Table 2.

Multilevel linear regression model

Variable	Regression coefficient β [95% CI]	P value
TEMP study
Age (years)	1.002 [.994–1.010]	.684
Gender (male)	1.028 [.878–1.204]	.738
BMI (kg · m−2)	.987 [.970–1.004]	.141
Creatinine level (µmol · L−1)	.997 [.992–1.003]	.369
Baseline calcium mass	1.006 [1.005–1.006]	< .001
Delta calcium mass	1.002 [1.002–1.003]	< .001
VITACAL study
Age (years)	1.002 [.994–1.010]	.443
Gender (male)	1.009 [.857–1.188]	.917
BMI (kg · m−2)	1.011 [.999–1.023]	.093
Creatinine level (µmol · L−1)	.999 [.996–1.001]	.309
Baseline calcium mass	1.014 [1.013–1.014]	< .001
Delta calcium mass	1.006 [1.005–1.007]	< .001

Results of the multilevel linear regression model with TBR at baseline as dependent variable