Table 1.

Demographics of 1,356 pre-travel participants tested for IgG antibodies against hepatitis E virus by the Boston Area Travel Medicine Network from November 2008 to September 2010, stratified by level of previous exposure to countries highly endemic for Hepatitis E

Total	Group 1: born in a highly endemic country		Group 2: not born in a highly endemic country but lived in one for ≥ 1 year		Group 3: never lived in a highly endemic country but traveled to at least one		Group 4: never lived in or traveled to a highly endemic country		Overall
	152		51		710>		443		1,356>
Attribute	N	%	N	%	N	%	N	%	N	%
Country of birth
United States	N/A	N/A	42	82	576	81	340	77	958	71
Other	152	100	9	18	117	16	98	22	376	28
Missing	0	0	0	0	17	2	5	1	22	2
Sex
Female	71	47	23	45	381	54	261	59	736	54
Male	80	53	28	55	327	46	180	41	615	45
Missing	1	< 1	0	0	2	< 1	2	< 1	5	< 1
Race
White	6	4	42	82	566	80	299	67	913	67
Non-white	140	92	7	14	116	16	128	29	391	29
Missing	6	4	2	4	28	4	16	4	52	4
Age
< 20	3	2	1	2	17	2	14	3	35	3
20–40	48	32	15	29	209	29	232	52	504	37
> 40	38	25	15	29	227	32	103	23	383	28
Missing	63	41	20	39	257	36	94	21	434	32

N/A = not applicable