Timothy Tilert

Learn More
PURPOSE To describe physical activity levels of children (6-11 yr), adolescents (12-19 yr), and adults (20+ yr), using objective data obtained with accelerometers from a representative sample of the U.S. population. METHODS These results were obtained from the 2003-2004 National Health and Nutritional Examination Survey (NHANES), a cross-sectional study(More)
BACKGROUND During 2007-2010, the National Health and Nutrition Examination Survey (NHANES) conducted a spirometry component which obtained pre-bronchodilator pulmonary lung function data on a nationally representative sample of US adults aged 6-79 years and post-bronchodilator pulmonary lung function data for the subset of adults with airflow limitation.(More)
During 2007-2012, about 46% of U.S. adults aged 40-79 with lung obstruction currently smoked cigarettes. This was more than double the smoking rate for those without lung obstruction (19.8%). In the United States, a greater percentage of men (20.5%) than women (15.3%) were current cigarette smokers in 2013. Some studies have suggested that women are more(More)
The National Health and Nutrition Examination Survey (NHANES), developed by the Centers for Disease Control and Prevention (CDC), is a large and comprehensive health survey utilizing leading edge technologies to produce national estimates of health measures and the nutritional status of the U.S. population. Early NHANES metadata models grouped data by(More)
PURPOSE To describe the frequency doubling technology (FDT) methodology to measure visual field loss in the National Health and Nutrition Examination Survey and to evaluate data reliability. METHODS Participants aged 40 years and older were eligible (n = 2,529) for 2 visual field tests per eye performed with the Humphrey Matrix N-30-5 screening test.(More)
INTRODUCTION Smoking cessation is the most effective therapeutic intervention for chronic obstructive pulmonary disease (COPD) patients. However, the proportion of smokers with COPD who have received physician advice to quit smoking is unknown. The purpose of this study is to assess the prevalence of receipt of smoking-cessation advice among adults with(More)
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. METHODS Spirometry data from two representative samples of the U.S. population, the National Health and Nutrition Examination Surveys (NHANES) conducted in 1988-1994 and 2007-2010, were used. The(More)
During 2007-2012, 14.7% of U.S. adults aged 40–79 had lung obstruction, with almost two-thirds having mild lung obstruction (9.4%) and one-third having moderate or worse obstruction (5.3%). A similar percentage of men and women had any lung obstruction, a pattern that persisted at each level of severity. There were notable differences in lung obstruction by(More)
BACKGROUND National Asthma Education and Prevention Program (NAEPP) guidelines recommend that periodic spirometry be performed in youth with asthma. NAEPP uses different spirometry criteria to define uncontrolled asthma for children (6-11 years) and adolescents (12+ years). OBJECTIVE To describe differences in spirometry between U.S. children and(More)
  • 1