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Table 2 Parental smoking characteristics before and during pregnancy

From: Parental smoking and cessation during pregnancy and the risk of childhood asthma

    

Asthma

   
 

Total

No asthma

 

Prevalence

   
 

N (%)

N (%)

Asthma n (%)

n/N (%)

p-value

aOR* 95%CI

p-value**

Maternal

       

Non-smokersa

28743 (73.1)

26881 (73.3)

1862 (70.5)

6.5

 

1

<0.001

Recent quittersb

5103 (13.0)

4755 (13.0)

348 (13.2)

6.8

 

1.10 (1.0-1.3)

0.218

Smokers

4748 (12.1)

4379 (11.9)

369 (14.0)

7.8

0.001

1.36 (1.2-1.6)

<0.001

Missing

712 (1.8)

650 (1.8)

62 (2.3)

8.7

   

Paternal

       

Non-smokersa

22394 (57.0)

20921 (57.1)

1473 (55.8)

6.6

 

1

<0.001

Recent quttersb

4763 (12.1)

4528 (12.3)

235 (8.9)

4.9

 

0.31 (0.3-0.4)

<0.001

Smokers

9633 (24.5)

8853 (24.1)

780 (29.5)

8.1

<0.001

2.73 (2.4-3.1)

<0.001

Missing

2516 (6.4)

2363 (6.4)

153 (5.8)

6.1

   
  1. aNo smoking before or during pregnancy
  2. bQuit smoking prior to or during pregnancy
  3. *Adjusted for the following maternal factors at birth: asthma, age, parity, pre-pregnancy BMI, ART, and marital status, parental smoking plus gender of child, gestational weeks at birth, mode of delivery and age at the onset of asthma, or among controls, follow-up age
  4. **p-value for adjusted analysis obtained from the trend test (Wald) in logistic regression analysis
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BMC Public Health

ISSN: 1471-2458

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