Prevalence of chronic cough, its risk factors and population attributable risk in the Burden of Obstructive Lung Disease (BOLD) study: a multinational cross-sectional study.

Background: Chronic cough is a common respiratory symptom with an impact on daily activities and quality of life. Global prevalence data are scarce and derive mainly from European and Asian countries and studies with outcomes other than chronic cough. In this study, we aimed to estimate the prevalence of chronic cough across a large number of study sites as well as to identify its main risk factors using a standardised protocol and definition. Methods: We analysed cross-sectional data from 33,983 adults (≥40 years), recruited between Jan 2, 2003 and Dec 26, 2016, in 41 sites (34 countries) from the Burden of Obstructive Lung Disease (BOLD) study. We estimated the prevalence of chronic cough for each site accounting for sampling design. To identify risk factors, we conducted multivariable logistic regression analysis within each site and then pooled estimates using random-effects meta-analysis. We also calculated the population attributable risk (PAR) associated with each of the identifed risk factors. Findings: The prevalence of chronic cough varied from 3% in India (rural Pune) to 24% in the United States of America (Lexington,KY). Chronic cough was more common among females, both current and passive smokers, those working in a dusty job, those with a history of tuberculosis, those who were obese, those with a low level of education and those with hypertension or airflow limitation. The most influential risk factors were current smoking and working in a dusty job. Interpretation: Our findings suggested that the prevalence of chronic cough varies widely across sites in different world regions. Cigarette smoking and exposure to dust in the workplace are its major risk factors. Funding: Wellcome Trust.

Chronic airflow obstruction and ambient particulate air pollution.

Smoking is the most well-established cause of chronic airflow obstruction (CAO) but particulate air pollution and poverty have also been implicated. We regressed sex-specific prevalence of CAO from 41 Burden of Obstructive Lung Disease study sites against smoking prevalence from the same study, the gross national income per capita and the local annual mean level of ambient particulate matter (PM2.5) using negative binomial regression. The prevalence of CAO was not independently associated with PM2.5 but was strongly associated with smoking and was also associated with poverty. Strengthening tobacco control and improved understanding of the link between CAO and poverty should be prioritised.

Prevalence and Population-Attributable Risk for Chronic Airflow Obstruction in a Large Multinational Study.

Rationale: The Global Burden of Disease program identified smoking and ambient and household air pollution as the main drivers of death and disability from chronic obstructive pulmonary disease (COPD). Objectives: To estimate the attributable risk of chronic airflow obstruction (CAO), a quantifiable characteristic of COPD, due to several risk factors. Methods: The Burden of Obstructive Lung Disease study is a cross-sectional study of adults, aged ≥40, in a globally distributed sample of 41 urban and rural sites. Based on data from 28,459 participants, we estimated the prevalence of CAO, defined as a postbronchodilator FEV1-to-FVC ratio less than the lower limit of normal, and the relative risks associated with different risk factors. Local relative risks were estimated using a Bayesian hierarchical model borrowing information from across sites. From these relative risks and the prevalence of risk factors, we estimated local population attributable risks. Measurements and Main Results: The mean prevalence of CAO was 11.2% in men and 8.6% in women. The mean population attributable risk for smoking was 5.1% in men and 2.2% in women. The next most influential risk factors were poor education levels, working in a dusty job for ≥10 years, low body mass index, and a history of tuberculosis. The risk of CAO attributable to the different risk factors varied across sites. Conclusions: Although smoking remains the most important risk factor for CAO, in some areas, poor education, low body mass index, and passive smoking are of greater importance. Dusty occupations and tuberculosis are important risk factors at some sites.

Prostaglandin E2 decrease in induced sputum of hypersensitive asthmatics during oral challenge with aspirin.

