Table 3. Multivariate analysis of OPXV IgM or IgG seropositivity among farmworkers and household members from 56 farms in Cundinamarca Department, Colombia, August–September 2016* .
| Variable |
OR (95% CI) |
p value |
|---|---|---|
| Individual-level risk factors | ||
| Age (dichotomous) | 3.38 (1.31–8.74) | 0.01 |
| Smallpox scar | 5.18 (1.71–15.66) | <0.01 |
| In-country travel | 0.11 (0.03–0.42) | <0.01 |
| Duration of time working at current farm | 2.34 (1.03–5.30) | 0.04 |
| Residence other than Medina | 0.26 (0.07–1.04) | 0.01 |
| Farm-level risk factors | ||
|---|---|---|
| Animals with vaccinia-like lesions | 5.71 (0.90–36.19) | 0.06 |
| Commercial feed | 0.16 (0.03–0.83) | 0.03 |
| Cattle fed after milking | 0.19 (0.03–1.15) | 0.07 |
*OPXV, orthopoxvirus; OR, odds ratio.