Table 1. Average onset adjusted incidence of MS in the populations of the western and eastern flanks of Mt. Etna during the incidence study period.

	Incidence of MS in the western flank
Years	Men	Cases	Cases/100000	Women	Cases	Cases/100000	Ave Total	Cases	Cases/100000	Cases/100000**
80–89	25115	/	/	25454	5	2.0	50569	5	1.0	0.8
90–99	25364	6	2.4	26851	16	6.0	52215	22	4.2	3.7
00–09	26333	7	2.7	28221	17	6.0	54554	24	4.4	3.9
Total	25724	13	1.7	26837	38	4.7	52561*	51	3.2	2.8

Legend:

* Average population 1981–2011;

** sex and age-adjusted to the Italian population (Census 2011).