Table 2.

Univariate risk factor analysis for IgM positivity

	IgM positives N = 38 (%)	IgM negatives N = 703	P
Mean age (sd)	54 (3.3)	37.2 (0.7)	< 0.001
Gender
Male	29 (76.3)	341 (48.5)	0.001
Female	9 (23.7)	362 (51.5)
Agricultural activity	15 (39.5)	171 (24.3)	0.036
Husbandry	13 (34)	163 (23.2)	0.120
History of tick bite	6 (15.8)	41 (5.8)	0.014