Table 3.

Multiple regression of IGF-I and IGFBP-3 on variables selected among race/ethnicity, age, parity, age at menarche, age at natural menopause, smoking, weight, height, BMI, physical activity, and dietary variables using Mallow's Cp selection and R2 selection

Females
Males
VariableRegression coefficientPR2VariableRegression coefficientPR2
IGF-I, ng/mLAge, y−0.01050.0002Age, y−0.0088<0.0001
Race/ethnicityAA0.12710.048Race/ethnicityAA0.01450.821
L−0.12370.050L−0.02670.673
J0.02410.700J0.06370.344
H0.04830.474H0.06230.320
BMI, kg/m2Q20.03520.553Height, in.0.02010.007
Q3−0.03210.583Fat from meat, g/1,000 kcal/d−0.01820.002
Q4−0.15710.009Smoking, current (vs never + past)−0.15970.004
0.080.08
IGFBP-3, ng/mLAge, y−0.0119<0.0001Age, y−0.0104<0.0001
Race/ethnicityAA−0.03290.515Race/ethnicityAA−0.15410.002
L−0.19160.0001L−0.07230.146
J0.08090.105J−0.01050.843
H0.04720.370H−0.01940.692
BMI, kg/m2Q20.15430.001Height, in.0.01230.035
Q30.09410.040Fat from meat, g/1,000 kcal/d−0.01430.002
Q4−0.00910.846Low-fat milk, g/1,000 kcal/d−0.06610.037
Alcohol0.05300.0003
0.180.12
IGFMRRace/ethnicityAA0.20570.0001Race/ethnicityAA0.13390.013
L0.11850.0229L0.03020.563
J−0.00390.940J0.03100.557
H0.03730.501H0.06910.1863
BMI, kg/m2Q2−0.09100.064Smoking, current (vs never + past)−0.13940.002
Q3−0.11770.015Alcohol−0.03910.009
Q4−0.14110.004
0.050.04
  • NOTE: Whites are reference group. Abbreviations for race/ethnicity: AA, African American; J, Japanese; H, Native Hawaiian; L, Latino; W, White.