Table 5.

Logistic regression model of reported post-travel illness for individual trips

Variable	Estimate	95% CI		Pr > |Z|	Pr > ChiSq*
VFR trip home
Intercept	−3.8	−4.9	−2.7	< 0.0001
Age-group (years)
26–50	0.63	0.041	1.2	0.036
65+	0.36	0.48	1.2	0.40
51–65	REF				0.092
Gender
Male	0.013	−0.37	0.39	0.95
Female	REF				0.95
Region of travel
Africa	1.17	0.29	2.1	0.010
Asia	0.95	0.056	1.8	0.037
Latin American and the Caribbean	REF				0.78
Travel companions
Other adults	0.30	−0.82	1.41	0.60
Children	0.13	−0.29	0.54	0.56
None	REF				< 0.0001
Purpose of travel
Tourism	0.86	0.38	1.3	0.000
Visit only	1.1	6.0	1.6	< 0.0001
Work/study	REF				0.024
Sought pretravel care
Yes	0.345	−0.047	0.73	0.084
No	REF				0.084
All trips
Intercept	−4.03	−4.93	−3.12	< 0.0001
VFR trip home
No	1.08	−0.27	2.43	0.12
Yes	REF				0.11
Age-group (years)
26–50	0.73	0.23	1.2	0.004
65+	0.55	−0.16	1.3	0.13
51–65	REF				0.016
Gender
Female	0.006	−0.32	0.33	0.97
Male	REF				0.97
Purpose of travel
Tourism	1.1	0.36	1.8	0.004
Work/study	0.86	0.12	1.6	0.023
Visit only	REF				0.49
Travel companions
Other adults	0.83	0.43	1.2	< 0.0001
Children	1.125	0.71	1.5	< 0.0001
None	REF				< 0.0001
Sought pretravel care
Yes	0.31	0.065	0.55	0.01
No	REF				0.013
Purpose of trip home
Other trips tourism*	−1.3	−2.63	0.11	0.072
Other trips visit only*	−0.78	−2.21	0.65	0.28
Other trips work/study*	REF
VFR trip home tourism*	REF
VFR trip home visit only*	REF
VFR trip home work/study*	REF				0.054

VFR = visiting friend and relative.

^*Pr > ChiSq represents overall association for a given variable.