Table 3 Comparison of the prevalence of asthma-like symptoms and asthma and outcome of logistic regression analysis in Zunyi in winter vs. summer

Constant

−13.655

1.785

0.000

<0.001***

0.000

<0.001***

Age, years

0.029

0.014

1.030 (1.003,1.058)

0.030*

1.032 (1.006,1.05)

0.016*

BMI

0.548

0.226

1.730 (1.111,2.693)

0.015*

1.299 (0.791,2.135)

0.301

Asthma and asthma-related symptoms in childhood

2.505

0.391

12.239 (5.690,26.329)

<0.001***

6.877 (2.994,15.767)

<0.001***

Familial history of asthma-like symptoms and asthma

0.897

0.361

2.452 (1.209,4.971)

0.013*

1.934 (0.866,4.319)

0.107

Kitchen location

0.714

0.923

2.042 (0.334,12.478)

0.439

8.807 (1.794,43.241)

0.007**

Stove used for cooking or warming

0.608

0.217

1.836 (1.200,2.810)

0.005**

2.318 (1.349,3.982)

0.002**

Cooking oil fumes

0.973

0.384

2.646 (1.247,5.613)

0.011*

7.926 (2.538,24.753)

<0.001***

Keep pets

1.087

0.403

2.966 (1.347,6.527)

0.007**

0.424 (0.118,1.526)

0.189

Smoking status

0.984

0.240

2.675 (1.670,4.284)

<0.001***

1.546 (0.973,2.457)

0.065*

Second-hand smoke

1.377

0.401

3.963 (1.807,8.691)

<0.001***

2.950 (1.144,7.607)

0.025*

Mattress use history

–

–

–

–

0.281 (0.140,0.562)

<0.001***

Mold in bedroom

–

–

–

–

7.696 (1.903,31.127)

0.004**