Table 2. Logistic and linear regression models results of knowledge, attitudes, and practices of avian influenza among 257 poultry workers, Italy*.

Variable	OR		95% CI		p value
Model 1: General knowledge about avian influenza; log likelihood –124.45, χ2 25.58, df 6, p = 0.0003
Years of working activity	1.03		1.01–1.06	0.015
Need of additional information	2.59		1.17–5.72	0.019
Perception of risk for avian influenza	1.13		1.01–1.26	0.037
Education level	1.63		1.02–2.61	0.042
Avian influenza is a serious and preventable disease	1.44		0.72–2.88	0.31
No. breeder animals exposed to per day	0.87		0.65–1.16	0.33
Model 2: Knowledge of all measures that protect poultry workers from exposure to avian influenza; log likelihood –142.95, χ2 44.40, df 7, p < 0.0001
Health professionals and employers as sources of information	3.62		1.99–6.59	<0.001
Perception of risk for avian influenza	1.19		1.07–1.34	0.002
Working with poultry and eggs	1.0†		–	–
Working with only poultry	2.11		1.17–3.81	0.013
Education level	1.37		0.90–2.08	0.14
General knowledge of avian influenza	1.44		0.74–2.8	0.28
No. breeder animals exposed to per day	0.88		0.68–1.14	0.33
Hours worked per day	1.05		0.95–1.14	0.35
Model 3: Modification of working habits in the past 3 mo; log likelihood –119.48, χ2 42.72, df 10, p < 0.0001
Health professionals and employers as sources of information		0.34	0.17–0.69	0.003
Marital status		0.31	0.13–0.76	0.01
Age		0.96	0.92–0.99	0.018
Avian influenza is a serious and preventable disease		2.29	1.09–4.76	0.028
General knowledge of avian influenza		2.11	1.03–4.31	0.041
Poultry workers are a risk group		2.30	0.94–5.65	0.07
Perception of risk for avian influenza		1.09	0.97–1.22	0.15
Working with poultry and eggs		1.0†	–	–
Working with only poultry		0.64	0.03–1.34	0.24
Sex		1.45	0.73–2.86	0.29
Education level		1.32	0.78–2.22	0.3
Model 4: Preventive measures behavior; log likelihood –119.36, χ2 45.26, df 4, p < 0.0001
Knowledge of preventive measures		5.95	3.06–11.56	<0.001
Working with poultry and eggs		1.0†	–	–
Working with only eggs		0.28	0.11–0.73	0.009
General knowledge of avian influenza		1.48	0.72–3.02	0.28
Health professionals and employers as sources of information		1.37	0.70–2.69	0.37
Variable		β coefficient	t			p value
Model 5: Perception of risk for avian influenza; F(7,249) = 8.25, p < 0.0001, R2 18.8%, adjusted R2 16.6%
Working with poultry and eggs		–†	–			–
Working with only poultry		–1.72	–5.0			<0.001
Hours worked per day		-0.19	-3.74			<0.001
Need additional information		1.16	3.56			<0.001
Media and television as sources of information		2.02	3.36			0.001
Knowledge of preventive measures		0.77	2.36			0.019
No. children		-0.21	-1.56			0.12
Sex		-0.32	-0.9			0.37
Constant		3.42

*OR, odds ratio; CI, confidence interval; df, degrees of freedom.
†Reference category.