Table 2.

Correlation matrix for serologic iron indices and dietary iron in controls only from the PLCO Cancer Screening Trial (n = 396)

Serologic indicesDietary data
Serum variableIronTransferrin saturationTIBCUIBCCRPTotal ironaHeme irona
Ferritin0.140.20−0.15−0.240.06−0.070.25
P0.005<0.00010.002<0.00010.230.16<0.0001
Iron0.870.29−0.33−0.25−0.020.04
P<0.0001<0.0001<0.0001<0.00010.760.47
Transferrin saturation−0.17−0.72−0.27−0.030.07
P0.0009<0.0001<0.00010.520.15
TIBC0.76−0.030.05−0.04
P<0.00010.550.310.38
UIBC0.140.08−0.08
P0.0040.130.13
  • aNutrient density energy adjusted.