Table 3.

Population Characteristics at Baseline.

	Follow-up (2009-2014), 840 pts
Gender (%)
Female	40.96
Male	59.04
Smoking habit (%)
Yes (current and former)	51.08
No	48.92
Residence address (%)
Pavese	69.05
Lomellina	13.33
Oltrepo	17.62