Table 3.

Univariable analysis of predictors of GFR used to develop an eGFR formula. Univariable analysis was performed in 55 cats. Significant variables are highlighted in bold font

Variable	R 2	P value
Age	0.046	.115
Sex	0.059	.075
Breed	0.038	.154
Reciprocal of serum creatinine concentration	0.437	<.001
Serum urea concentration	0.258	<.001
Serum albumin concentration	0.004	.631
Serum total protein concentration	0.017	.339
Body weight	0.053	.090
Body condition score	0.002	.749
Predicted muscle mass	0.037	.196
Fat‐free mass	0.023	.318
Predicted fat‐free mass	0.041	.151
Left forelimb circumference	0.099	.019
Right forelimb circumference	0.010	.472
Left hindlimb circumference	0.006	.560
Right hindlimb circumference	0.010	.464
Left proximal hindlimb circumference	0.053	.090
Right proximal hindlimb circumference	0.074	.047
Thoracic circumference	0.018	.330
Pelvic circumference	0.054	.089
Body length	0.048	.107
Forelimb height	0.005	.605
Hindlimb height	0.000	.970