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- Chronic obstructive pulmonary disease (COPD) is a lung condition, which makes it hard to breathe, but is often preventable and treatable
- COPD affects some 210m people worldwide, its prevalence is increasing, and it costs billions in treatment and lost production
- By 2020 COPD is projected to be the 3rd leading cause of death worldwide
- Recently, scientific advances have benefitted COPD research
- But COPD researchers are challenged to provide compelling data in support of their studies
- COPD research would benefit from smart online communications strategies
- This could strengthen collaboration among globally dispersed scientists and people living with COPD, and expand the geographies from which COPD data are retrieved
Chronic Obstructive Pulmonary Disease (COPD) and the battle for breath
Chronic Obstructive Pulmonary Disease (COPD) is a common, preventable and treatable disorder, which affects 210m people worldwide. Its prevalence is increasing globally, and each year it causes some 3m deaths. Although COPD therapies have improved substantially in recent years, and benefit from advancing science, researchers are still challenged to provide compelling data in support of their studies. There is no definitive treatment for COPD, and more research is needed to improve the condition’s clinical management. There are regions of the world where the prevalence of COPD is increasing significantly, but where information about the disorder is sparse. This Commentary suggests that COPD research could benefit by enhancing the connectivity of globally dispersed scientists and people living with the disorder, and expanding the geographies from where COPD data are retrieved. Before suggesting ways to achieve this, let us describe COPD, and its vast and escalating burden.
COPD is an umbrella term used to describe common progressive lifetime diseases, which damage the lungs and airways, and make breathing difficult. Its prevalence is increasing especially in developing countries. It is the 4th leading cause of death worldwide and projected to be the 3rd by 2020. The causes of COPD are well known, but the nature of the condition is still not fully understood even though COPD therapies have improved significantly in recent years. The effects of COPD are persistent and progressive, but treatment can relieve symptoms, improve quality of life and reduce the risk of death. COPD impacts people differently, medications affect patients differently, and such differences make it challenging for doctors to identify patients who are at risk of a more rapidly progressing condition.
Although COPD is complex with different etiologies, pathogens and physiological effects, there are two main forms: (i) chronic bronchitis, which involves a long-term cough with mucus, and (ii) emphysema, which involves damage to the lungs over time. COPD also has significant extra-pulmonary effects, which include weight loss, nutritional abnormalities, skeletal muscle dysfunction, and it is also a major cause of psychological suffering. Further, COPD may promote heart failure because obstruction of the airways and damage to the lining of the lungs can result in abnormally low oxygen levels in the vessels inside the lungs. This creates excess strain on the right ventricle from pulmonary hypertension, which can result in heart failure.
In developed countries, the biggest risk factor for the development of COPD is cigarette smoking, whereas indoor pollutants are the major risk factor for the disease in developing nations. Not all smokers develop COPD and the reasons for disease susceptibility in these individuals have not been fully elucidated. Although the mechanisms underlying COPD remain poorly understood, the disease is associated with chronic inflammation, which is usually corticosteroid resistant, destruction of the airways, and lung parenchyma (functional tissue). There is no cure for COPD, but it is sometimes partially reversible with the administration of inhaled long-acting bronchodilators, and its progression can be slowed through smart maintenance therapy, in particular a cessation of smoking. People with stage 1 or 2 COPD lose at most a few years of life expectancy at age 65 compared with persons with no lung disease, in addition to any years lost due to smoking. Current smokers with stage 3 or 4 COPD lose about 6 years of life expectancy, in addition to the almost 4 years lost due to smoking.
The economic burden of COPD is vast and increasing, with attributed costs for hospitalizations, loss of productivity, and disability, in addition to medical care. In 2010, the condition’s annual cost in the US alone was estimated to be approximately US$50bn, which includes $20bn in indirect costs, and $30bn in direct health care expenditures. COPD treatment costs the UK more than £1.9bn each year. Over the past decade in the UK progress in tracking the disease has stagnated, and there is a wide variation in the quality of care.
