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Table 2 Descriptive summary of questions found (as shown with a check mark) in the questionnaires delivered during home visits, recoded for analysis in the pooled investigation of hopanes in dust and land use determinants of traffic pollution

From: A new exposure metric for traffic-related air pollution? An analysis of determinants of hopanes in settled indoor house dust

Question type

CHILD

TCHEQ

WOEAS

Emissions sources within 100 m of the home

√

×

×

Factory

2%

Gas station

11.3%

Parking

15.6%

  

Construction site

23.5%

  

Shoe removal

√

  

Yes

94%

×

×

No

6%

  

Type of floor

√

√

√

mixed

4%

83%

4%

smooth

21%

17%

36%

carpets

75%

 

60%

Cleaning frequency

√

√

√

Rarely

14%

4%

56%

Moderately

80%

71%

44%

Frequently

6%

25%

Window usage/type

√

√

√

Usually open/sheer

15%

37.5%

33.3%

Covered with blinds/curtains

42.5%

14.8%

63%

Sealed

34%

14.8%

3.7%

Opened daytime/ closed night Other

2%

14.8%

0%

Garages

√

√

√

Yes

46%

17%

52%

No

54%

83%

48%

Type of house

√

√

√

single

64%

100%

100%

multifamily

36%

Air conditioning

√

√

√

Yes

40%

100%

81%

No

60%

11%

Frequency of AC use

√

√

√

Frequently

21%

42%

15%

Sometimes

19.5%

46%

7%

Don’t know

59.5%

12%

 

Never

0

 

78%