Table 2

Breast cancer incidence according to quintiles of dietary glycemic load and index in post-menopausal women, CPS II Nutrition Survey, 1992–1997

Quintiles of energy-adjusted glycemic loadQuintiles of energy-adjusted glycemic index
1 (lowest)2345 (highest)P for trend1 (lowest)2345 (highest)P for trend
No. cases304287305292254314300278269281
Total person-years of follow-up55871574895541453719547725900059221498775419854968
Age-adjusted RRa1.000.921.011.000.860.2671.000.961.060.951.000.947
95% CI0.78–1.080.87–1.190.86–1.180.73–1.020.82–1.120.90–1.240.81–1.120.86–1.19
Multivariate-adjusted RRb1.000.941.051.050.900.6791.000.971.060.981.030.706
95% CI0.80–1.110.89–1.240.88–1.240.76–1.080.82–1.130.90–1.250.83–1.150.87–1.22
  • a Adjusted for age at interview.

  • b Adjusted for age at interview, age at menarche, age at menopause, number of live births, age at first live birth, hormone replacement therapy, oral contraceptive use, family history of breast cancer in a mother or sister, personal history of breast cysts, education, BMI, adult weight gain from age 18, location of body weight gain, height, physical activity, energy, diethylstilbestrol use, alcohol use, race, and smoking status.