Tab. II.

Percentages of correct answers to the healthcare associated infections section according to the year of course.

HAI Section	First year	Second year	Third year	p value
The environment is the major source of bacteria	20.2%	39.8%	45.8%	<0.0001
Advanced age or very young age increases the risk	70.4%	87.5%	85.4%	0.0044
Invasive procedures increase the risk	89.7%	96.6%	100%	0.0117
Nosocomial infection has a prevalence ranging between 5% to 10% in Italy	44.8%	47.7%	41.7%	0.7320
Nosocomial infections are responsible for approximately 5,000 deaths per year in Italy	50.7%	47.7%	27.1%	0.0130