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).