BACKGROUND: A special regulatory role for prostaglandin E2 (PGE2 ) has been postulated in nonsteroidal anti-inflammatory drug (NSAID)-exacerbated respiratory disease (NERD). OBJECTIVE: To investigate the effect of systemic aspirin (acetylsalicylic acid) administration on airway PGE2 biosynthesis in induced sputum supernatant (ISS) among subjects with NERD or aspirin-tolerant asthma with chronic rhinosinusitis with nasal polyposis (ATA-CRSwNP), as well as healthy controls (HC). METHODS: Induced sputum (IS) was collected from patients with NERD (n = 26), ATA-CRSwNP (n = 17), and HC (n = 21) at baseline and after aspirin challenge. Sputum differential cell count and IS supernatant (ISS) levels of prostanoids, PGE2 , 8-iso-PGE2 , tetranor-PGE-M, 8-iso-PGF2 α, and leukotriene C4 , D4 , and E4 , were determined using mass spectrometry. Urinary excretion of LTE4 was measured by ELISA. RESULTS: NERD subjects had elevated sputum eosinophilic count as compared to ATA-CRSwNP and HC (median NERD 9.1%, ATA-CRSwNP 2.1%, and HC 0.4%; P < 0.01). Baseline ISS levels of PGE2 were higher in asthmatics as compared to HC at baseline (NERD vs HC P = 0.04, ATA-CRSwNP vs HC P < 0.05). Post-challenge ISS levels of PGE2 compared to baseline significantly decreased in NERD and HC (P < 0.01 and P = 0.01), but not in ATA-CRSwNP. In NERD, a similar decrease in PGE2 as in HC resulted from 2.8 times lower dose of aspirin. CONCLUSION: Aspirin-precipitated bronchoconstriction is associated with a decrease in airway PGE2 biosynthesis. These results support the mechanism of PGE2 biosynthesis inhibition as a trigger for bronchoconstriction in NERD.

Symptoms of chronic bronchitis in individuals without chronic obstructive pulmonary disease: prevalence, burden, and risk factors in southern Poland.

Introduction Chronic bronchitis (CB) symptoms are commonly reported in individuals without chronic obstructive pulmonary disease (COPD), but CB is rarely diagnosed in this population. Objectives We aimed to determine the prevalence and burden of CB, as well as its risk factors, in a population of patients without COPD. Patients and methods Data from the "Health Action" program (a lung cancer prevention and health care improvement program conducted in Proszowice County, Poland) were used. All county inhabitants aged 40 years or older without COPD were invited to participate. As part of the program, a questionnaire was administered to assess CB symptoms and risk factors. Spirometry at baseline and after the bronchodilator test was also performed. Results CB symptoms were present in 9.1% of the 3558 participants. The prevalence of CB in the study population was 7.12% (95% CI, 6.70-7.56). Patients with CB had more dyspnea and more often received medical treatment for lung disease or were hospitalized for respiratory disorders than patients without CB. CB was associated with worse lung function and a worse score in the modified Medical Research Council Dyspnea Scale even after adjustment for possible confounders. In a multivariate analysis, male sex, age over 70 years, current smoking, passive exposure to tobacco smoke, gas or wood heating, occupational exposure to chemical agents, lower forced expiratory volume in 1 second, and asthma correlated with an increased risk of CB. Conclusions CB symptoms are common in individuals without COPD aged 40 years or older and are associated with more dyspnea irrespective of lung function and comorbidities.

Coexistence of Chronic Bronchitis in Chronic Obstructive Lung Disease.

The incidence of chronic obstructive pulmonary disease (COPD) is on the rise worldwide. Chronic bronchitis is a frequent accompaniment of COPD, which increases the burden of COPD in affected individuals. The aim of this study was to characterize the phenotype of chronic bronchitis in COPD patients. The study was based on the survey data retrospectively retrieved from the Action Health-Lung Cancer Prophylaxis and Health Care Improvement screening program that concerned all the inhabitants, aged over 40, of the Proszowice administrative region situated in the Lesser Poland Voivodeship in southern Poland. Participants with the symptoms suggestive of a lung disease were subject to further evaluation. The findings were that 546 (13.3%) out of the 4105 individuals displayed spirometry features of COPD. Symptoms of chronic bronchitis were present in 92 (16.8%) out of the COPD afflicted persons. Chronic bronchitis was commoner in current smokers and its incidence increased with increasing severity of airway obstruction. In multivariate analysis, chronic bronchitis was independently related to lower FEV1, FVC, FEV1/FVC, and to dyspnea. In regression model, factors related to increased risk of chronic bronchitis were current smoking, asthma, and lower lung function. We conclude that COPD with coexisting chronic bronchitis is linked to severer dyspnea and worse lung function. Current smoking, asthma, and lower lung function are related to increased risk of chronic bronchitis accompanying COPD.

Prevalence and burden of chronic bronchitis symptoms: results from the BOLD study.

