Table 3.

Random Effects Parameters from Linear Mixed Effects Models with Random Intercepts Only Stratified by Glomerular and Non-Glomerular CKD Diagnoses.

	Among children with glomerular CKD
Parameter	Null	Proteinuria only	FGF23 only	Proteinuria and FGF23
S.D. (level) [σ₁]	0.417	0.374	0.343	0.328
S.D. (slope) [σ₂]	0	0	0	0
Correlation [ $\frac{σ_{12}}{σ_{1} σ_{2}}$ ]	NA	NA	NA	NA
S.D. residual [σ]	0.192	0.180	0.188	0.179
AIC	221.760	132.725	145.526	90.566
	Among children with non-glomerular CKD
	Null	Proteinuria only	FGF23 only	Proteinuria and FGF23
S.D. (level) [σ₁]	0.412	0.342	0.361	0.308
S.D. (slope) [σ₂]	0	0	0	0
Correlation [ $\frac{σ 12}{σ_{1} σ_{2}}$ ]	NA	NA	NA	NA
S.D. residual [σ]	0.150	0.146	0.150	0.146
AIC	−589.712	−854.061	−710.660	−936.368

Abbreviations: S.D., standard deviation; AIC, Akaike’s information criterion.