Table 2. Characteristics of diarrheal cases compared with controls hospitalized for other conditions during a cholera outbreak in Hanoi, Vietnam, 2008 (vaccinated districts).
| Variable | Discordant pairs (case exposed) | Unadjusted matched odds ratio | p-value |
| Mean age (years)* † | 1.00 | 0.897 | |
| Mean monthly income (USD)* | 1.00 | 0.648 | |
| Male gender† | 3 (1) | 2.00 | 0.571 |
| Occupation requiring frequent travel‡ | 12 (9) | 3.00 | 0.099 |
| Ate dog meat§ | 13 (10) | 3.33 | 0.067 |
| Ate raw vegetables∥ | 18 (14) | 3.50 | 0.027 |
| Ate dog meat or raw vegetables¶ | 21 (17) | 4.25 | 0.009 |
| Ate shrimp paste** | 11 (6) | 1.200 | 0.763 |
| Do not drink boiled or bottled water most of the time†† | 12 (11) | 11.000 | 0.022 |
| Live in household without safe water/household tap‡‡ | 6 (2) | 0.500 | 0.423 |
*Modeled as continuous variable.
†: Matching factor.
‡: Examples of occupations requiring little or no travel include homemakers, seamstresses and office workers, while examples of occupations requiring frequent travel include laborers, car drivers and tour guides. Information available for 50 pairs, no missing information among discordant pairs.
§: Information available for 53 pairs, no missing information among discordant pairs.
∥: Information available for 53 pairs, no missing information among discordant pairs.
¶: Information available for 53 pairs, no missing information among discordant pairs.
**: Information available for 53 pairs, no missing information among discordant pairs.
††: Information available for 52 pairs, no missing information among discordant pairs.
‡‡: Information available for 52 pairs, no missing information among discordant pairs.