Table 2.
Characteristic | n | % |
Race | ||
Caucasian | 1438 | 100.0 |
Age, yearsa | ||
<50 | 533 | 37.1 |
50 to 60 | 411 | 28.6 |
>60 | 494 | 34.3 |
Missing | 0 | 0.0 |
Education, yearsa | ||
less than a high school degree | 259 | 18.0 |
high school degree | 714 | 49.7 |
some college | 463 | 32.2 |
Missing | 2 | 0.1 |
Menopausal statusa | ||
Pre-menopausal | 377 | 26.2 |
Peri-menopausal | 35 | 2.4 |
Post-menopausal | 995 | 69.2 |
Missing | 31 | 2.2 |
Family history of breast cancera | ||
No | 715 | 49.7 |
Yes | 275 | 19.1 |
Missing | 448 | 31.2 |
Ever been pregnant (%)b | ||
No | 176 | 12.2 |
Yes | 1255 | 87.3 |
Missing | 7 | 0.5 |
Age at first birth (years, %)b | ||
Nulliparous | 176 | 12.2 |
20 | 347 | 24.1 |
20 to 24 | 539 | 37.5 |
≥25 | 339 | 23.6 |
Missing | 37 | 2.6 |
Age at menarche (years, %)b | ||
<12 | 268 | 18.6 |
12 to 13 | 763 | 53.1 |
>13 | 386 | 26.8 |
Missing | 21 | 1.5 |
Height, inchesa | ||
<62 | 411 | 28.6 |
62–64 | 419 | 29.1 |
>64 | 608 | 42.3 |
Missing | 0 | 0.0 |
Weight, poundsa | ||
<130 | 354 | 24.6 |
130–<145 | 318 | 22.1 |
145–<165 | 377 | 26.2 |
≥165 | 387 | 26.9 |
Missing | 2 | 0.1 |
BMI, kg/m2, a | ||
<24.9 | 744 | 51.7 |
25.0 – 29.9 | 433 | 30.1 |
≥30 | 259 | 18.0 |
Missing | 2 | 0.1 |
Smoking statusa | ||
Never | 839 | 58.3 |
Former | 366 | 25.5 |
Current | 232 | 16.1 |
Missing | 1 | 0.1 |
Current alcohol drinkera | ||
No | 814 | 56.6 |
Yes | 413 | 28.7 |
Missing | 211 | 14.7 |
a data from 1989 questionnaire
b data from 1996 questionnaire