ANTHROPOMETRIC MEASURES AND METABOLIC-RATE IN ASSOCIATION WITH RISK OF BREAST-CANCER (UNITED-STATES)

To investigate whether cancer risk-reduction seen in calorie-restricte d animals also applies to breast cancer in women, we have analyzed dat a from the first National Health and Nutrition Examination Survey in t he United States and subsequent follow-up surveys. During the follow-u p of one to 155 months, 182 out of 7,622 women developed breast cancer . Due to biased under-reporting of dietary intake, the analysis did no t examine calorie intake as an exposure variable, but rather focused o n anthropometric measures and metabolic rate as biomarkers of nutritio nal balance, Multiple Cox regression analysis showed elevated odds rat ios (OR) for height, elbow width, and skinfolds among postmenopausal w omen. ORs for the fifth quintile were 2.0 (95 percent confidence inter val [CI]=1.0-3.8), 2.3 (CI=1.2-4.7), and 2.0 (CI=1.0-4.0), respectivel y. Weight (OR=2.5, CI=1.2-5.1) and resting metabolic rate (OR=2.0, CI= 1.0-4.0) were significant relative to the second quintile, Bitrochante ric breadth, sitting height, body fat, body mass index, or combination variables were not associated with cancer risk, It was concluded that in the analysis of breast cancer data, skeletal measures ought to be considered as routine potential confounders, and that using measured r ather than estimated metabolic rates may improve risk prediction.