Table 3.

Least-squares means ± standard errors for urine parameters measured in cats consuming urinary or non-urinary products.

Urine parameters	Urinary food (n = 130)	Non-urinary food (n = 127)	p-value
Calcium oxalate RSS	3.33 ± 0.32	3.71 ± 0.37	0.071
Calcium oxalate crystals, count1	1	11	0.003
Struvite RSS	1.04 ± 0.17	4.48 ± 0.42	<0.001
Struvite crystals, count	8	47	<0.001
pH	6.15 ± 0.05	6.72 ± 0.05	<0.001
Ammonium, mM	190 ± 7.0	220 ± 7.0	0.002
Sodium, mM	220 ± 6.0	110 ± 6.0	<0.001
Potassium, mM	106 ± 5.0	200 ± 6.0	<0.001
Chloride, mM	250 ± 11.0	150 ± 6.0	<0.001
Calcium, mM	1.1 ± 0.1	1.2 ± 0.1	0.093
Phosphorus, mM	50.0 ± 2.0	80.0 ± 2.0	<0.001
Magnesium, mM	3.2 ± 0.2	4.5 ± 0.2	<0.001
Oxalate, mM	0.8 ± 0.04	1.2 ± 0.04	<0.001
Citrate, mM	1.2 ± 0.4	4.3 ± 0.4	<0.001
Sulfate, mM	80 ± 3.5	90 ± 0.4	0.016

¹Actual count of the number of samples in which crystals were observed under microscopic observation.

RSS, relative supersaturation.