| Characteristic | No. of Subjects Testeda | Positive ELISA results | Odds Ratio | 95% Confidence Interval | P value | |
| No. | % | |||||
| Gender | ||||||
| Male | 137 | 97 | 70.8 | 1.3 | 0.82 - 2.19 | 0.21 |
| Female | 208 | 134 | 64.4 | 1.0 | ||
| Age (years) | ||||||
| 30 or less | 83 | 35 | 42.2 | 1.0 | ||
| 31 - 50 | 128 | 87 | 68.0 | 2.9 | 1.58 - 5.38 | 0.0002 |
| >50 | 134 | 109 | 81.3 | 6.0 | 3.09 - 11.63 | <0.0001 |
| Birth place | ||||||
| Durango State | 299 | 205 | 68.6 | 1.0 | ||
| Other State | 40 | 23 | 57.5 | 0.6 | 0.30 - 1.28 | 0.16 |
| Residence place | ||||||
| Durango State | 341 | 231 | 67.7 | 1.0 | ||
| Other State | 4 | 0 | 0.0 | 0.0 | 0.00 - 0.74 | 0.01 |
| Residence area | ||||||
| Urban | 311 | 212 | 68.2 | 1.0 | ||
| Suburban | 15 | 6 | 40.0 | 0.3 | 0.09 - 1.01 | 0.02 |
| Rural | 18 | 12 | 66.7 | 0.9 | 0.31 - 2.89 | 0.89 |
| Educational level | ||||||
| Up to 6 years | 45 | 36 | 80.0 | 2.4 | 1.03 - 5.69 | 0.02 |
| 7 - 12 | 116 | 81 | 69.8 | 1.4 | 0.82 - 2.34 | 0.2 |
| >12 | 182 | 114 | 62.6 | 1.0 | ||
| Occupation | ||||||
| Employedb | 247 | 176 | 71.3 | 2.1 | 1.24 - 3.52 | 0.002 |
| Unemployedc | 94 | 51 | 54.3 | 1.0 | ||
| Cats at home | ||||||
| Yes | 102 | 63 | 61.8 | 0.7 | 0.43 - 1.20 | 0.18 |
| No | 243 | 168 | 69.1 | 1.0 | ||
| Dogs at home | ||||||
| Yes | 244 | 157 | 64.3 | 0.7 | 0.38 - 1.13 | 0.1 |
| No | 101 | 74 | 73.3 | 1.0 | ||
| Raising farm animals | ||||||
| Yes | 131 | 71 | 54.2 | 0.4 | 0.24 - 0.64 | <0.0001 |
| No | 213 | 160 | 75.1 | 1.0 | ||
| Untreated water | ||||||
| Yes | 135 | 83 | 61.5 | 0.7 | 0.41 - 1.08 | 0.08 |
| No | 210 | 148 | 70.5 | 1.0 | ||
| Eating out of home | ||||||
| ≤10 times/yr | 151 | 111 | 73.5 | 1.7 | 1.06 - 2.82 | 0.02 |
| >10 times/yr | 193 | 119 | 61.7 | 1.0 | ||
| Smoking | ||||||
| Yes | 41 | 32 | 78 | 2.1 | 0.90 - 4.93 | 0.06 |
| No | 228 | 144 | 63.2 | 1.0 | ||