis of patients with pulmonary infiltrates and human immunodeficiency virus (HIV) infection remains a challenge. In current clinical practice the gold standard for Pneumocystis jirovecii pneumonia (PCP) diagnosis remains the identification of the organism in bronco alveolar lavage (BAL) usi...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2014.09.017
更新日期:2014-11-01 00:00:00
abstract::The need for efficient use of resources in the provision of health care is now an accepted reality. Despite its economic significance, respiratory disease has been the subject of very few examples of the application of techniques of economic evaluation. There are a number of examples of cost-minimization studies, and ...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/s0954-6111(06)80169-1
更新日期:1991-09-01 00:00:00
abstract:BACKGROUND:Tracheal collapse is a weakness of the tracheal wall leading to expiratory central airway collapse of more than 50% compared to inspiration. It has previously been discussed whether the collapsibility of the greater airways is a stable or a dynamic condition. Indeed, other well-known lung diseases such as as...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2018.11.018
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:In COPD patients, hyperinflation impairs cardiac function. We examined whether lung deflation improves oxygen pulse, a surrogate marker of stroke volume. METHODS:In 129 NETT patients with cardiopulmonary exercise testing (CPET) and arterial blood gases (ABG substudy), hyperinflation was assessed with residu...
journal_title:Respiratory medicine
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.rmed.2011.07.012
更新日期:2012-01-01 00:00:00
abstract::The mandatory requirement to eliminate chlorofluorocarbons (CFCs) as propellants in pharmaceutical aerosols has provided the opportunity to enhance significantly the delivery of aerosol drugs to the respiratory tract. This randomized, parallel-group, double-blind, double-dummy, multicentre study was undertaken to asse...
journal_title:Respiratory medicine
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/s0954-6111(98)90214-1
更新日期:1998-06-01 00:00:00
abstract::The 72 kDa matrix metalloproteinase (MMP-2) and the 92 kDa matrix metalloproteinase (MMP-9), are type IV collagenases that have been implicated as important factors in cancer invasion and metastasis formation. We have used quantitative zymography and computer-assisted image analysis to measure the levels of MMP-9 and ...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1053/rmed.2000.0923
更新日期:2001-01-01 00:00:00
abstract::From about 1190 to the present day opposing views have been expressed about the effects of coughing in patients with asthma. Some accounts have stated that it brought relief and others that it exacerbated asthma, whereas others thought that it could have both effects. In the present investigation, 187 patients with a ...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/s0954-6111(06)80246-5
更新日期:1991-01-01 00:00:00
abstract::Limited knowledge exists about development of bronchial hyperresponsiveness (BHR) through adolescence. We aimed to assess changes in and risk factors for BHR in adolescence. From a Norwegian birth cohort 517 subjects underwent clinical examinations, structured interviews and methacholine challenges at age 10 and 16. B...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2011.09.013
更新日期:2012-02-01 00:00:00
abstract::The objective of this study was to evaluate the effect of lateral body position on gas exchange in patients with unilateral pleural effusion, with special reference to the influence of effusion volume. Thirty consecutive patients with unilateral pleural effusion, without evidence of parenchymal pulmonary involvement, ...
journal_title:Respiratory medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/0954-6111(95)90091-8
更新日期:1995-04-01 00:00:00
abstract:BACKGROUND:Alpha-1-antitrypsin deficiency (AATD) is significantly underdiagnosed. The early detection of AATD would enable affected persons to make lifestyle changes such as quitting smoking. It was the aim of the study to determine whether the combination of an awareness program with the offer of a cost-free diagnosti...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2007.02.024
更新日期:2007-08-01 00:00:00
abstract:BACKGROUND:Gas trapping suggesting small airway disease is observed in adult asthmatic suffering from severe asthma. The aim of the study was to assess whether gas trapping could be evidenced in asthmatic children with/without severe exacerbation and with/without symptoms during the past three months. METHODS AND PATI...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2010.05.005
更新日期:2010-08-01 00:00:00
abstract::Measurement of exhaled nitric oxide is widely used in respiratory research and clinical practice, especially in patients with asthma. However, interpretation is often difficult, due to common interfering factors, and little is known about interactions between factors. We assessed the influences and interactions of fac...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2008.02.012
更新日期:2008-07-01 00:00:00
abstract:BACKGROUND:COPD is a highly prevalent disease but underdiagnosed, undertreated and possibly under-recognized by patients. Limited information exists regarding patients' perception of COPD severity. We compared patients' general health status perception, degree of breathlessness and physical activity limitation with the...
