Active clinical trials for "Pulmonary Disease, Chronic Obstructive"

Patients with chronic obstructive pulmonary disease (COPD) have an increased risk of cardiovascular disease,osteoporosis, muscle wasting and diabetes mellitus. Cardiovascular disease is a major cause of death in such patients and it may be related to excess stiffening of the walls of major arteries, such as the aorta, and it has been suggested to represent premature aging. However, there is little known of the development of these problems, which were previously considered to be due to smoking and which is now known not to be the only factor. The investigators will study a large group of patients with mild to very severe airflow obstruction based on the NICE 2010 classification of severity and a matched comparator group free of COPD. This study involves three assessments of the development of the complications of COPD over a five year period. The key measure will be the rate of change in the aortic wall stiffness, an accepted indicator of the risk of heart disease. Changes in wall stiffness will be related to the severity of lung disease; other known cardiovascular risk factors, such as high blood pressure, increased blood cholesterol and to cardiovascular events including heart attacks and death; and to the presence of other complications, such as osteoporosis, muscle wasting and diabetes mellitus. These measures will be analysed in the context of changes in bodywide inflammation and metabolic function and the changes in the rate of ageing. This increased knowledge of interacting factors in the complications of COPD is likely to lead to studies of treatments to avoid their development.

This is a longitudinal observational study to identify and validate protein biomarkers for COPD (chronic obstructive pulmonary diseases) and cardiovascular disease in smokers and ex-smokers attending primary care. Special emphasize is to correlate biomarkers to different phases of COPD, to progression of the disease, and to treatment of the disease. Furthermore, linkage between COPD, cardiovascular disease, and lung cancer will be investigated by identifying protein biomarkers.

The purpose of this study is to investigate the role of endothelial dysfunction in chronic obstructive pulmonary disease.

This study is an observational multicenter descriptive study. The study will be conducted in primary outpatient medical institutions in different cities of the RF. Primary care doctors who are primary contact for greater part of the population in RF including COPD patients will be invited as investigators. This observational descriptive study will be conducted within the routine practice of outpatient institutions. Since spirometry is not an integral part of the current all-round clinical practice, only those sites where spirometry test is routinely used in examination of patients with COPD risk factors and when monitoring condition of COPD patients will take part in the study. Thus the decision about spirometry in every study subject will be determined only by the existing treatment approaches.

The overall hypotheses of this proposal are that discrete phenotypes of HIV Chronic Obstructive Pulmonary disease (COPD) differ in their trajectories, biomarkers, and risk factors and that persistent viral infection including residual HIV is linked to HIV COPD.

Patients with Chronic Obstructive Lung Disease (COPD) often develop muscle problems, particularly in their legs which makes them more limited in what they can do. The Short Physical Performance Battery (SPPB) is a simple test of standing balance, usual walking speed and ability to stand from a chair. The SPPB may be a useful measure to predict leg function. This study aims to evaluate whether the SPPB is comparable with current exercise tests used in COPD patients, and whether it is useful in predicting disability, death and health resource usage over time.

The sensitivity of a person's cough reflex can be measured by getting them to breathe in (inhale) irritant chemicals. There are different methods by which subjects are asked to inhale these chemicals, either by taking one deep breath in, or by asking them to just continue to take a number of breaths. The purpose of this clinical research study is to see if the coughing responses are different in healthy people and people with respiratory problems that make them cough when they are given these chemicals in these two methods.

Many studies have evaluated the viability of measuring the pulmonary vascular resistance (PVR) by non-invasive methods in patients with pulmonary hypertension, pulmonary thromboembolism, ischemic cardiopathy and valvular disease. The investigators have not found other studies which evaluate the PVR in elderly patients with COPD. The hypothesis is that in patients with COPD, the severity of obstruction, expressed by GOLD class, is associated with an increase of PVR.

The objectives were to collect information on vital status and pulmonary medication use at the predicted exit date for patients who participated in two one-year trials and withdrew prematurely. The primary objective was to ascertain the vital status (dead or alive) of these patients in the time interval between the patients' withdrawal from the trial and their predicted exit date (i.e: 48 weeks from first intake of randomised treatment + 30 days). The secondary objective was to collect information on classes of pulmonary medication and some other specified pulmonary interventions used by these prematurely discontinued patients at the time of their predicted exit date (i.e 48 weeks from the first intake of randomised treatment + 30 days) or at date of death (if this occurred during the time interval of interest, i.e 48 weeks from the first intake of randomised treatment + 30 days).

Reports suggest that the Medicaid population includes a higher percentage of smokers than the general population. A high prevalence of smokers in a population is likely to lead to a higher burden of chronic obstructive pulmonary disease (COPD). Few studies have evaluated the economic burden of COPD in a Medicaid population. The objective of this observational, retrospective cohort study is to estimate the economic burden of COPD in subjects with a COPD diagnosis who are enrolled in Medicaid and are receiving maintenance treatment covered by Medicaid. Specifically, the null hypothesis for the primary outcome measure is that no difference is observed in all-cause costs between subjects with and without COPD. The test hypothesis is that there is a difference in all-cause costs between subjects with and without COPD. Secondary outcomes to be evaluated include all-cause resource use and COPD-related costs for the COPD cohort. The study uses a medical and pharmacy administrative claims database called MarketScan Medicaid Database that contains the medical, surgical, and prescription drug experience of nearly 7 million Medicaid recipients. This analysis will use data from 8 states.