We studied the prevalence, burden and potential risk factors for chronic bronchitis symptoms in the Burden of Obstructive Lung Disease study.Representative population-based samples of adults aged ≥40 years were selected in participating sites. Participants completed questionnaires and spirometry. Chronic bronchitis symptoms were defined as chronic cough and phlegm on most days for ≥3 months each year for ≥2 years.Data from 24 855 subjects from 33 sites in 29 countries were analysed. There were significant differences in the prevalence of self-reported symptoms meeting our definition of chronic bronchitis across sites, from 10.8% in Lexington (KY, USA), to 0% in Ile-Ife (Nigeria) and Blantyre (Malawi). Older age, less education, current smoking, occupational exposure to fumes, self-reported diagnosis of asthma or lung cancer and family history of chronic lung disease were all associated with increased risk of chronic bronchitis. Chronic bronchitis symptoms were associated with worse lung function, more dyspnoea, increased risk of respiratory exacerbations and reduced quality of life, independent of the presence of other lung diseases.The prevalence of chronic bronchitis symptoms varied widely across the studied sites. Chronic bronchitis symptoms were associated with significant burden both in individuals with chronic airflow obstruction and those with normal lung function.

Pulmonary prevention program in the Proszowice county: description and results.

INTRODUCTION: In the Proszowice county, both lung cancer and chronic obstructive pulmonary disease (COPD) are more common in comparison with other regions of Poland. The purpose of this study was to provide a report on a prevention program carried out in the area to reduce the burden of COPD and lung cancer in the region. MATERIAL AND METHODS: The program consisted of the following: active prevention - questionnaire survey offered to every county inhabitant aged at least 40 and chest X-ray and spirometry performed in selected subjects; and passive prevention - covering multiple educational activities promoting healthy lifestyle. Data obtained from questionnaire survey and spirometry were further analyzed. RESULTS: Education program covered all local children aged 13-15, a majority of adolescents and a significant proportion of adult inhabitants of the county. Questionnaire data were obtained from 14,455 subjects (about 70% of county inhabitants). On the basis of the questionnaire results, the participants were selected to undergo spirometry (5,816 subjects) and chest X-ray (5,514 subjects). Current smokers constituted 24.2% of the total number of participants (33.3% of men and 16.8% of women). Electronic cigarettes were currently used by 0.65% of the subjects. Negative impact of occupational exposures (including farming) on lung function and the presence of respiratory symptoms was observed. Basing on post-bronchodilator spirometry, COPD was diagnosed in 13.2% of the subjects. Physician's diagnosis of asthma was reported by 7.2%. CONCLUSION: Educational activities and questionnaire-based study were targeted at and reached the majority of the county inhabitants. The study provided data on the prevalence and risk factors of COPD, asthma and respiratory symptoms in the Proszowice region.

Clinical and biochemical factors for response to aspirin desensitization in aspirin-induced asthma patients ­ pilot study.

Aspirin desensitization is considered to be an effective and well-tolerated therapy for patients with Non-steroidal anti-inflammatory(NSAIDs)-Exacerbated Respiratory Disease (NERD). The aim of the present study was to investigate the influence of aspirin desensitization on inflammatory cell count in induced sputum and nasal lavage in fifteen NERD individuals subjected to one-year aspirin therapy. The decrease in induced sputum count of eosinophils and macrophages was observed. Clinical efficacy of aspirin therapy in improving nasal symptoms and quality of life in NERD patients was also confirmed.

Susceptibility to chronic mucus hypersecretion, a genome wide association study.

BACKGROUND: Chronic mucus hypersecretion (CMH) is associated with an increased frequency of respiratory infections, excess lung function decline, and increased hospitalisation and mortality rates in the general population. It is associated with smoking, but it is unknown why only a minority of smokers develops CMH. A plausible explanation for this phenomenon is a predisposing genetic constitution. Therefore, we performed a genome wide association (GWA) study of CMH in Caucasian populations. METHODS: GWA analysis was performed in the NELSON-study using the Illumina 610 array, followed by replication and meta-analysis in 11 additional cohorts. In total 2,704 subjects with, and 7,624 subjects without CMH were included, all current or former heavy smokers (≥20 pack-years). Additional studies were performed to test the functional relevance of the most significant single nucleotide polymorphism (SNP). RESULTS: A strong association with CMH, consistent across all cohorts, was observed with rs6577641 (p = 4.25×10(-6), OR = 1.17), located in intron 9 of the special AT-rich sequence-binding protein 1 locus (SATB1) on chromosome 3. The risk allele (G) was associated with higher mRNA expression of SATB1 (4.3×10(-9)) in lung tissue. Presence of CMH was associated with increased SATB1 mRNA expression in bronchial biopsies from COPD patients. SATB1 expression was induced during differentiation of primary human bronchial epithelial cells in culture. CONCLUSIONS: Our findings, that SNP rs6577641 is associated with CMH in multiple cohorts and is a cis-eQTL for SATB1, together with our additional observation that SATB1 expression increases during epithelial differentiation provide suggestive evidence that SATB1 is a gene that affects CMH.

