Multivariate logistic regression analyses of symptoms reported by tick bite cases and erythema migrans (EM) cases.

EM  =  erythema migrans; mOR  =  multivariate odds ratio; CI  =  confidence interval; ns  =  not statistically significant.
*multivariate logistic regression model, matched by case.
†multivariate logistic regression model, adjusted for age.
‡significantly lower risk of an indistinct rash (other than EM) at follow-up than at baseline in the multivariate logistic regression model, matched by case (odds ratio 0.5, 95%CI: 0.3–0.9, p-value 0.03).