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Table 2 Logistic regression results for asthma based on LASSO selected variables (n = 12771)

From: Association of individual and environmental factors exposure with asthma among children: a cross-sectional study in Northern and Southern cities, China

Variable

Category

Northern China(n = 7647)

 

Southern China(n = 5124)

β(95%°ä±õ)

 

β(95%°ä±õ)

Gender: male (ref = girls)

1.404(1.115,1.769)**

 

-

Age (ref = 4 years old)

11 years old

0.472(0.247,0.903)*

 

-

12 years old

0.467(0.237,0.920)*

 

-

13 years old

0.509(0.260,0.997)*

 

-

14 years old

0.343(0.170,0.693)**

 

-

BMI (°ù±ð´Ú = n´Ç)

Normal weight

-

 

0.763(0.532,1.095)

Medication in neonatal perioda(°ù±ð´Ú = n´Ç)

Antibiotic

-

 

2.939(1.676,5.153)***

Hospitalize for diseasea (°ù±ð´Ú = n´Ç)

Eczema/dermatitis

1.623(1.446,2.871)**

 

-

Chronic cough

2.035(1.572,2.635)***

 

-

Asthmatic bronchitis

2.284(1.701,3.066)***

 

2.526(1.724,3.702)***

Infectionsa (°ù±ð´Ú = n´Ç)

Viral

1.966(1.496,2.587)***

 

2.045(1.402,2.984)***

Bacterial

2.055(1.129,3.739)*

 

-

Mycoplasma

1.594(1.156,2.199)**

 

-

Allergen testing (°ù±ð´Ú = n´Ç)

Yes

4.218(3.055,5.824)***

 

3.846(2.347,6.302)***

Allergic problems (°ù±ð´Ú = n´Ç)

Allergic Conjunctivitis

1.280(1.167,1.470)***

 

1.708(1.146,1.744)*

Two or more allergy problem

5.060(4.077,6.279)***

 

-

Allergy seasona (°ù±ð´Ú = n´Ç)

Spring

-

 

1.565(1.053,2.324)*

Summer

-

 

-

Autumn

2.151(1.560,2.967)***

 

-

Winter

3.599(2.477,5.229)***

 

6.930(4.243,11.318)***

Screen time (h) (°ù±ð´Ú = n´Ç)

≧ 4

-

 

3.314(1.386,7.922)**

Paternal or maternal allergya

(°ù±ð´Ú = n´Ç)

Asthma

2.430(1.658,3.561)***

 

-

Allergic Rhinitis

-

 

1.711(1.182,2.477)**

Eczema/dermatitis

1.987(1.430,2.767)***

 

-

Allergic Conjunctivitis

1.537(1.320,1.903)**

 

-

Air the quilt (°ù±ð´Ú = n´Ç)

(at least once every two weeks)

Yes

0.736(0.573,0.944)*

 

0.852(0.420,1.727)

House decoration (years) (°ù±ð´Ú = n´Ç)

&±ô³Ù; 1

2.261(1.617,3.162)***

 

-

  1. OR: Odds Ratio which equals to eβ, β is the regression coefficient. 95%CI, the 95% confidence interval. -,a variable not selected by LASSO. a, In this categorical variables, there are only yes and no results for each category, and the reference value (ref) of the calculated P-value is no.*, 0.01 ≤ P-value < 0.05,**, 0.001 ≤ P-value < 0.01,***, P-value < 0.001