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Table 2 Respiratory symptoms in relation to residential coal burning

From: Respiratory symptoms in relation to residential coal burning and environmental tobacco smoke among early adolescents in Wuhan, China: a cross-sectional study

 

Cough with colds

Cough without colds

 

No

Yes

  

No

Yes

  

Exposure

N

N

OR*

(95% CI)

N

N

OR*

(95% CI)

Total

3413

1117

  

4327

203

  

Coal use

        

   No

1833

622

1.00

 

2347

108

1.00

 

   Yes

1580

495

0.92

(0.76,1.11)

1980

95

1.03

(0.80,1.33)

Heating

300

99

0.96

(0.76,1.22)

381

18

1.02

(0.67,1.55)

Cooking

926

249

0.79

(0.67,0.94)

1120

55

1.04

(0.74,1.46)

Both

354

147

1.22

(0.93,1.59)

479

22

0.99

(0.66,1.49)

 

Phlegm with colds

Phlegm without colds

 

No

Yes

  

No

Yes

  
 

N

N

OR*

(95% CI)

N

N

OR*

(95% CI)

Total

3772

758

  

4274

256

  

Coal use

        

   No

2051

404

1.00

 

2315

140

1.00

 

   Yes

1721

354

1.04

(0.90,1.20)

1959

116

0.96

(0.75,1.23)

Heating

331

68

1.04

(0.86,1.27)

376

23

1.02

(0.62,1.66)

Cooking

994

181

0.92

(0.76,1.10)

1114

61

0.86

(0.64,1.16)

Both

396

105

1.34

(1.05,1.73)

469

32

1.12

(0.81,1.54)

 

Wheeze with colds

Wheeze without colds

 

No

Yes

  

No

Yes

  
 

N

N

OR*

(95% CI)

N

N

OR*

(95% CI)

Total

3652

878

  

4210

320

  

Coal use

        

   No

2058

397

1.00

 

2309

146

1.00

 

   Yes

1594

481

1.57

(1.07,2.29)

1901

174

1.44

(1.05,1.97)

Heating

329

70

1.10

(0.76,1.57)

368

31

1.35

(0.86,2.15)

Cooking

892

283

1.66

(1.01,2.73)

1077

98

1.42

(1.05,1.92)

Both

373

128

1.78

(1.08,2.91)

456

45

1.57

(0.94,2.64)

  1. * Odds ratios (OR) adjusted for gender, ETS, and school district. Dichotomous and multilevel odds ratios are computed in separate models.