. 2021 Mar 17;35(3):1427–1438. doi: 10.1111/jvim.16101

TABLE 5.

Comparison of serum urea nitrogen and creatinine concentrations, UCR, Hb, Hct, MCV, and MCHC between dogs with overt and occult GIB and clinically healthy dogs

	Overt GIB	Occult GIB	Healthy	P value
Urea nitrogen (mg/dL)	17.6 (4.2‐71) ^c	12.3 (5.6‐44.5) ^c,d	17.4 (9.2‐29.4) ^d	.03 ^a
Creatinine (mg/dL)	0.89 ± 0.31 ^c	0.82 ± 0.28 ^d	1.02 ± 0.24 ^c,d	.002 ^b
UCR	19.4 (8.1‐89.4) ^c,d	15.1 (7.2‐75.7) ^c	16.2 (8.0‐47.7) ^d	.008 ^a
Hb (g/L)	136.2 ± 46.2 ^c	122.05 ± 42.2 ^d	174.5 ± 17.09 ^c,d	<.0001 ^a
Hct (L/L)	0.43 (0.13‐0.60) ^c	0.38 (0.11‐0.53) ^d	0.51 (0.42‐0.65) ^c,d	<.0001 ^a
MCV (fL)	70 (54‐83)	71 (38‐89)	71 (64‐78)	.31 ^a
MCHC (g/L)	334 (253‐372) ^c	337 (277‐396)	340 (323‐366) ^c	.01 ^a

Note: Sixty‐five dogs had overt and 24 dogs had occult GIB; 65 dogs were clinically healthy. The non‐normally distributed data are expressed as median (range). Normally‐distributed data were expressed as mean ± standard deviation. For dogs with overt GIB, Hb, MCV, and MCHC results were available for 62 dogs, and Hct results were available for 63 dogs. For dogs with occult GIB, Hb and MCHC were available for 21, Hct and MCV for 22 dogs.

Abbreviations: GIB, gastrointestinal bleeding; Hb, hemoglobin; Hct, hematocrit; MCHC, mean corpuscular hemoglobin concentration; MCV, mean corpuscular volume; UCR, urea nitrogen/creatinine ratio.

^{^a}

Kruskal‐Wallis test.

^{^b}

ANOVA.

^{^c/d}

Post hoc test revealed significant difference between the groups marked with the same letter.