Table 1.
Baseline Characteristics of Study Participants and Univariate Logistic Regression Analysis of Risk Factors for the Acquisition of Traveler’s Diarrhea in US and Canadian Visitors to Mexico
| Characteristic | All subjects | Healthy subjects | Subjects with traveler’s diarrhea | RR (95% CI) | P |
| No. (%) of subjects | 1360 (100) | 744 (54.7) | 616 (45.3) | … | |
| Male sex | 391 (28.8) | 199 (26.7) | 192 (31.2) | 1.12 (0.99–1.27) | .08 |
| Race | |||||
| White | 1222 (89.9) | 663 (89.1) | 559 (90.7) | Reference | |
| Black | 76 (5.6) | 45 (6.1) | 31 (5.0) | 1.12 (0.87–1.51) | .41a |
| Asian | 36 (2.6) | 23 (3.1) | 13 (2.1) | … | NS |
| Native American | 4 (.3) | 3 (.4) | 1 (.2) | … | NS |
| Pacific Islander | 4 (.3) | 2 (.3) | 2 (.3) | … | NS |
| Other | 18 (1.3) | 8 (1.1) | 10 (1.6) | … | NS |
| Ethnicity | |||||
| Non-Hispanic | 1197 (88.0) | 649 (87.2) | 548 (89.0) | 1.11(0.92–1.36) | .31 |
| Age, mean years ± SD | 30 ± 13 | 31 ± 14 | 28 ± 12 | … | <.001 |
| Length of stay, mean days ± SD | 25 ± 11 | 23 ± 10 | 26 ± 11 | … | <.001 |
| Season of travel | |||||
| Summer | 1080 (79.4) | 563 (52.1) | 517 (47.9) | 1.37 (1.16–1.64) | <.001 |
| All other seasons | 278 (20.4) | 181 (65.1) | 97 (34.9) | … |
NOTE. NS, not significant; RR, relative risk; SD, standard deviation.
a
By 2 × 2 χ2 test for the comparison with White versus Black.