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. Author manuscript; available in PMC: 2015 Dec 21.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2015 Oct 13;24(12):1907–1909. doi: 10.1158/1055-9965.EPI-15-0787

Table 1.

Characteristics of the study population

Characteristic Control subjects (N=47,591) Case subjects (N=1,749)a

mean (SD) mean (SD)
Age at enrollment 55.1 (9.0) 56.9 (8.9)
n (%) n (%)
Race/Ethnicity
 Non-Hispanic White 40,750 83.5 1,528 86.4
 Non-Hispanic Black 4,318 8.9 113 6.4
 Hispanic 2,433 5.0 71 4.0
 Other 1,236 2.5 55 3.2
 Unknown 7 0.0 0 0.0
Education
 Less than high school 605 1.3 15 0.9
 Completed high school 6,882 14.2 245 13.9
 Associate or technical degree 16,473 33.9 545 30.8
 Bachelor’s degree 13,058 26.9 490 27.7
 Graduate degree 11,542 23.8 472 26.7
 Unknown 11 0.0 1 0.0
Body Mass Index
 <18.5 568 1.2 17 0.9
 18.5–24.9 18,171 37.4 639 36.1
 25.0–29.9 15,334 31.6 571 32.3
 30.0–39.9 12,101 24.9 450 25.5
 ≥ 40.0 2,375 4.9 91 5.2
 Unknown 17 0.0 0 0.0
Smoking
 Never smoker 26,183 53.9 920 52.0
 Former smoker 18,251 37.6 716 40.5
 Current smoker 4,070 8.4 131 7.4
 Unknown 67 0.1 1.0 0.1
Physical Activity (in Met-hours/week)
 1st Quintile 9,634 19.8 341 19.3
 2nd Quintile 9,627 19.8 360 20.4
 3rd Quintile 9,628 19.8 363 20.5
 4th Quintile 9,631 19.8 353 20.0
 5th Quintile 9,628 19.8 338 19.1
 Unknown 423 0.9 13 0.7
Hormone Replacement Therapy
 No, has never taken 43,396 89.4 1,523 86.1
 Yes, is taking or took in the past 4,962 10.2 238 13.5
 Unknown 213 0.4 7 0.4
a

. excluding in situ breast cancer cases

HHS Vulnerability Disclosure