Table 2.

Characteristics of participants by acoustic zone, Orio al Serio International Airport (BGY), Italy - June-September 2013

	Reference Zone <60 dBA		Zone A 60-65 dBA		Zone B 65-75 dBA		p*
	N/Mean	%/SD	N/Mean	%/SD	N/Mean	%/SD
Interviewed	166	100	164	100	70	100
Municipality
Azzano San Paolo	33	19.9	7	4.3	0	0.0	<0.001
Bagnatica	24	14.5	13	7.9	2	2.9
Bergamo	18	10.8	45	27.4	1	1.4
Brusaporto	12	7.2	0	0.0	0	0.0
Grassobbio	22	13.2	41	25.0	3	4.3
Orio al Serio	31	18.7	50	30.5	22	31.4
Seriate	26	15.7	8	4.9	42	60.0
Gender
Male	86	51.8	87	53.0	31	44.3	0.45
Female	80	48.2	77	47.0	39	55.7
Age (years)	56.8	7.2	58.8	7.2	56.0	7.7	0.01
BMI (kg/m2)	24.8	3.9	25.2	4.5	26.1	4.1	0.07
Education (years)
<6	24	14.5	37	22.6	18	25.7	0.40
6-9	55	33.1	53	32.3	25	35.7
10-13	61	36.7	48	29.3	16	22.9
14+	25	15.1	25	15.2	10	14.3
Missing	1	0.6	1	0.6	1	1.4
Cigarette smoking
Never	73	44.0	73	44.5	28	40.0	0.59
Former	54	32.5	56	34.2	20	28.6
Current	39	23.5	35	21.3	22	31.4
Last occupation
Director/entrepreneur	19	11.4	11	6.7	5	7.1	0.05
Self-employed	23	13.9	17	10.4	7	10.0
White collar	40	24.1	24	14.6	8	11.4
Blue collar	14	8.4	16	9.8	12	17.1
None/housewife	21	12.7	27	16.5	16	22.9
Retired	48	28.9	67	40.8	22	31.4
Other/Missing	1	0.6	2	1.2	0	0.0
Airport-related job	8	4.8	7	4.3	6	8.6	0.38
Years lived in the current house	22.1	14.7	25.4	15.7	28.0	15.7	0.01
Lived in the current house for at least 5 yrs House type	155	93.4	151	92.0	69	99.0	0.17
Villa	94	56.6	68	41.5	53	75.7	<0.001
Apartment	71	42.8	96	58.5	17	24.3
Missing	1	0.6
Performed structural interventions to reduce noise	41	24.7	53	32.3	29	41.4	0.07
Avoid staying outdoor	46	27.7	70	42.7	28	40.0	0.01

Abbreviations: BMI, body mass index; SD, standard deviation

*From chi-squared (categorical variables) or Kruskal-Wallis (quantitative variables) test