Table 3. Associations of farm-related factors with Coxiella burnetii seroreactivity among dairy cattle farmers in Korea.

Variables		Total	Seroreactivity, No. (%)	OR (95% CI)	P valuea
Farm owners or their families
	Yes	1,180	128 (10.8)	0.55 (0.22–1.35)	0.191
	No	33	6 (18.2)	Reference
Separation between stalls and milking parlors
	Yes	1,037	118 (11.4)	Reference
	No	158	16 (10.1)	0.88 (0.51–1.52)	0.642
Purchase of dairy cattle (within 1 year)
	Yes	232	24 (10.3)	0.90 (0.57–1.44)	0.672
	No	963	109 (11.3)	Reference
Farm beef or Korean native cattle
	Yes	471	35 (7.4)	0.52 (0.35–0.78)	0.002
	No	744	99 (13.3)	Reference
Farm dogs
	Yes	574	70 (12.2)	1.25 (0.87–1.79)	0.220
	No	641	64 (10.0)	Reference
Consumption of raw milk
	Yes	52	7 (13.5)	1.27 (0.56–2.88)	0.562
	No	1,167	127 (10.9)	Reference
Feeding
	Yes	1,053	114 (10.8)	0.94 (0.56–1.57)	0.812
	No	166	19 (11.4)	Reference
Milking
	Yes	1,090	119 (10.9)	0.94 (0.53–1.66)	0.831
	No	130	15 (11.5)	Reference
Cleaning cattle excretion
	Yes	1,022	107 (10.5)	0.74 (0.47–1.16)	0.193
	No	198	27 (13.6)	Reference
Compost production
	Yes	796	90 (11.3)	1.13 (0.77–1.65)	0.543
	No	423	43 (10.2)	Reference
Calf delivery
	Yes	1,054	114 (10.8)	0.89 (0.53–1.47)	0.637
	No	166	20 (12.0)	Reference
Artificial insemination
	Yes	338	38 (11.2)	1.04 (0.70–1.54)	0.858
	No	882	96 (10.9)	Reference