Table 1.

 ECG and echocardiographic characteristics in individuals without (<5 IU/ml), with elevated (>5 IU/ml), and with positive (>10 IU/ml) anti-Borrelia IgG antibodies

	Interval data	Seronegatives	Elevated anti-Borrelia IgG	Positive anti-Borrelia IgG	Nominal data	Seronegatives (reference)	Elevated anti-Borrelia IgG	Positive anti-Borrelia IgG
ECG		n = 3345	n = 345	n = 119		n = 3345	n = 345	n = 119
	P duration (ms)	113.9 (0.2)	114.3 (0.6)	114.2 (1.1)	AVB I°	1.0	1.19 (0.77 to 1.84)	1.13 (0.57 to 2.25)
	PQ duration (ms)	159.4 (0.4)	160.4 (1.2)	158.7 (2.1)	*LBBB	1.0
	QRS duration (ms)	99.8 (0.2)	99.0 (0.8)	100.2 (1.3)	LAFB	1.0	0.89 (0.46 to 1.64)	1.15 (0.48 to 2.76)
					LPFB	1.0	3.49 (0.20 to 60.1)	8.32 (0.51 to 137.2)
					RBBB	1.0	1.19 (0.60 to 2.36)	2.05 (0.88 to 4.76)
					*Incomplete RBBB	1.0	0.70 (0.16 to 3.0)
Echo		n = 1621	n = 186	n = 72		n = 2058	n = 272	n = 100
	LVM (g)	190.8 (1.3)	195.4 (3.8)	193.7 (6.0)	Moderate aortic valve sclerosis	1.0	1.22 (0.90 to 1.65)	1.54 (0.96 to 2.45)
	LVEDD (mm)	51.2 (0.13)	51.5 (0.39)	51.0 (0.62)	Severe aortic valve sclerosis	1.0	0.97 (0.58 to 1.63)	1.07 (0.48 to 2.42)
	FS	0.371 (0.002)	0.374 (0.007)	0.372 (0.012)		n = 2042	n = 272	n = 100
					Moderate mitral sclerosis	1.0	0.63 (0.30 to 1.35)	0.41 (0.10 to 1.71)
					Severe mitral sclerosis	1.0	1.14 (0.63 to 2.07)	1.04 (0.40 to 2.70)

*No subject with elevated or positive anti-Borrelia IgG had LBBB and no subject with positive anti-Borrelia IgG had incomplete RBBB.

All data are adjusted for sex and age; in both the general linear model (interval data) and logistic regression (nominal data) no differences attained significance. Data are given as adjusted mean (standard error) and as odds ratio (95% confidence interval) as indicated.