Table 1.

Descriptive characteristics of breast cancer cases by vital status, Western New York Exposures and Breast Cancer (WEB) study

Dead as of December 2006Alive as of December 2006
(n = 160)(n = 864)
Mean (SD)
Age, y59.71 (12.33)57.79 (10.97)
Education, y12.80 (2.50)13.60 (2.60)a
Body mass index, kg/m229.66 (6.96)28.44 (6.35)b
Age at menarche, y12.61 (1.66)12.56 (1.60)
Age at first birth, y22.78 (4.82)23.98 (4.87)c
Age at menopause, y47.53 (6.03)48.48 (5.34)
Number of births2.59 (1.80)2.31 (1.69)
Number (%)
Race
 Caucasian139 (86.88)799 (92.48)b
 Other21 (13.13)65 (7.52)
Menopausal status
 Premenopausal45 (28.13)240 (27.78)
 Postmenopausal115 (71.88)624 (72.22)
Family history of breast cancer
 No117 (81.25)629 (79.22)
 Yes27 (18.75)165 (20.78)
Estrogen receptor status
 Negative69 (43.13)212 (24.54)a
 Positive81 (50.63)602 (69.68)
 Unknown/not done10 (6.25)50 (5.79)
Progesterone receptor status
 Negative78 (48.75)277 (32.06)a
 Positive71 (44.38)526 (60.88)
 Unknown/not done11 (6.88)61 (7.06)
HER2
 Negative87 (54.38)540 (62.50)
 Positive14 (8.75)48 (5.56)
 Unknown/not done59 (36.88)276 (31.94)
Stage at diagnosis
 I46 (28.75)440 (50.93)a
 IIA25 (15.63)187 (21.64)
 IIB30 (18.75)74 (8.56)
 IIIA3 (1.88)11 (1.27)
 IIIB6 (3.75)5 (0.58)
 IV21 (13.13)15 (1.74)
 Stage not available29 (18.13)132 (15.28)
Underlying cause of death
 Breast cancer95 (59.38)
 Other cancer11 (6.88)
 Cardiovascular diseases22 (13.75)
 Others32 (20.00)