Table 4.

Full results of three linear regression models for spirometric outcomes in the 2009–2010 National Health and Nutrition Examination Survey cohort (n = 2,956)

Variable	Change in % Predicted FEV1	P Value	Change in % Predicted FVC	P Value	Change in % FEV1/FVC	P Value
One additional joint-year	0.02 ± 0.02	0.4	0.07 ± 0.02	0.004	−0.03 ± 0.01	0.02
One additional tobacco pack-year	−0.13 ± 0.02	<0.0001	−0.04 ± 0.03	0.2	−0.1 ± 0.01	<0.0001
Increasing age, yr	−0.09 ± 0.002	0.001	−0.11 ± 0.02	<0.0001	−0.2 ± 0.02	<0.0001
White race	1.12 ± 0.66	0.1	1.8 ± 0.7	0.02	−1.7 ± 0.3	<0.0001
Female	1.80 ± 0.4	0.001	2.69 ± 0.53	0.0001	1.5 ± 0.3	0.0002
History of asthma	−5.3 ± 1.11	0.0002	−2.19 ± 1.06	0.06	−3.0 ± 0.3	<0.0001
History of chronic bronchitis	−3.2 ± 1.65	0.07	−3.25 ± 1.56	0.05	−0.3 ± 0.6	0.6
History of emphysema	−8.67 ± 6.91	0.2	−1.86 ± 5.13	0.7	−6.5 ± 2.9	0.04