Multivariable regression analysis found associations between correct knowledge in the age group of 36 - 55 years old compared with the group of 18 - 35 years old (p<0.05; PR=0.82; 95% CI: 0.72 - 0.93), group >55 years old (p<0.05; PR=0.67; 95% CI; 0.52 - 0.86), hand hygiene (PR=1.85; 95% CI: 1.03 - 3.31; p<0.05), employment as a worker (PR=0.78; 95% CI: 0.62 - 1.00; p<0.01).