Table 1 Weighted characteristics of sister study subsample with DNAm data (N = 4,479)
From: DNA methylation-predicted plasma protein levels and breast cancer risk
Characteristic | Overall N = 4,479 | Breast cancer-free N = 2,328 | Breast Cancer N = 2,151 |
|---|---|---|---|
Age, mean yrs. | 55.7 | 55.5 | 57.4 |
Physical activity, mean METs/week | 51.1 | 51.6 | 47.3 |
Smoking history, mean pack-years | 2.4 | 2.3 | 3.2 |
Alcohol use, mean drinks/week | 4.2 | 4.1 | 4.5 |
Parity, mean live births | 1.9 | 1.9 | 1.9 |
Body mass index, mean kg/m2 | 27.8 | 27.7 | 28.2 |
Self-reported Race | |||
Non-Hispanic White | 84% | 80% | 88% |
Black (Hispanic or non-Hispanic) | 16% | 20% | 12% |
Educational Attainment | |||
High school or less | 14% | 15% | 14% |
Some college | 33% | 34% | 32% |
College graduate or more | 52% | 51% | 54% |
Smoking status | |||
Never | 54% | 56% | 53% |
Former | 37% | 35% | 40% |
Current | 8% | 9% | 7% |
Menopausal status | |||
Premenopausal | 31% | 34% | 28% |
Postmenopausal | 69% | 66% | 72% |
Tumor invasiveness | |||
Invasive | 78% | ||
DCIS | 22% | ||
Invasive tumor ER status | |||
Positive | 69% | ||
Negative | 12% | ||
Missing | 19% |