Epidemiological Survey of Mycoplasma bovis in Yaks on the Qinghai Tibetan Plateau, China

Table 1

Prevalence and risk factors of M. bovis infection in yaks on the Qinghai Tibetan plateau.

Variable	Category	Number of samples	Positive samples	% (95% CI)	value	OR (95% CI)
Region	Qinghai	224	101	45.09 (38.45-51.86)	Reference
	Gansu	243	129	53.09 (46.60-59.50)	0.08	1.38 (0.96-1.98)
	Tibet	436	201	46.10 (41.35-50.91)	0.81	1.04 (0.75-1.44)
	Sichuan	56	36	64.29 (50.36-76.64)	0.01	2.19 (1.20-4.02)
Gender	Male	326	149	45.71 (40.21-51.28)	Reference
	Female	633	318	50.24 (46.27-54.20)	0.18	1.20 (0.92-1.57)
Age		158	88	55.70 (47.59-63.58)	0.04	1.52 (1.03-2.25)
		184	85	46.20 (38.83-53.68)	0.84	1.04 (0.72-1.51)
		283	128	45.23 (39.33-51.23)	Reference
		334	166	49.70 (44.21-55.19)	0.27	1.20 (0.87-1.64)
Total		959	467	48.70 (45.49-51.91)