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The association between low-level crystalline silica (silica) exposure and mortality risk is not well understood. We investigated a cohort of 44,807 Chinese workers who had worked in metal mines or pottery factories for at least 1 year from January 1, 1960, to December 31, 1974, and were followed through 2003. Low-level silica exposure was defined as having a lifetime highest annual mean silica exposure at or under a permissible exposure limit (PEL).
View Article and Find Full Text PDFChange in prevalence of restrictive lung impairment in the U.S. population and associated risk factors: the National Health and Nutrition Examination Survey (NHANES) 1988-1994 and 2007-2010.
Multidiscip Respir Med
March 2015
Division of Respiratory Disease Studies, National Institute of Occupational Safety and Health/Centers for Disease Control and Prevention, 1095 Willowdale Road, Morgantown, WV 26505 USA.
Background: Data for the U.S adult population from the National Health and Nutrition Examination Survey (NHANES) were used to evaluate risk factors for a restrictive pattern on spirometry and estimate the change in its prevalence from the 1988-1994 to 2007-2010 sampling periods. Several previous epidemiologic studies used the Global Initiative for Chronic Obstructive Lung Disease fixed forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) > 0.
View Article and Find Full Text PDFChanges in prevalence of chronic obstructive pulmonary disease and asthma in the US population and associated risk factors.
Chron Respir Dis
February 2015
Division of Respiratory Disease Studies, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, USA.
Chronic lower airway diseases, including chronic obstructive pulmonary disease (COPD) and asthma, are currently the third leading cause of death in the United States. We aimed to evaluate changes in prevalence of and risk factors for COPD and asthma among the US adult population. We evaluated changes in prevalence of self-reported doctor-diagnosed COPD (i.
View Article and Find Full Text PDFPrevalence of chronic obstructive pulmonary disease among US working adults aged 40 to 70 years. National Health Interview Survey data 2004 to 2011.
J Occup Environ Med
October 2014
From the National Institute for Occupational Safety and Health (Drs Doney, Hnizdo, Syamlal, Kullman, and Burchfiel); West Virginia University (Dr Martin), Morgantown; and National Institutes of Health (Dr Mujuru), Bethesda, Md.
Objective: To estimate the prevalence and prevalence odds ratios of chronic obstructive pulmonary disease (COPD) among US workers by major occupational groups.
Methods: The 2004 to 2011 National Health Interview Survey data for working adults 40 to 70 years old was analyzed to estimate the prevalence of COPD by major occupational groups. Logistic regression models were used to evaluate the associations between COPD (chronic bronchitis or emphysema) and occupations.
Prevalence of Airflow Obstruction in U.S. Adults Aged 40-79 Years: NHANES Data 1988-1994 and 2007-2010.
COPD
August 2015
a Division of Repiratory Disease Studies, National Institute for Occupational Safety and Health , Centers for Disease Control and Prevention, Morgantown , WV , USA.
Background: The study evaluated the change in the prevalence of airflow obstruction in the U.S. population 40-79 years of age from years 1988-1994 to 2007-2010.
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