Odds ratios and corresponding 95% confidence intervals for multivariable regression analysis of case and control subjects for various exposure measures (n = 931*)
| Variable | OR (95% CI) |
|---|---|
| Gender | |
| Female | 1.00 |
| Male | 2.70 (1.56–4.80) |
| Age group | |
| Children | 1.00 |
| Adults | 3.62 (1.66–8.84) |
| Reason for travel | |
| Tourism | 1.00 |
| Business | 1.12 (0.35–3.26) |
| Visiting friends and relatives | 2.82 (1.42–5.92) |
| Continent visited | |
| Other | 1.00 |
| Africa | 11.52 (6.33–22.05) |
| Obtained pretravel advice | |
| No | 1.00 |
| Yes | 0.38 (0.20–0.70) |
| Travel duration > 2 wk | |
| No | 1.00 |
| Yes | 1.40 (0.60–3.67) |
Note: CI = confidence interval, OR = odds ratio.
↵* After exclusions (see Figure 1).