TABLE 1.

Selected clinicopathological variables of cats with single measurement ionized hypercalcemia and normocalcemic cats at diagnosis of azotemic chronic kidney disease.

Variables	Normocalcemic (n = 131)	n	Hypercalcemic (n = 33)	n	P
	Median [25th, 75th percentile]		Median [25th, 75th percentile]
Ionized calcium (mmol/L)	1.31 [1.28, 1.34]	131	1.41 [1.39, 1.50]	33
Age (years)	15.2 [13.0, 16.9]	128	15.2 [11.8, 17.1]	31	.95
Albumin (g/dL)	3.1 [2.9, 3.3]	131	3.1 [3.0, 3.3]	33	.65
ALP (U/L)	30 [23, 39]	131	31 [23, 37]	33	.38
BCS (1‐9)	4 [3, 5]	131	4 [3, 4]	33	.27
Calcidiol (pmol/L)	137 [109, 177]	34	134	1
Calcitriol (pmol/L)	424 [341, 456]	34	146	1
Chloride (mEq/L)	118 [116, 120]	129	118 [117, 122]	29	.15
Creatinine (mg/dL)	2.39 [2.13, 2.70]	131	2.38 [2.20, 2.74]	33	.91
FGF23 (pg/mL)	443 [265, 1015]	123	1608 [643, 2527]	29	.001
Globulin (g/dL)	4.6 [4.3, 5.1]	131	4.4 [4.1, 5.3]	33	.35
HCO3 − (mEq/L)	20 [19, 22]	131	20 [18, 21]	33	.23
MMS (0‐2)	1 [1, 1]	127	1 [1, 1]	32	1
PCV (%)	35 [31, 38]	131	32 [30, 35]	33	.24
Venous pH	7.35 [7.32, 7.38]	131	7.34 [7.30, 7.37]	33	.68
Phosphate (mg/dL)	3.87 [3.50, 4.80]	131	4.12 [3.78, 4.86]	33	.38
Potassium (mEq/L)	4.0 [3.7, 4.3]	129	4.2 [3.9, 4.6]	29	.022
PTH (pg/mL)	19.6 [10.7, 37.5]	118	10.4 [2.6, 36.6]	27	.053
SBP (mmHg)	135 [124, 146]	131	137 [126, 151]	32	.53
Sex (n [%] male)	55 (42)	131	21 (64)	33	.042
Sodium (mEq/L)	153 [151, 155]	129	153 [150, 156]	29	.49
Total calcium (mg/dL)	10.0 [9.6, 10.3]	131	10.7 [10.3, 11.4]	33	<.001
Total protein (g/dL)	7.8 [7.4, 8.1]	131	7.6 [7.1, 8.3]	33	.31
USG	1.017 [1.015, 1.020]	81	1.018 [1.016, 1.020]	21	.25
Weight (kg)	3.70 [3.15, 4.45]	127	3.81 [3.18, 4.28]	31	.98

Abbreviations: ALP, alkaline phosphatase; BCS, body condition score; FGF23, fibroblast growth factor 23; MMS, muscle mass score; PTH, parathyroid hormone; SBP, systolic blood pressure; USG, urine specific gravity.