Table 1.

Age distribution (%) by area among the residents followed up in 2006 (n = 412).

Age group (years) in 1998	Nonpolluted (n = 91)	Moderately polluted (n = 131)	Highly polluted (n = 190)
35–44		24.2		49.6		45.8
45–54		30.8		26.7		34.7
55–64		28.6		19.8		13.7
≥ 65		16.5		3.8		5.8