Table 3—

Demographics of the 20,296 studied subjects and the proportion with comorbid diseases at baseline

Subjects#Comorbid disease %
0123
Age group yrs
 45–494096 (20.2)65.2±0.727.9±0.76.2±0.40.7±0.1
 50–543978 (19.6)57.4±0.831.9±0.79.5±0.51.3±0.2
 55–593751 (18.5)50.2±0.835.6±0.812.5±0.51.8±0.2
 60–643516 (17.3)41.6±0.839.6±0.815.9±0.62.8±0.3
 65–71437 (2.2)41.2±2.438.2±2.317.8±1.82.7±0.8
 72–751680 (8.3)39.6±1.242.1±1.214.6±0.93.8±0.5
 76–791168 (5.8)31.1±1.446.4±1.518.8±1.13.7±0.6
 ≥801670 (8.2)24.9±1.148.1±1.223.8±1.03.2±0.4
Sex
 Female11258 (55.5)49.9±0.535.9±0.512.6±0.31.6±0.1
 Male9038 (44.5)47.7±0.536.7±0.513.1±0.42.5±0.2
Race
 White16040 (79.0)52.7±0.433.9±0.411.5±0.31.9±0.1
 Black4256 (21.0)34.5±0.745.2±0.817.6±0.62.8±0.3
Smoking status
 Current8290 (40.9)53.7±0.734.0±0.711.0±0.41.4±0.2
 Former7052 (34.8)46.5±0.637.2±0.613.6±0.42.7±0.2
 Never4954 (24.4)48.1±0.536.9±0.513.2±0.41.9±0.1
Education yrs
 <124996 (24.6)35.8±0.741.9±0.719.0±0.63.2±0.2
 126372 (31.4)49.7±0.636.5±0.612.0±0.41.8±0.2
 >128928 (44.0)55.6±0.532.9±0.59.9±0.31.6±0.1
BMI
 <20811 (4.0)58.6±1.733.4±1.77.5±0.90.5±0.2
 20–246288 (31.0)60.4±0.630.5±0.68.2±0.31.0±0.1
 25–298100 (39.9)48.6±0.637.6±0.512.0±0.41.8±0.1
 ≥305097 (25.1)33.7±0.741.7±0.720.6±0.64.0±0.3
GOLD category
 3 or 4530 (2.6)35.1±2.144.7±2.217.5±1.72.6±0.7
 2+2076 (10.2)44.5±1.137.6±1.115.6±0.82.4±0.3
 1§2892 (14.3)47.3±0.937.7±0.913.6±0.61.4±0.2
 0ƒ4511 (22.2)45.5±0.736.1±0.715.3±0.53.2±0.3
 Restricted##2868 (14.1)40.8±0.938.4±0.917.7±0.73.2±0.3
 Normal7419 (36.6)57.0±0.634.0±0.68.0±0.31.0±0.1
Total2029648.9±0.435.3±0.312.8±0.22.0±0.1
  • Data are presented as n (%) or mean±sem. BMI: body mass index; GOLD: Global Initiative for Obstructive Lung Disease. #: subjects in the Atherosclerosis Risk in Communities Study during 1986–1989 and the Cardiovascular Health Study during 1989–1990; : forced expiratory volume in one second (FEV1)/forced vital capacity (FVC) <0.70 and FEV1 <50% predicted; +: FEV1/FVC <0.70 and FEV1 ≥50 to <80% pred; §: FEV1/FVC <0.70 and FEV1 ≥80% pred; ƒ: presence of respiratory symptoms in the absence of any lung function abnormality; ##: FEV1/FVC ≥0.70 and FVC <80% pred.