Table 2: Distribution at baseline of selected characteristics by quintiles of DXA-derived whole body fat mass among non-cases ( 10,457).

Quintiles of whole body fat mass
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21132098209520862065
Age, mean63.563.764.063.361.8
Family history of breast cancer (%)15.915.716.615.215.6
History of diabetes (%)2.83.66.510.016.4
Age at menarche (% <12 yrs)15.319.320.123.226.3
Age at first full-term pregnancy (% ≥30 yrs)8.77.66.76.67.7
Parity (mean)2.42.52.72.82.8
Age at menopause, mean47.346.346.446.145.4
Oral contraceptive use (% ever)38.137.335.936.738.3
Hormone therapy (% ever)58.757.753.050.544.5
Alcohol intake—drink/wk (mean)2.32.01.81.41.0
Physical activity (MET), mean15.711.210.27.76.2
Pack-years of smoking, mean8.79.48.98.49.5
Total energy intake (Kcal/day), mean15281585163217091848
Total carbohydrate intake (g/day), mean198199201207217
Education (% post-college)29.122.519.519.317.6
Ethnicity, %
 Non-Hispanic white86.681.477.673.967.9
 Black7.610.613.515.822.6
 Hispanic3.76.67.27.96.7
 Other2.11.41.72.42.8