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Table 2 Comparison of smoking and SHS exposure variables between cases and controls

From: Determining the burden of secondhand smoke exposure on the respiratory health of Thai children

Measures

Cases

Controls

P-value

 

n /%

n /%

 

Mother smoked during pregnancy*

Yes

24 / 5.2

17 / 3.7

0. 263

No

438 / 94.8

445/ 96.3

 

Average number of cigarettes mother smoked per day during pregnancy **

Range 0–20 per day, mean ± SD

0.25 ±1.46

0.17 ±1.26

0.40

Child’s exposure to SHS during pregnancy*

Yes

147 / 31.8

95 / 20.6

0.01

No

315 / 68.2

367 / 79.4

 

Number of smokers in household*

1-2 persons

271 / 93.1

236 / 97.1

0.036

3-4 persons

20 / 6.9

6 / 2.5

 

4-5 persons

0 / 0

1 / 0.4

 

Total number of cigarettes smoked in household per day *

Range 1–40 per day, mean ± SD

12.08 ±7.71

9.95 ±6.90

<0.001

Child’s exposure to cigarette smoke while being held by a caregiver*

Yes

121/26.2

31/6.7

0.01

No

341/73.8

431/93.3

 

Child’s exposure to smoke produced from cooking*

Yes

134 / 45.3

131 / 44.3

0.9

No

162 / 54.7

165 / 55.7

 

*Chi-squared test

   

** Student’s t-test