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Table 5 Risk factor analysis: Odds Ratios with 95% Confidence Intervals from logistic regression models

From: Prevalence trends in respiratory symptoms and asthma in relation to smoking - two cross-sectional studies ten years apart among adults in northern Sweden

  

Dependent variables

  

Chronic productive cough

Physician-diagnosed asthma

Recurrent wheeze

  

Study year 1996

Study year 2006

Study year 1996

Study year 2006

Study year 1996

Study year 2006

Independent variables

OR

95% CI

OR

95% CI

OR

95% CI

OR

95% CI

OR

95% CI

OR

95% CI

Age

20-29 years

1

 

1

 

1

 

1

 

1

 

1

 

30-39 years

1.14

(0.82-1.60)

0.87

(0.59-1.28)

0.82

(0.65-1.05)

0.78

(0.60-1.01)

1.04

(0.83-1.31)

1.18

(0.88-1.58)

40-49 years

1.01

(0.73-1.42)

0.85

(0.59-1.22)

0.60

(0.46-0.77)

0.64

(0.50-0.83)

0.82

(0.65-1.04)

1.07

(0.81-1.41)

50-59 years

1.80

(1.32-2.47)

1.07

(0.76-1.52)

0.55

(0.42-0.72)

0.62

(0.48-0.80)

1.03

(0.81-1.29)

1.25

(0.96-1.64)

60-69 years

2.59

(1.90-3.53)

1.35

(0.95-1.92)

0.89

(0.69-1.15)

0.60

(0.46-0.79)

1.31

(1.04-1.65)

1.23

(0.93-1.63)

Sex

Female

1

 

1

 

1

 

1

 

1

 

1

 

Male

1.17

(0.98-1.41)

1.55

(1.25-1.92)

1.05

(0.89-1.24)

0.90

(0.77-1.06)

0.98

(0.85-1.13)

1.19

(1.01-1.39)

Family history of asthma

No/Don’t know

1

 

1

 

1

 

1

 

1

 

1

 

Yes

1.81

(1.49-2.21)

2.37

(1.91-2.95)

3.26

(2.76-3.85)

3.39

(2.88-4.00)

2.41

(2.07-2.79)

2.71

(2.30-3.20)

Smoking habits

Non-smokers

1

 

1

 

1

 

1

 

1

 

1

 

Ex-smokers

0.89

(0.69-1.14)

1.17

(0.89-1.54)

1.33

(1.09-1.64)

1.41

(1.15-1.72)

1.34

(1.10-1.62)

1.50

(1.22-1.85)

<5 cig/day

0.60

(0.35-1.02)

1.41

(0.87-2.28)

1.01

(0.70-1.46)

1.09

(0.74-1.61)

1.70

(1.26-2.30)

2.18

(1.55-3.06)

5-14 cig/day

1.43

(1.09-1.86)

1.61

(1.14-2.27)

0.85

(0.65-1.12)

1.33

(1.01-1.74)

2.61

(2.14-3.17)

3.09

(2.45-3.91)

 

>14 cig/day

3.07

(2.35-4.02)

3.31

(2.23-4.91)

0.95

(0.67-1.34)

0.68

(0.41-1.14)

3.49

(2.77-4.40)

3.32

(2.39-4.63)

  1. Statistically significant Odds Ratios (OR) with corresponding 95% Confidence Intervals (CI) are bolded.