Table 5 Multivariable analysis of the factors associated with COPD among study participants

Age groups

 < 50 years

0.052

0.010

0.277

0.001

 50 to 59 years

0.410

0.131

1.282

0.125

 60 to 69 years

0.473

0.179

1.252

0.132

 ≥ 70 Years

Ref

History of smoking tobacco

 Yes

Ref

 No

0.610

0.189

1.971

0.408

Biomass burning

 Charcoal

Ref

 Kerosene

18.835

0.799

444.224

0.069

 Firewood

0.990

0.225

4.366

0.990

 Oxygen saturation

0.876

0.742

1.035

0.120

 Years Smoked

1.065

1.013

1.119

0.014