journal_title:Respiratory medicine
pub_type: 杂志文章,多中心研究
doi:10.1016/j.rmed.2009.03.005
更新日期:2009-09-01 00:00:00
abstract:BACKGROUND:Gas6 protein is involved in pulmonary embolism (PE) and acute inflammation in animal models. METHODS:We enrolled 82 consecutive patients with acute dyspnea and suspected PE (Geneva score with high (HCP) or low/intermediate clinical probability (LICP)+D-dimer >or=0.5microg/mL) and 29 age-matched healthy volu...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2008.10.018
更新日期:2009-04-01 00:00:00
abstract:BACKGROUND:The aim of the present study was to estimate the societal costs and the key cost drivers for patients with severe asthma in Sweden. In addition, health-related quality of life (HRQOL) and morbidity of patients with severe asthma is described. METHODS:The study population comprised adults with severe asthma ...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2019.105860
更新日期:2020-02-01 00:00:00
abstract::We compare the adequacy of several titration procedures of oxygen flow in maintaining SpO(2) > 90% during the activities of daily life in patients with very severe COPD. Thirty-one very severe COPD patients undergoing oxygen-therapy were recruited. Three titration methods were randomly performed: (1) 6-min walking tes...
journal_title:Respiratory medicine
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.rmed.2012.06.021
更新日期:2012-11-01 00:00:00
abstract:OBJECTIVES:This randomized, double-blind, placebo-controlled, cross-over, Phase II dose-ranging study investigated the efficacy and safety of GP MDI (glycopyrronium administered by metered dose inhaler formulated using co-suspension delivery technology) compared with an open-label active comparator, salmeterol dry powd...
journal_title:Respiratory medicine
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.rmed.2018.04.013
更新日期:2018-06-01 00:00:00
abstract::Both albuterol and nedocromil sodium have been recognized to possess certain anti-inflammatory properties. However, there are no data on the impact of these drugs on the pathophysiology of the bronchial extracellular matrix in asthma characterized by enhanced tenascin (Tn) expression, known to occur proportional to th...
journal_title:Respiratory medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0954-6111(99)90086-0
更新日期:1999-07-01 00:00:00
abstract:INTRODUCTION AND AIM:Pseudomonas aeruginosa could acquire a mucoid phenotype due to mutations in mucA (mucoid Pseudomonas aeruginosa - mPA) that is a hallmark of poor prognosis in patients with bronchiectasis. Despite the higher prevalence of Pseudomonas aeruginosa in bronchiectasis, how mPA and non-mucoid Pseudomonas ...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/j.rmed.2019.06.012
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND:To analyse the relationship between symptoms at different times during the 24-hour day and outcomes in COPD. METHODS:Observational cross-sectional study in a patients from 7 Latin American countries. The frequency of symptoms in the morning, at night and during the day was explored by means of standardised ...
journal_title:Respiratory medicine
pub_type: 杂志文章,多中心研究
doi:10.1016/j.rmed.2017.11.018
更新日期:2018-01-01 00:00:00
abstract::Fifty-four members of two families were studied, nine of whom had familial spontaneous pneumothorax. The disease was inherited by autosomal-dominant type, with incomplete penetration and (or) variable expression. Five patients underwent bullectomy and parietal pleurectomy simultaneously on both sides via median sterno...
journal_title:Respiratory medicine
pub_type: 杂志文章
doi:10.1016/s0954-6111(08)80011-x
更新日期:1990-03-01 00:00:00