Seasonal influenza risk in hospital healthcare workers is more strongly associated with household than occupational exposures: results from a prospective cohort study in Berlin, Germany, 2006/07

Table 4 Logistic regression model for persons with serologically confirmed influenza infection as outcome (n = 727)

Exposure	Number exposed	Odds Ratio¹	P-value	95% confidence interval
Immunisation	257	0.50	0.02	0.29-0.88
Household contacts
Lives alone	75	ref	-	-
Lives with adults	430	2.0	0.28	0.58-6.70
1 or 2 children	198	5.3	0.02	1.33-21.12
3 or more children	33	13.8	0.001	2.97-64.27
Lives without children and has a car	352	3.0	0.02	1.21-7.25

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