Table 2. Summary of risk factors associated with bovine tuberculosis (bTB) in traditional Afar cattle in November 2013 to April 2015 (n = 2550).

Risk factor	Levels	Number of cattle tested	bTB reactor animals (%)	OR (95% CI)	Χ2	p-value
Sex	Male	272	14 (5.1)	1.0	0.1	0.770
	Female	2278	127 (5.6)	1.1 (0.62–1.92)
Age	Juveniles	423	14 (3.3)	1.0	8.2	0.017*
	Reproductive	1776	99 (5.6)	1.7 (0.98–3.05)
	Aged	351	28 (8.0)	2.5 (1.31–4.89)
Lactation	Lactating	1095	54 (4.9)	1.0	1.67	0.197
	Non lactating	1183	73 (6.2)	1.3 (0.88–1.82)
Reproduction	Gravid	821	54 (6.2)	1.0	0.95	0.377
	Non gravid	1330	73 (5.2)	1.2 (0.83–1.72)
Body condition	Thin	414	42 (10.1)	1.0	17.6	< 0.001***
	Normal	2021	95 (4.7)	0.4 (0.30–0.64)
	Fat	115	4 (3.5)	0.3 (0.11–0.91)

OR = Odds Ratio, CI = 95% confidence intervals;

* P< 0.05;

** p < 0.01;

*** p < 0.001