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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2009 May;18(5):1365–1372. doi: 10.1158/1055-9965.EPI-08-1034

Table 2.

Summary of the baseline characteristics for the average and high risk controls and cases.

 Characteristic Healthy Controls
(n=444)
Benign Controls
(n=124)
Cases
(n=143)
Average Risk
(n=150)
High Risk
(n=294)
p-value* Average Risk
(n=110)
High Risk
(n=14)
p-value* Average Risk
(n=102)
High Risk
(n=14)
p-value*
 Age, median (range) 52 (30–75) 50 (31–83) 0.09 54 (27–83) 51 (25–71) 0.14 58 (35–86) 57 (19–80) 0.83
 BMI, median (range) 24.5 (18.5–42.0) 24.2 (16.2–43.9) 0.82 25.8 (18.8–51.6) 26.6 (17.8–50.6) 0.92 25.6 (19.2–42.9) 24.5 (20.6–53.7) 0.90
 RACE
   White 128 (85.3) 269 (91.5) 95 (86.4) 13 (92.9) 84 (82.4) 37 (90.3)
   Asian 3 (2.0) 3 (1.0) 4 (3.6) 0 5 (4.9) 1 (2.4)
   Black 0 0 1 (0.9) 0 0 1 (2.4)
   Other 0 6 (2.0) 3 (2.7) 0 4 (3.9) 0
   Unknown 19 (12.7) 16 (5.5) 0.01 7 (6.4) 1 (7.1) 0.90 9 (8.8) 2 (4.9) 0.26
 MENOPAUSE STATUS, n (%)
   Pre-menopause 53 (35.3) 96 (32.7) 17 (15.5) 3 (21.4) 13 (12.7) 2 (4.9)
   Post-menopause 97 (64.6) 198 (67.3) 0.57 93 (84.5) 11 (78.6) 0.57 89 (87.3) 39 (95.1) 0.17
 HRT Use (ever), n (%)
   No 32 (21.3) 178 (60.6) 48 (43.6) 6 (42.9) 42 (41.2) 14 (34.2)
   Yes 45 (30.0) 110 (37.4) 53 (48.2) 8 (57.1) 47 (46.1) 24 (58.5)
   Unknown 73 (48.7) 6 (2.0) <0.001 9 (8.2) 0 0.51 13 (12.7) 3 (7.3) 0.36
*

p-values were obtained by Wilcoxon rank-sum test for continuous variables and chi-square for catergorical variables.

Other race includes American/Alaskan Indians and women who reported more than one race.