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. 2014 Feb 10;9(2):e87403. doi: 10.1371/journal.pone.0087403

Table 1. Demographic Characteristics by Age and Smoking Status (N = 4,655).

50–59 years (N = 1,188) 60–69 years (N = 1,471) 70–79 years (N = 1,075) 80+ years (N = 921)
Never Smokers Current Smokers Never Smokers Current Smokers Never Smokers Current Smokers Never Smokers Current Smokers
Subjects (%) 61.9 38.1 65.5 34.5 79.3 20.7 92.1 7.9
Years Smoking, mean -- 38.3 (5.0) -- 46.4 (6.3) -- 54.6 (8.2) -- 63.0 (8.8)
Age Started Smoking -- 16.4 (4.4) -- 17.8 (5.5) -- 19.4 (7.8) -- 19.7 (7.8)
Heavy Smoking (%) -- 74.6 -- 66.6 -- 55.5 -- 41.8
Female (%) 71.1 41.3 68.0 51.4 77.8 49.5 78.7 55.2
White (%) 81.9 81.6 82.3 81.7 87.4 87.0 88.7 88.5
Black (%) 9.3 13.4 9.1 12.1 9.3 9.2 8.3 5.8
Hispanic (%) 8.8 5.0 8.6 6.2 3.3 3.8 2.9 5.7
Education, mean 12.4 (3.4) 11.5 (3.1) 11.5 (398) 10.8 (3.3) 10.7 (3.7) 10.4 (3.5) 10.0 (3.8) 10.1 (4.1)
BMI a , means 28.5 (5.8) 26.4 (5.1) 27.9 (5.4) 25.8 (5.4) 27.2 (5.8) 24.7 (4.9) 25.2 (4.6) 22.9 (3.8)
Died (%) 4.3 13.6 12.8 36.5 33.9 53.1 72.8 77.0
a

BMI: Body Mass Index. All values are run using sample weights