The prevalence of COPD has increased dramatically due to a combination of aging populations, higher smoking prevalence, changing lifestyles and environmental pollution. In developed economies, COPD affects an estimated 8 to 10% of the adult population, 15 to 20% of the smoking population, and 50 to 80% of lung cancer patients with substantial smoking histories. For many years, COPD was considered to be a disease of developed nations, but its prevalence is increasing significantly in developing countries, where almost 90% of COPD deaths occur. Even though most of the research data on COPD comes from developed countries, accurate epidemiologic data on the condition are challenging and expensive to collect. There is a dearth of systematically collected COPD prevalence data from developing nations, and a paucity of COPD studies in Africa, SE Asia and the Eastern Mediterranean region. Most of the available prevalence estimates from low- to middle-income countries are not based on spirometry testing (the internationally accepted gold standard for the diagnosis of COPD, which measures lung capacity). Hence, the available COPD data from developing countries cannot be interpreted reliably in a global context, and more data from these regions are necessary to extend and support further studies.
Chronic Obstructive Pulmonary Disease (COPD)
COPD is an umbrella term used to describe common progressive lifetime diseases, which damage the lungs and airways, and make breathing difficult. Its prevalence is increasing especially in developing countries. It is the 4th leading cause of death worldwide and projected to be the 3rd by 2020. The causes of COPD are well known, but the nature of the condition is still not fully understood even though COPD therapies have improved significantly in recent years. The effects of COPD are persistent and progressive, but treatment can relieve symptoms, improve quality of life and reduce the risk of death. COPD impacts people differently, medications affect patients differently, and such differences make it challenging for doctors to identify patients who are at risk of a more rapidly progressing condition.
Although COPD is complex with different etiologies, pathogens and physiological effects, there are two main forms: (i) chronic bronchitis, which involves a long-term cough with mucus, and (ii) emphysema, which involves damage to the lungs over time. COPD also has significant extra-pulmonary effects, which include weight loss, nutritional abnormalities, skeletal muscle dysfunction, and it is also a major cause of psychological suffering. Further, COPD may promote heart failure because obstruction of the airways and damage to the lining of the lungs can result in abnormally low oxygen levels in the vessels inside the lungs. This creates excess strain on the right ventricle from pulmonary hypertension, which can result in heart failure.
In developed countries, the biggest risk factor for the development of COPD is cigarette smoking, whereas indoor pollutants are the major risk factor for the disease in developing nations. Not all smokers develop COPD and the reasons for disease susceptibility in these individuals have not been fully elucidated. Although the mechanisms underlying COPD remain poorly understood, the disease is associated with chronic inflammation, which is usually corticosteroid resistant, destruction of the airways, and lung parenchyma (functional tissue). There is no cure for COPD, but it is sometimes partially reversible with the administration of inhaled long-acting bronchodilators, and its progression can be slowed through smart maintenance therapy, in particular a cessation of smoking. People with stage 1 or 2 COPD lose at most a few years of life expectancy at age 65 compared with persons with no lung disease, in addition to any years lost due to smoking. Current smokers with stage 3 or 4 COPD lose about 6 years of life expectancy, in addition to the almost 4 years lost due to smoking.
The economic burden of COPD is vast and increasing, with attributed costs for hospitalizations, loss of productivity, and disability, in addition to medical care. In 2010, the condition’s annual cost in the US alone was estimated to be approximately US$50bn, which includes $20bn in indirect costs, and $30bn in direct health care expenditures. COPD treatment costs the UK more than £1.9bn each year. Over the past decade in the UK progress in tracking the disease has stagnated, and there is a wide variation in the quality of care.
Prevalence
The prevalence of COPD has increased dramatically due to a combination of aging populations, higher smoking prevalence, changing lifestyles and environmental pollution. In developed economies, COPD affects an estimated 8 to 10% of the adult population, 15 to 20% of the smoking population, and 50 to 80% of lung cancer patients with substantial smoking histories. For many years, COPD was considered to be a disease of developed nations, but its prevalence is increasing significantly in developing countries, where almost 90% of COPD deaths occur. Even though most of the research data on COPD comes from developed countries, accurate epidemiologic data on the condition are challenging and expensive to collect. There is a dearth of systematically collected COPD prevalence data from developing nations, and a paucity of COPD studies in Africa, SE Asia and the Eastern Mediterranean region. Most of the available prevalence estimates from low- to middle-income countries are not based on spirometry testing (the internationally accepted gold standard for the diagnosis of COPD, which measures lung capacity). Hence, the available COPD data from developing countries cannot be interpreted reliably in a global context, and more data from these regions are necessary to extend and support further studies.
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