Mortality and morbidity among people living close to incinerators: a cohort study based on dispersion modeling for exposure assessment

Table 2 Characteristics of the cohort of residents in the area of Coriano (Italy) during the period 1990-2003 by estimated air concentration of healvy metals.

	Heavy metals air concentration
	I		II		III		IV
	<0.5 ng/m3		0.5 -1 ng/m3		1-2 ng/m3		>2 ng/m3		Total
	n	%	n	%	n	%	n	%	n	%
Total	10391	33.1	7961	25.4	9400	30.0	3595	11.5	31347	100.0
gender
male	4966	47.8	3775	47.4	4602	49.0	1811	50.4	15154	48.3
female	5425	52.2	4186	52.6	4798	51.0	1784	49.6	16193	51.7
age (years)
0 -44	5051	48.6	4178	52.5	4414	47.0	1720	47.8	15363	49.0
45 -59	2457	23.6	1808	22.7	2347	25.0	894	24.9	7506	23.9
60-74	1780	17.1	1266	15.9	1548	16.5	614	17.1	5208	16.6
75+	1103	10.6	709	8.9	1091	11.6	367	10.2	3270	10.4
Socioeconomic status
low	871	8.6	405	5.3	1294	14.7	656	20.6	3226	10.8
medium low	2289	22.5	659	8.6	3844	43.7	1088	34.1	7880	26.4
medium	2893	28.4	1633	21.3	2650	30.1	942	29.6	8118	27.2
medium high	3311	32.6	2515	32.8	932	10.6	500	15.7	7258	24.3
high	805	7.9	2447	31.9	74	0.8	0	0.0	3326	11.2
*missing*	222	2.1	302	3.8	606	6.4	409	11.4	1539	4.9
NO ₂ concentration
<30 μg/m ³	2624	25.3	1404	17.6	2851	30.3	956	26.6	7835	25.0
31-35 μg/m ³	2369	22.8	4188	52.6	3554	37.8	1478	41.1	11589	37.0
36-40 μg/m ³	2012	19.4	2012	25.3	1896	20.2	932	25.9	6852	21.9
>40 μg/m ³	3386	32.6	357	4.5	1099	11.7	215	6.0	5057	16.1
Change of exposure during follow-up
never	9744	93.8	7175	90.1	8737	92.9	3252	90.5	29185	93.1
one o more changes	647	6.2	786	9.9	663	7.1	343	9.5	2462	7.9
Person years	120568		90980		103015		40139		354702

ISSN: 1476-069X