Table 1.

Descriptive statistics for continuous variables age, body weight, serum creatinine concentration, serum urea concentration, urinary specific gravity (USG), urinary protein-to-creatinine ratio (UPC), size of the left kidney, size of the right kidney, difference in size between left and right kidney (in absolute values) for Ragdoll cats (group 1) and control cats (group 2). The number of cats in each group for which the parameter was available is also expressed in the table (N)

Parameter	Group	N	Mean ± SD	Median	Range
Age (years)	1	133	2.7 ± 1.8	2.1	0.9–8.8
	2	62	2.7 ± 1.6	2.4	0.8–8.2
Body weight (kg)	1	133	4.2 ± 0.9	4.1	2.8–7.5
	2	62	4.1 ± 0.8	4.2	2.5–6.2
Creatinine (µmol/l)	1	133	145.5 ± 29.1	141	80–266
	2	62	139.6 ± 33.1	137.5	80–227
Urea (mmol/l)*	1	133	7.6 ± 1.5	7.4	4.8–15.8
	2	62	8.0 ± 1.3	7.9	5.0–13.3
USG*	1	129	1.056 ± 0.009	1.055	1.019–1.080
	2	62	1.049 ± 0.013	1.052	1.012–1.075
UPC	1	129	0.21 ± 0.14	0.15	0.04–0.68
	2	62	0.18 ± 0.1	0.17	0.05–0.52
Size of left kidney (cm)	1	133	3.8 ± 0.5	3.7	2.8–5.7
	2	62	3.7 ± 0.3	3.7	3.0–4.5
Size of right kidney (cm)	1	133	3.9 ± 0.5	3.9	2.7–5.0
	2	62	3.8 ± 0.4	3.8	3.0–4.5
Size difference (cm)	1	133	0.21 ± 0.22	0.15	0.00–1.28
	2	62	0.22 ± 0.18	0.17	0.00–0.76

Reference interval for serum creatinine concentration: 71–212 µmol/l. Reference interval for serum urea concentration: 5.7–12.9 mmol/l

^*Significant difference between group 1 and group 2 (P <0.05)