Table 1.

Selected Demographic and Clinical Characteristics of 51 Untreated Patients with Erythema Migrans.

Characteristic	Findings
% male	64.7
Mean age ± SD in years (median, range)	49.8 ± 15.6 (50, 20-86)
% with multiple erythema migrans skin lesions	41.2
Mean area ± SD of largest erythema migrans skin lesion in square cm* (median, range)	179.8 ± 200.8 (99, 11-900)
Mean duration of erythema migrans ± SD in days at time of evaluation (median, range)	7.88 ± 5.51 (7, 1-22)
% with symptoms at study entry	76.5
Mean number of symptoms ± SD (median, range)	3.27 ± 3.38 (2, 0-12)
Mean body mass index ± SD (median, range)	25.2 ± 3.9 (25.1, 17.2-38.4)
% with reactive C6 Lyme serology**	64.7
Mean C6 ELISA value ± SD	4.3 ± 3.7
% with Babesia microti co-infection	7.8
% with Anaplasma phagocytophilum co-infection	0

^*Area defined as the maximum width times the maximum length

^**Test result was positive or equivocal