Table 4.

ATC incidence in Sicily and USA.

Geographic area	N. residents (× 1000)	N. cases (2002–2009)	Incidence (ASRw)	p
Catania province	1,072	12	0.07	0.19
Rest of Sicily	3,941	31	0.05
Messina province	658	9	0.07	0.23
Rest of Sicily	4,355	34	0.05
Catania + Messina provinces	1,730	21	0.07	0.048
Rest of Sicily	3,283	22	0.04
All Sicily	5,013	43	0.05	0.08
USA	295,520	683	0.06