Table 3 Risk factors for small airway disorders

Age group (years)

 18–29

30

1

 30–39

74

1.387(0.770–2.500)

0.276

 40–49

117

1.693(0.964–2.973)

0.067

 50–59

176

1.83(1.060–3.159)

0.03^*

 60–69

183

2.606(1.491–4.557)

0.001^**

 70–79

82

3.001(1.577–5.711)

0.001^**

 80 + 

18

7.772(2.284–26.443)

0.001^**

Gender

 Male

368

1

0.011^*

 Female

312

1.545(1.103–2.164)

Currently smoking

 No

380

1

0.002^**

 Yes

300

1.732(1.231–2.436)

History of dust exposure

 No

575

1

0.005^**

 Yes

105

1.723(1.177–2.521)

Pet Keeping

 never

548

1

  < 1 year

10

0.498(0.205–1.208)

0.123

  > 1 year

122

1.499(1.065–2.110)

0.02^*

Family history

 No

544

1

0.024^*

 Yes

136

1.481(1.052–2.084)

 O3(ug/m³)

1.008(1.003–1.013)

0.001^**

History of chronic bronchitis

 No

515

1

 < 0.001^***

 Yes

165

1.947(1.376–2.753)

History of emphysema

 No

578

1

0.001^**

 Yes

102

2.19(1.355–3.539)

History of asthma

 No

616

1

 < 0.001^***

 Yes

64

7.287(3.546–14.973)