Table 1.
Frequency (n), percent (%), odds ratios (OR), 95% confidence intervals (CI) for odds ratios and P-values from the univariate analysis of the relationship between demographic determinants and acute gastrointestinal illness in randomly selected residents of two Canadian study areas, 2001 to 2003 (N = 8,108)
| Variable | n | % | OR | CI for OR | P-value |
| Number of People in Household | 0.005 a | ||||
| One | 2163 | 26.68 | 0.76 | (0.63, 0.91) | 0.004 |
| Two | 2644 | 32.61 | 0.80 | (0.68, 0.95) | 0.012 |
| Three or more b | 3220 | 39.71 | 1.00 | - | - |
| Missing | 81 | 1.00 | |||
| Urban/Rural Status | 0.080 a | ||||
| Urban b | 5957 | 73.47 | 1.00 | - | - |
| Rural | 1486 | 18.33 | 0.84 | (0.69, 1.02) | 0.080 |
| Missing | 751 | 9.31 | |||
| Education | 0.150 a | ||||
| No high school diploma b | 1323 | 16.32 | 1.00 | - | - |
| High school diploma | 3190 | 39.34 | 1.20 | (0.96, 1.51) | 0.124 |
| College/trade school diploma | 1271 | 15.66 | 1.30 | (1.00, 1.70) | 0.052 |
| University, graduate, or professional diploma | 1648 | 20.33 | 1.31 | (1.02, 1.69) | 0.035 |
| Missing | 601 | 8.35 | |||
| Culture | <0.001 a | ||||
| North American b | 6492 | 80.07 | 1.00 | - | - |
| European | 762 | 9.40 | 0.75 | (0.57, 0.98) | 0.038 |
| African | 67 | 0.83 | 0.26 | (0.04, 0.83) | 0.061 |
| Mediterranean | 88 | 1.09 | 0.62 | (0.24, 1.31) | 0.259 |
| Asian | 427 | 5.27 | 0.37 | (0.22, 0.58) | <0.001 |
| Native North American/Aboriginal | 91 | 1.12 | 1.54 | (0.83, 2.65) | 0.142 |
| South American | 31 | 0.38 | 0.91 | (0.22, 2.57) | 0.872 |
| Austral-Asian | 24 | 0.30 | 0.77 | (0.12, 2.62) | 0.723 |
| Missing | 126 | 1.55 | |||
| Income | 0.033 a | ||||
| <$20 000b | 951 | 11.73 | 1.00 | - | - |
| >$20 000 to <$40 000 | 1415 | 17.45 | 0.78 | (0.61, 1.02) | 0.074 |
| >$40 000 to <$60 000 | 1469 | 18.12 | 0.77 | (0.59, 1.00) | 0.047 |
| >$60 000 to <$80 000 | 987 | 12.17 | 1.07 | (0.82, 1.40) | 0.662 |
| >$80 000 | 1188 | 14.65 | 0.82 | (0.62, 1.07) | 0.138 |
| Missing | 2098 | 25.88 | |||
| Age (years) | <0.001 a | ||||
| 0–9 b | 562 | 6.93 | 1.64 | (1.29, 2.09) | <0.001 |
| 10–14 | 323 | 3.98 | 1.12 | (0.78, 1.57) | 0.527 |
| 15–19 | 319 | 3.93 | 0.90 | (0.61, 1.30) | 0.605 |
| 20–24 | 339 | 4.18 | 1.59 | (1.16, 2.14) | 0.003 |
| 25–64 | 4747 | 58.55 | 1.00 | - | - |
| 65–69 | 448 | 5.53 | 0.60 | (0.40, 0.87) | 0.009 |
| 70–74 | 387 | 4.77 | 0.32 | (0.18, 0.52) | <0.001 |
| 75–84 | 413 | 5.09 | 0.43 | (0.26, 0.66) | <0.001 |
| >84 | 98 | 1.21 | 0.36 | (0.11, 0.86) | 0.045 |
| Missing | 472 | 5.82 | |||
| Gender | 0.001 a | ||||
| Male b | 3254 | 40.13 | 1.00 | - | - |
| Female | 4828 | 59.55 | 1.28 | (1.11, 1.50) | 0.001 |
| Missing | 26 | 0.32 |
a Global P-value for Wald test of Ho: same level of risk in all categories
b reference group