Table 1.

Characteristics of Subjects With and Without COPD ( = 18,588)^a

Characteristic for subjects	Without COPD ( = 16,852)	With COPD ( = 1,736)
Age in years, mean	64.3	67.1*
Sex, No. (%)
Female	9,058 (53.8)	993 (57.2)
Male	7,794 (46.2)	743 (42.8)
Race/ethnicity, No. (%b)
White	14,382 (85.3)	1,530 (88.1)*
Black	1,641 (9.7)	143 (8.2)*
Other	829 (4.9)	63 (3.7)
Education, No. (%)
No HS diploma or equivalent	2,946 (17.5)	483 (27.8)
HS diplomat or equivalent	13,906 (82.5)	1,253 (72.2)
Marital status, No. (%b)
Married	11,431 (67.8)	955 (55.0)*
Separated	2,105 (12.5)	310 (17.9)*
Widowed	2,669 (15.8)	406 (23.4)*
Never been married	647 (3.8)	65 (3.8)
Body mass index (kg/meters), mean	27.5	27.9
Body mass index groups, No. (%b)
<19	360 (2.1)	89 (5.1)*
19–35	14,999 (89.0)	1,418 (81.7)*
>35	1,493 (8.9)	229 (13.2)*
Consumes alcohol, No. (%b)	9,309 (55.2)	765 (44.1)*
Respiratory symptoms, No. (%b)
Dyspnea	2,099 (12.5)	1,006 (58.0)*
Difficulty walking several blocks	3,994 (23.7)	989 (57.0)*
Chronic conditions, No. (%b)
Stroke	1,031 (6.1)	248 (14.3)*
Diabetes	2,694 (16.0)	375 (21.6)*
Coronary heart disease	3,425 (20.3)	711 (41.0)*
Arthritis	8,862 (52.6)	1,300 (74.9)*
Cancer	1,941 (11.5)	344 (19.8)*
Congestive heart failure	415 (2.5)	850 (10.0)*
Hypertension	8,255 (49.0)	1,052 (60.6)*
Current smoker, No. (%b)	2,538 (15.1)	505 (29.1)*

^aBoth counts and percentages are based upon weighted imputed values

^bNumbers do not sum to exactly 100% due to round-off error

*p-value < 0.05 for difference by COPD between mean (ordinary least squares regression) or prevalence rate (logistic regression) as appropriate