Modulation of inflammatory and hemostatic markers in obstructive sleep apnea patients treated with mandibular advancement splints: a parallel, controlled trial.

STUDY OBJECTIVE: Obstructive sleep apnea (OSA) is associated with systemic inflammation and a hypercoagulable state. The current study aim was to investigate whether mandibular advancement splint (MAS) therapy affects inflammatory and hemostatic parameters in patients with mild-to-moderate OSA. METHODS: Twenty-two patients with mild-to-moderate OSA and 16 control subjects were studied. OSA subjects were treated with a titratable MAS for 6 months. Baseline plasma C-reactive protein, interleukin-1ß, interleukin-10, interleukin-6, P-selectin, fibrinogen, D-dimer, plasminogen activator inhibitor-1 (PAI-1), thrombin-antithrombin complex, activated thrombin-activatable fibrinolysis inhibitor (TAFIa), 6-keto-PGF1α, glucose, and fibrin clot lysis time (CLT) were measured in all subjects. After 3 months of MAS therapy, measurements were repeated for the 22 patients, and after 6 months all measurements were repeated for all study subjects. RESULTS: MAS treatment reduced significantly AHI at 3 months (24 vs 13.1/h) and further improved it at 6 months (13.1 vs 7.05/h). Compared with controls, OSA subjects had a significant higher baseline mean levels of fibrinogen, TAFIa, 6-keto-PGF1α, and glucose. MAS treatment significantly improved levels of IL-1ß, D-dimer, TAFIa, and CLT. Despite residual apneas, MAS treatment group presented similar measured homeostatic and inflammatory levels to controls except for glucose. CONCLUSION: Treatment with MAS in mild-to-moderate OSA subjects improves the inflammatory profile and homeostatic markers. CITATION: Nizankowska-Jedrzejczyk A; Almeida FR; Lowe AA; Kania A; Nastalek P; Mejza F; Foley JH; Nizankowska-Mogilnicka E; Undas A. Modulation of inflammatory and hemostatic markers in obstructive sleep apnea patients treated with mandibular advancement splints: a parallel, controlled trial.

[Effects of biomass combustion and occupational exposures on lung function in random population sample of Malopolska inhabitants]. / Wplyw spalania biomasy i narazen zawodowych na czynnosc pluc w losowej próbie populacyjnej mieszkanców Malopolski.

INTRODUCTION: Risk factors other than tobacco smoking contribute to about 20% of chronic obstructive pulmonary disease cases. Exposure to these risk factors and their influence on lung function has not been adequately studied in the population of Malopolska. MATERIAL AND METHODS: In random population sample of adults at least forty years old, residents of 2 districts of Malopolska, data on exposure to known and probable respiratory risk factors were collected using questionnaire. All subjects without contraindications performed pre- and post-bronchodilatator spirometry. RESULTS: We analyzed data from 618 subjects; 94,8% subjects lived for longer than 6 months in a dwelling where stove using coal or wood has been used for cooking and/or heating. At the time of study as many as 32.5% subjects were still using coal or wood for cooking or heating. Coal or wood were used as fuel on average for more than 30 years; 67% of subjects have ever worked in professions carrying a risk of exposure to potential respiratory risk factors. We have identified an independent relationship of farming with lower FEV1/FVC values as well as increased chronic obstructive pulmonary disease risk. CONCLUSIONS: Significant proportion of Malopolska inhabitants has been exposed to risks associated with cooking or heating with coal or wood. In the studied population farming was related to increased risk of chronic obstructive respiratory disease.

Specialty outpatient care of diabetic patients in Poland--are we far from treatment targets? Rationale, design, and preliminary results of the OPTIMO study.

