Table 5. Multivariate logistic regression analysis of participant-based characteristics associated with Coxiella burnetii positivity among dairy cattle farm residents, the Netherlands, September 2010–March 2011*.

Association with positivity, characteristic	OR (95% CI)
Positive association
Age, y
<35	Reference
35–44	1.4 (0.8–2.3)
45–54	1.0 (0.6–1.6)
>55	1.9 (1.0–3.5)
Work on farm
No	Reference
Part time (1–39 h/wk)	2.4 (1.1–5.2)
Full time (>40 h/wk)	10.4 (4.2–25.7)
Contact with pigs at own or other farm
Yes	2.6 (1.2–5.4)
No	Reference
Contact with cows at other farm
Yes	1.6 (1.0–2.6)
No	Reference
Indirect contact with rats/mice at own farm
Yes	1.5 (1.0–2.4)
No	Reference
Negative association
Use of gloves during cattle birth care
Fully compliant	0.4 (0.2–0.8)
Partly or noncompliant	Reference
No birth care	0.7 (0.4–1.1)
Contact with poultry at own farm
Yes	0.6 (0.4–0.9)
No	Reference
Contact with compost
Yes	0.6 (0.3–0.9)
No	Reference

*The analysis included the primary participant-based characteristics associated with positivity (p<0.10 in likelihood ratio test). The number of observations was 712. Model fit was assessed by use of the Hosmer–Lemeshow goodness-of-fit test (p = 0.91). OR, odds ratio.