Table 1.

Demographics of ill US residents after return from international travel presenting to US GeoSentinel Network Clinics, 2000–12^a

Reason for travel
Characteristic	All Travellers	Business	MVRA	Student	Tourist	VFR
	n = 9624	n = 1394	n = 2379	n = 593	n = 3656	n = 1580
Gender (%)
Male	48.6	62.7	51.4	29.3	42.3	53.2
Female	51.5	37.4	48.6	70.7	57.7	46.8
Country of birth (%)
USA	77.9	78.6	91.5	91.4	86.2	32.3
Non-USA	22.1	21.5	8.5	8.6	13.8	67.7
Age (years)
Median	33	42	25	22	38	33
Range	0–94	4–88	1–92	12–61	0–94	0–91
Age-groups (%)
≤17 years	6.8	0.9	2.8	4.4	4.1	25.1
18–64 years	87.2	96.2	94.2	95.6	86.8	66.0
≥65 years	6.1	3.0	3.0	0	9.1	8.9
Travel duration (days)
Median	20	14	61	42	13	30
Interquartile range	10–60	8–35	16–421	22–101.5	8–22	16–61
Time from return to presentation (days)
Median	13	16	17.5	11	11	10
Interquartile range	4–42	4–58	5–49	3–37	4–38	4–30
Level of care (%)
Inpatient	7.4	3.3	2.7	4.7	5.2	24.4
Outpatient	92.6	96.7	97.3	95.3	94.8	75.6
Pre-travel medical advice (%)
Yes	45.4	45.7	73.4	62.9	35.4	19.5
No	42.0	43.7	17.1	21.4	53.1	60.0
Do not know	12.6	10.6	9.5	15.7	11.5	20.5
Region of exposure (%)
Central Americab	17.5	9.0	14.3	15.7	27.2	8.4
Caribbean	10.0	7.0	7.3	2.0	9.8	19.8
South America	13.5	10.0	20.4	15.4	11.9	8.8
South Central Asia	9.0	13.6	5.6	12.3	7.3	13.2
South East Asia	7.8	8.2	7.4	5.3	8.7	7.0
North East Asia	3.9	8.6	2.3	6.2	3.5	3.0
SubSaharan Africa	25.4	26.6	34.0	31.8	14.8	32.4
North Africa	2.0	3.0	2.0	1.5	2.0	1.6
Middle East	2.2	3.6	0.7	3.3	2.6	2.2
Oceania	1.0	0.8	1.8	0.6	1.1	0.3
Europe	6.7	9.1	3.6	5.9	9.8	3.4
Others	0.8	0.6	0.6	0.2	1.4	0.1

MVRA, missionary, volunteers, research, aid work; VFR, visiting friends and relatives.

^aMissing values: age (84), sex (33), country of birth (1), pre-travel (0; note: combined missing values with ‘Don’t Know’), Hospitalization (19) and Travel reason (22). Data for region of exposure were missing (480) or not ascertainable (473).

^bMexico was included.