Table 1. Anti-ganglioside IgG antibodies.

					Two-tailed p-value
	GBS	FM	N	HC	GBS vs FM	GBS vs N	GBS vs HC
Number	32	12	99	46
GM1	4 (13%)	1 (8%)	1 (1%)	0	NS	0.016	0.025
GM1b	0	0	1 (1%)	1 (2%)	NS	NS	NS
GD1a	0	0	0	0	NS	NS	NS
GalNAc-GD1a	0	0	0	0	NS	NS	NS
GD1b	1 (3%)	0	0	0	NS	NS	NS
GT1a	17 (53%)	0	2 (2%)	0	0.004	<0.001	<0.001
GQ1b	2 (6%)	0	0	0	NS	NS	NS
Any of the gangliosides above	20 (63%)	1 (8%)	4 (4%)	1 (2%)	<0.001	<0.001	<0.001

Abbreviations: GBS = Guillain-Barré syndrome subsequent to C. jejuni enteritis; FM = family members who had had C. jejuni enteritis; N = neighbors who had had C. jejuni enteritis; HC = healthy controls; NS = not significant (p > 0.05).