Table 3.

Descriptive statistics of the relationship between risk factors and SICCT test and post-mortem examination results from Abattoir E

Covariate	SICCT test positive			Post-mortem positive
	Yes	No	% of positives	Yes	No	% of positives
Age at death
⩽2 years	3174	12 446	20.3	2048	13 572	13.1
>2 years	5777	36 438	13.7	3400	38 815	8.1
Days from last SICCT test to slaughter
⩽45 days	8944	14 573	38.0	5312	18 205	22.6
>45 days	7	34 311	0.02	136	34 182	0.40
Breed
Dairy	4063	17 736	18.6	2205	19 594	10.1
Non-dairy	4888	31 148	13.6	3243	32 793	9.0
Sex
Bull	331	903	26.8	109	1125	8.8
Bullock	1506	18 934	7.4	1029	19 411	5.0
Female	7114	29 047	19.7	4310	31 851	11.9
Last SICCT test reason
Routine	1219	14 300	7.9	747	14 772	4.8
Restricted	4601	20 323	18.5	2669	22 255	10.7
Risk	3131	14 261	18.0	2032	15 360	11.7