Table 4.

Results of the multivariate logistic regression analysis for the individual characteristics (P < 0·10, −2LL) in relation to non-dairy sheep farm residents C. burnetii seropositivity

Variable	Category	OR (95% CI)
Age (years)	12–19	2·81 (0·85–9·35)
	20–39	1·42 (0·57–3·54)
	40–49	2·29 (1·00–5·24)
	50–59	1·12 (0·50–2·48)
	>60	Reference
Amount of work at farm	Full working week	2·42 (1·13–5·15)
	Up to half a working week	1·23 (0·65–2·33)
	Never/occasionally	Reference
Contact with cattle at own or other farm*	Yes	3·87 (2·13–7·04)
	No	Reference
Worked in cattle sector in the past	Yes	1·79 (1·01–3·18)
	No	Reference

OR, Odds ratio; CI, confidence interval; −2LL, likelihood ratio test; AIC, Akaike's Information Criterion.

Number of observations used: 266 (AIC = 340·38).

^*See animals at <5 m or touch animals.