Table 2.

Partial Spearman correlation coefficients between C-peptide, IGFBP-1, HbA1c, BMI, alcohol, and physical activity among adenoma controls (n = 371) nested in Nurses' Health Study, 1989-1998

C-peptideIGFBP-1*HbA1cBMIAlcoholPhysical activity
C-peptide1.00
IGFBP-1*−0.551.00
HbA1c0.17−0.14§1.00
BMI0.44−0.450.091.00
Alcohol−0.13§−0.02−0.06−0.141.00
Physical activity−0.050.05−0.09−0.030.13§1.00
  • NOTE: Adjusted for age, assay batch, and time since last meal.

  • * Correlations with IGFBP-1 only among fasting controls (n = 234).

  • P < 0.001.

  • P < 0.01.

  • § P < 0.05.