. Author manuscript; available in PMC: 2011 Feb 28.

Published in final edited form as: Am J Kidney Dis. 2008 Nov 6;53(3):399–407. doi: 10.1053/j.ajkd.2008.07.036

Table 5. Variation in Serum Phosphorus Concentrations Explained by Groups of Potential Determinants.

Potential Determinants	Univariate R²	Cumulative R²
Fasting status, time of day	0.05
Age, sex, race/ethnicity	0.04	0.09
Dietary variables^*	0.01	0.11
Estimated glomerular filtration rate	0.007	0.11
Cardiovascular risk factors^†	0.01	0.12

Dietary variables include total energy, protein, carbohydrate, total fat, phosphorus, alcohol, dairy, meat, and seafood.

^†

Cardiovascular risk factors include diabetes, hypertension, hypercholesterolemia, smoking, body mass index category, C-reactive protein level greater than 0.21 mg/dL, and albuminuria.