Table 3.

Regression coefficients between dietary intake and biomarkers adjusted for sex and 5-y age band according to BMI category (kg/m2)

Obese participants, BMI >30
Lean participants, BMI <25
β ± SEPβ ± SEP
Dietary vitamin C versus plasma vitamin C0.332 ± 0.1720.0560.572 ± 0.152<0.001
Dietary vitamin C versus plasma vitamin C controlling for body weight0.334 ± 0.1730.0550.568 ± 0.153<0.001
Dietary fructose versus urine fructose0.073 ± 0.0350.0390.006 ± 0.2650.813
Dietary sucrose versus urine sucrose0.105 ± 0.7270.1470.232 ± 0.0690.001
Dietary sucrose fructose ratio versus urine sucrose fructose ratio0.040 ± 0.0250.1090.123 ± 0.027<0.001
Dietary protein versus urine urea0.020 ± 0.0110.0550.024 ± 0.0090.007