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Table 1 General characteristics of the population sample by gender.

From: Geographical information system and environmental epidemiology: a cross-sectional spatial analysis of the effects of traffic-related air pollution on population respiratory health

 

Males (n = 944)

Females (n = 1118)

p-value*

Age (years)

%

%

 

8-24

20.4

16.4

 

25-64

58.8

58.3

p = 0.010

65-97

20.8

25.3

 

Smoking habits

   

smokers

28.6

17.2

 

ex-smokers

40.6

16.8

p < 0.001

non-smokers

30.8

66.0

 

Passive smoking exposure

   

yes

58.3

48.3

p < 0.001

no

41.7

51.7

 

Educational level

   

low

42.8

59.6

 

medium

30.7

20.0

p < 0.001

high

26.5

20.4

 

Work position

   

manager/white collar

17.3

13.3

 

blue collar/farmer

19.9

8.3

p < 0.001

merchant/craftsman

14.6

8.2

 

unemployed

48.2

70.2

 

Occupational exposure

   

yes

58.1

28.7

p < 0.001

no

41.9

71.3

 

Number of hours at home

   

≥ 15 h

39.3

71.5

p < 0.001

< 15 h

60.7

28.5

 

Time of residence

   

< 5 years

11.8

10.4

p = 0.308

≥ 5 years

88.2

89.6

 

Type of self-reported environmental exposure

   

traffic

79.6

83.9

p = 0.076

other

20.4

16.1

 
  1. *p-values from Pearson chi-square test