Questionnaire Variables

Expected value CO (ppm)

Expected value PM_2.5 (µg/m³)

Expected value PM₁₀ (µg/m³)

no

yes

p

no

yes

p

no

yes

p

Motorized vehicles routinely park within 5 meters of home

0.954

(218)

0.919

(362)

0.803

7.21

(206)

7.48

(329)

0.030

45.6

(206)

46.1

(329)

0.038

Split system air conditioning units, not vented to outside

0.900

(504)

1.145

(72)

0.001

7.22

(464)

8.41

(67)

0.032

45.5

(464)

48.0

(67)

0.105

Central air conditioning unit

0.928

(461)

0.936

(115)

0.631

8.12

(423)

4.38

(108)

1.000

50.9

(423)

24.3

(108)

1.000

Kitchen attached to main living areas

0.879

(363)

1.056

(156)

0.005

8.11

(327)

6.24

(149)

1.000

51.4

(327)

38.4

(149)

1.000

Windows opened daily

0.969

(196)

0.914

(382)

0.884

7.38

(181)

7.43

(353)

0.189

46.6

(181)

45.8

(353)

0.353

Construction within 100 meters of home

0.907 (314)

0.965

(260)

0.188

7.51

(282)

7.28

(248)

0.659

45.8

(282)

46.0

(248)

0.451

Tobacco products smoked inside home

0.881

(353)

1.066

(117)

0.005

7.42

(322)

7.73

(110)

0.338

44.8

(322)

50.9

(110)

0.101

Incense used once or more per week

0.960

(36)

0.928

(483)

0.759

8.80

(34)

7.44

(442)

0.683

49.1

(34)

47.3

(442)

0.233

Portable electric heater used

0.929

(541)

0.972

(34)

0.457

7.39

(496)

6.76

(34)

0.550

45.3

(496)

49.2

(34)

0.058

Natural gas cooking equipment with kitchen attached to main living areas

0.894

(20)

1.081

(136)

0.117

7.70

(20)

6.05

(129)

0.669

40.6

(20)

38.2

(129)

0.292