Factors associated with lung cytology as obtained by non-endoscopic broncho-alveolar lavage in group-housed calves

Table 6 Final multivariable logistic regression model for the association of clinical signs and broncho-alveolar lavage fluid characteristics with eosinophil and basophil percentage in broncho-alveolar lavage fluid of 352 group-housed calves

Cell type	Variable	Category	Calves (n =)	Percentage	OR	95% CI	P-value
Eosinophils ^a	Lung auscultation	Normal	159	3.8%	Referent
Eosinophils ^a	Lung auscultation	Abnormal	193	8.8%	2.8	1–8.1	0.05
Basophils ^b	H. somni culture	Negative	340	9.1%	Referent
	H. somni culture	Positive	12	50.0%	1.4	2.9–45.5	< 0.001
	BALf bloodstaining	Absent	313	9.3%	Referent
	BALf bloodstaining	Present	39	20.5%	3.2	1.2–8.3	0.02
	Lung consolidation > 3 cm in depth	Absent	245	7.3%	Referent
	Lung consolidation > 3 cm in depth	Present	107	17.8%	2.6	1.2–5.6	0.01

BALf broncho-alveolar lavage fluid. Random herd effect was significant for eosinophils (P = 0.03) and not significant for basophils (P = 0.20)
^a Cut-off > 1% eosinophils
^b Cut-off = ≥ 1 basophil counted on 400 cells
OR odds ratio, CI confidence interval

ISSN: 1746-6148