Table 3. Risk factors associated with positive reaction to SCITT.

Risk factor	Category	Positive/total	Positive (%)	Univariate analysis		Multivariate analysis
				OR	95% CI	OR	95% CI	p
Age	≤4 yrs	62/283	22	reference		reference
	>4 yrs	388/854	45	2.9	2.0–4.1	3.2	2.2–4.7	<0.001
Gender	Female	259/773	38	reference		reference
	Male	155/362	43	1.1	0.8–1.4	1.2	0.9–1.6	0.300
Breed	Landim × Brahman	265/534	50	reference		reference
	Landim	167/468	36	0.7	0.5–0.9	0.6	0.4–0.8	0.002
	Bonsmara a	0/88	0	nd		nd
Body condition score	Good	250/705	35	reference		reference
	Reasonable	153/337	45	1.0	0.8–1.4	1.0	0.7–1.4	0.820
	Poor and Very poor	44/88	50	1.4	0.8–2.3	1.3	0.7–2.1	0.410

^aExcluded from the multivariate model to avoid quasi separation.