Table 1.
Women | Average potential exposure during July 2002 (number of articles) | |||||
---|---|---|---|---|---|---|
<1.00 | 1.00–1.99 | 2.00–2.99 | 3.00+ | |||
N | (Column %) | Row % | ||||
Total observations | 327,144 | 54.8 | 17.4 | 15.0 | 12.8 | |
Use of hormone therapy at baselinea: | ||||||
No | 71,270 | 56.2 | 56.3 | 16.7 | 15.0 | 12.0 |
Yes | 55,523 | 43.8 | 54.0 | 18.8 | 14.7 | 12.5 |
Age (years) | ||||||
50–54 | 103,941 | 31.8 | 52.7 | 18.2 | 15.6 | 13.5 |
55–59 | 77,893 | 23.8 | 54.0 | 17.7 | 14.9 | 13.5 |
60–64 | 57,352 | 17.5 | 56.5 | 16.7 | 14.5 | 12.3 |
65–69 | 47,365 | 14.5 | 57.6 | 16.5 | 14.3 | 11.5 |
70–74 | 40,593 | 12.4 | 56.1 | 17.0 | 15.0 | 11.9 |
Race/ethnicity | ||||||
White, non Hispanic | 243,558 | 77.6 | 56.1 | 18.7 | 136 | 11.6 |
Black, non Hispanic | 20,378 | 6.5 | 63.0 | 12.7 | 14.5 | 9.8 |
Asian/Hawaiian/Pacific Islander | 16,845 | 5.4 | 11.4 | 4.8 | 36.7 | 47.1 |
Other/Mixed (2+ races) | 6,407 | 2.0 | 60.8 | 13.2 | 12.0 | 14.0 |
Hispanic | 26,797 | 8.5 | 69.1 | 10.1 | 13.7 | 7.0 |
1st degree family history of breast cancer* | ||||||
No | 264,097 | 86.0 | 55.3 | 17.3 | 15.0 | 12.5 |
Yes | 43,097 | 14.0 | 54.0 | 18.5 | 13.3 | 14.1 |
Education* | ||||||
<High school graduate | 27,232 | 10.4 | 64.0 | 10.7 | 14.7 | 10.6 |
High school graduate | 72,295 | 27.6 | 63.9 | 16.7 | 11.5 | 7.9 |
Some college or technical school | 71,491 | 27.3 | 50.4 | 18.6 | 15.9 | 15.1 |
College graduate or postgraduate | 90,721 | 34.7 | 42.5 | 16.4 | 17.7 | 23.4 |
Site* | ||||||
North Carolina | 65.7 | 15.9 | 14.6 | 3.8 | ||
New Hampshire | 44.8 | 40.2 | 12.3 | 2.6 | ||
Vermont | 95.5 | 4.3 | 0.2 | 0.0 | ||
San Francisco | 3.3 | 1.9 | 39.1 | 55.6 | ||
Western Washington | 30.1 | 12.5 | 11.3 | 46.1 | ||
New Mexico | 88.3 | 8.6 | 3.1 | 0.0 | ||
Denver | 7.8 | 58.2 | 33.2 | 0.8 |
Characteristics of the women at the time of the first observation. Data were missing for: education (n = 13,159), family history (19,950), and education (65,405).
aBaseline period refers to July–December 2001.
*p < .001 for chi-square comparing level of average potential exposure across subgroups of women in each category.