Table 5.

Comparison of the 10 subjects with erythema migrans who had an FSS-11 score of ≥ 4 with the other 41 subjects.

Characteristic	FSS-11 ≥ 4 n=10	FSS-11 < 4 n=41	P value
% male	50	68.3	0.30
Mean age ± SD in years	46.3 ± 17.6	50.6 ± 15.1	0.49
Mean ± SD body mass index	24.0 ± 13.5	25.5 ± 3.9	0.25
% with symptoms at study entry	100	70.7	0.09
Mean number of symptoms ± SD	7.5 ± 3.0	2.2 ± 1.26	< 0.001
% with multiple erythema migrans skin lesions	60	36.6	0.28
Mean duration ± SD of erythema migrans skin lesion in days	8.9 ± 7.1	7.6 ± 5.2	0.60
Mean area ± SD of largest skin lesion in square cm*	187.7 ± 256.9	177.9 ± 188.4	0.91
% with reactive C6 Lyme serology**	80	61	0.46
Mean ± SD C6 ELISA value	5.0 ± 3.5	4.1 ± 3.8	0.50
% with co-infection	10.0	7.3	1.0

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

^**Test result was positive or equivocal