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Trends in the Prevalence of Obstructive and Restrictive Lung Function Among Adults in the United States

2013; Elsevier BV; Volume: 143; Issue: 5 Linguagem: Inglês

10.1378/chest.12-1135

1931-3543

Earl S. Ford, David M. Mannino, Anne G. Wheaton, Wayne H. Giles, Letitia Presley-Cantrell, Janet B. Croft,

Asthma and respiratory diseases

Background National spirometric surveillance data in the United States were last collected during 1988-1994. The objective of this study was to provide current estimates for obstructive and restrictive impairment of lung function and to examine changes since 1988-1994. Methods We used data from 14,360 participants aged 20 to 79 years from the National Health and Nutrition Examination Survey (NHANES) III (1988-1994) and 9,024 participants from NHANES 2007-2010. Spirometry was conducted using the same spirometers and generally similar protocols. Results During 2007-2010, 13.5% (SE, 0.6) of participants had evidence of airway obstruction (FEV 1 /FVC < 0.70): 79.9% of adults had normal lung function, 6.5% had a restrictive impairment, 7.5% had mild obstruction, 5.4% had moderate obstruction, and 0.7% had severe obstruction. Although the overall age-adjusted prevalence of any obstruction did not change significantly from 1988-1994 (14.6%) to 2007-2010 (13.5%) ( P = .178), significant decreases were noted for participants aged 60 to 79 years and for Mexican Americans. The prevalence of current smoking remained high among participants with moderate (48.4%) and severe (37.9%) obstructive impairments. A significant decline in current smoking occurred only among those with normal lung function ( P < .05). Conclusion Spirometry revealed little change in the prevalence of any obstructive and restrictive impairment in lung function during 2007-2010, compared with 1988-1994.