Table 3

Regression analysis results

Urine calcium

Calcium balance

Analysis

B₁

p-value for slope

p-value for interaction

R²

B₁

p-value for slope

p-value for interaction

R²

Low calcium intakes (B₁)

-0.012

0.001

0.19

0.612

0.048

< 0.001

0.82

0.390

High calcium intakes

-0.012

0.048

Neutral or alkaline phosphate supplement (B₁)

-0.008

0.037

< 0.001

0.645

0.086

< 0.001

< 0.001

0.457

Acidic phosphate supplement

-0.070

< 0.001

0.008

0.78

B₁ = slope coefficient from regression model

R² = the proportion of variance explained by the regression analysis

Fenton et al. Nutrition Journal 2009 8:41   doi:10.1186/1475-2891-8-41