Haematological and biochemical reference intervals for free-ranging brown bears (Ursus arctos) in Sweden

BMC Veterinary Research

Table 2 Haematological reference intervals for brown bears ( Ursus arctos ) in Sweden presented as 95% confidence interval ¹

Variable^a	Unit	n	λ^b	2.5 - 97.5 interval^c	Sex^d	Age group^e	Reference interval	p-value^f
Haemoglobin	g/L	69	1.8	142-189	B	Y	137-171	<0.0001^A
Haemoglobin	g/L	69	1.8	142-189	B	SA	154-188	<0.0001^A
RBC	×10¹²/L	69	0	6.2-8.0	B	YSA	6.2-8.0
Haematocrit	L/L	69	0.6	0.41-0.54	B	Y	0.40-0.49	<0.0001^A
Haematocrit	L/L	69	0.6	0.41-0.54	B	SA	0.43-0.54	<0.0001^A
MCV	fL	69	2	57-75	B	Y	57-70	<0.0001^A
MCV	fL	69	2	57-75	B	SA	63-75	<0.0001^A
MCHC	g/L	69	0	334-373	F	YSA	332-366	0.0062^AxS
					M	Y	332-366
					M	SA	350-374
WBC	×10⁹/L	69	−0.2	3.6-11.4	B	YSA	3.9-11.5
Segmented neutrophils	%	69	2	57.8-92.5	B	Y	62.2-93.6	0.0185^A
Segmented neutrophils	%	69	2	57.8-92.5	B	SA	58.4-85.9	0.0185^A
Eosinophils	%	69	0	0.0-9.6	B	Y	0.0-4.3	<0.0001^A
Eosinophils	%	69	0	0.0-9.6	B	SA	0.0-11.1	<0.0001^A
Lymphocytes	%	69	0.4	2.5-32.5	B	YS	4.8-32.6	0.001^A
Lymphocytes	%	69	0.4	2.5-32.5	B	A	1.0-27.7	0.001^A
Monocytes	%	69	0.2	0.8-11.3	B	YSA	0.7-11.7
Platelet count	×10⁹/L	48	0.4	103-811	B	YSA	141-520

¹: Presented stratified by age group, sex or presented overall, depending on if a difference between groups was detected. ^a: RBC=red blood cell count; MCV=mean corpuscular volume; MCHC=mean corpuscular haemoglobin concentration; WBC=white blood cell count. ^b: λ=the transformation value from the Box-Cox transformation. ^c: 2.5 and 97.5 percentiles on untransformed data. ^d: B=both female and male; F=female; M=male. ^e: Y=yearling; S=subadult; A=adult. ^f: p-values are given for significantly different groups: ^A=p-value for age and ^AxS=p-value for age-sex interaction.

ISSN: 1746-6148