Lden in dB(A) | <50 | 50–55 | 55–60 | ⩾60 | Total* | Total† |
---|---|---|---|---|---|---|
*Total in the study population. | ||||||
†Total in the overall population of study area. Source: Statistics Netherlands, 1 January 1998. | ||||||
Sex (n = 11601) | ||||||
Male | 50 | 53 | 54 | 53 | 52 | 49 |
Female | 50 | 47 | 46 | 47 | 48 | 51 |
Age (n = 11481) | ||||||
18–34 | 30 | 28 | 21 | 24 | 28 | 34 |
35–54 | 39 | 40 | 38 | 40 | 40 | 38 |
55–74 | 24 | 26 | 33 | 28 | 26 | 21 |
⩾75 | 7 | 6 | 8 | 8 | 6 | 8 |
Education level (n = 11220) | ||||||
None and lower | 17 | 19 | 21 | 21 | 18 | |
Intermediate | 46 | 46 | 50 | 48 | 47 | |
Higher | 37 | 35 | 29 | 31 | 35 | |
Country of origin (n = 11335) | ||||||
Netherlands | 95 | 94 | 94 | 96 | 95 | |
Other | 5 | 6 | 6 | 4 | 5 | |
Smoking behaviour (n = 11509) | ||||||
Never smoked | 37 | 37 | 39 | 40 | 37 | |
Ex-smoker | 34 | 34 | 35 | 33 | 34 | |
Smoker | 29 | 29 | 26 | 27 | 29 | |
Degree of urbanisation (n = 11812) | ||||||
Rural/slightly urban | 26 | 15 | 35 | 54 | 20 | |
Urban/strongly urban | 39 | 54 | 35 | 18 | 48 | |
Extremely urban | 35 | 31 | 30 | 28 | 32 |