INTRODUCTION: While clinical practice guidelines reflect the best known evidence-based approach to patient care, it is individual clinicians and patients who make decisions and treatment choices, and individual patients who actually achieve (or not) the treatment goals. OBJECTIVES: The aim of the study was to describe the population of diabetic patients attending specialty outpatient clinics, to characterize the management of patients with different types of diabetes, and to assess the accordance of management with the recommendations developed by Diabetes Poland. PATIENTS AND METHODS: The OPTIMO observational study was conducted from 2006 to 2009 and included patients with diabetes diagnosed according to the 1999 World Health Organization criteria who were observed for 1 to 3 years, with control visits at least every 6 months. Participating physicians used pocket PCs equipped with specially developed software to collect patients' data and to provide educational reminders to clinicians. RESULTS: The final analysis involved 9600 patients for whom valid baseline questionnaires were available. Type 2 diabetes was observed in 92% and type 1 diabetes in 6% of the patients. Mean age was 60.5 years. Women constituted 54% of the population. Coronary heart disease was observed in 32% and arterial hypertension in 76% of the patients. At baseline, 23% of the patients had hemoglobin A1c level below 6.5% and 44% below 7.0. Total cholesterol and triglycerides treatment goals were met at baseline by slightly more than half of the patients, while low-density lipoprotein cholesterol treatment goal was met only by 33% of the patients. Baseline blood pressure below 130/80 mmHg was reported for 11% of the patients. CONCLUSIONS: At the beginning of the OPTIMO study, we have observed considerable deviations from treatment targets recommended by current clinical practice guidelines for diabetic patients, which leaves significant room for improvement in the care of diabetic patients.

[Outpatients specialist care of chronic obstructive pulmonary disease patients in Poland - results of the KOMPAS study]. / Charakterystyka ambulatoryjnej opieki specjalistycznej nad choryni na przewlekla chorobe pluc w Polsce -- wyniki badania KOMPAS.

INTRODUCTION: COPD is one of the most important lung diseases. It is responsible for significant proportion of outpatients pulmonary clinics visits. Data on outpatients care of COPD patients in Poland are limited. This article presents design of the KOMPAS study and basic results relating to COPD patients. MATERIAL AND METHODS: The aim of this prospective study was to describe population of patients with COPD treated by specialists, and to characterize methods of care used in various COPD stages. Participating physicians used pocket PCs equipped with specially developed software to collect COPD patients' data. RESULTS: Data on 2958 COPD patients were analyzed. 2/3 of patients were males. Mean patients age was 63 years and mean FEV(1) - 57% of predicted value. 86% of all subjects underwent spirometry during the first visit or the previous 6 months. Cough and exertional dyspnoea were the most frequently reported COPD symptoms (about 80% of patients). At the first visit 32% of subjects were current smokers and 51% were ex-smokers. 17% of all study patients have never smoked. Before inclusion 2/3 of patients were treated with bronchodilatator, and about 1/3 with inhaled steroid. After entering the study, over 90% received bronchodilatator and more than 2/3 received inhaled steroid. Differences in treatment between stages of COPD based on its severity were relatively small. CONCLUSIONS: Results of the KOMPAS study provide basic information about COPD outpatients care in Poland. These data, especially concerning physicians' compliance with current COPD guidelines, may be useful in planning undergraduate/postgraduate training for physicians and for those who are responsible for health resource allocation.

Prevalence of COPD and tobacco smoking in Malopolska region--results from the BOLD study in Poland.

INTRODUCTION: There is a paucity of population-based data on chronic obstructive pulmonary disease (COPD) prevalence in Poland. To address this problem we participated in the Burden of Obstructive Lung Disease (BOLD) Initiative which was developed to provide standardized methods for estimating the prevalence of COPD and its risk factors. OBJECTIVES: The study aimed to assess the prevalence of COPD and some of its risk factors in adults aged 40 years and older in the Malopolska region in southern Poland. PATIENTS AND METHODS: Region--representative sample was drawn, basing on the current census data. Detailed BOLD questionnaires as well as pre- and post-bronchodilator spirometry were applied to eligible individuals. RESULTS: Six hundred and three subjects provided questionnaire and spirometry data; of those 526 provided spirometry data of appropriate quality and were included in the final analysis. Estimated population prevalence of COPD was 22.1%, whereas 10.9% had COPD in GOLD Stage > or = 2. COPD was far more common in men and its prevalence increased with age and exposure to tobacco smoke, and was inversely related to education level. The prevalence of current tobacco smoking was 28% (34% and 22% in men and women, respectively). Seventy-nine percent of men and 42% of women were ever-smokers. Twenty-nine percent of never smoking individuals were passively exposed to tobacco smoke in their households. CONCLUSIONS: Our results confirm the high prevalence of COPD in the studied region of Poland and emphasize the need to increase efforts to improve COPD awareness and limit tobacco smoking habit.