Table 1.

Demographic and travel-related characteristics of VFR travelers compared with non-VFR travelers at Global TravEpiNet from January of 2009 to December of 2011

	VFR	Non-VFR	P value*
Number	3,707	17,507
Age (years)
< 1	107 (2.9%)	7 (< 0.1%)	0.001
1–5	556 (15.0%)	83 (0.5%)	0.001
6–17	550 (14.8%)	784 (4.5%)	0.001
18–49	1,820 (49.1%)	11,080 (63.3%)	0.001
50–64	498 (13.4%)	3,822 (21.8%)	0.001
> 65	176 (4.8%)	1,731 (9.9%)	0.001
Sex (female)	2,002 (54.0%)	9,519 (54.3%)	0.86
Travel duration
1–7 days	108 (2.9%)	2,320 (13.3%)	< 0.0001
8–14 days	747 (20.1%)	7,150 (40.8%)	< 0.0001
15–28 days	1,165 (31.4%)	5,011 (28.6%)	< 0.0001
29–180 days	1,545 (41.7%)	2,488 (14.2%)	< 0.0001
> 6 months	136 (3.7%)	526 (3.0%)	< 0.0001
Type of destination
Urban only	1,542 (41.6%)	5,116 (29.2%)	< 0.0001
Rural only	136 (3.7%)	1,847 (10.6%)	< 0.0001
Both	2,015 (54.4%)	10,530 (60.2%)	< 0.0001
Neither	14 (0.4%)	14 (0.1%)	< 0.0001
Days to departure (median, IQR)	17 (8–33)	26 (12–46)	0.0001
Top five destination countries
	India (18.1%)	India (17.9%)
	Ghana (8.3%)	China (10.5%)
	Ethiopia (6.0%)	Thailand (9.3%)
	Nigeria (5.9%)	Kenya (8.4%)
	Vietnam (5.6%)	Tanzania (8.3%)

^*Based on Kruskal–Wallis equality-of-proportions test or Somers' D test as appropriate, adjusted for clustering among clinical sites.