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Table 3 Prevalence and odds ratio (OR) of airway symptoms according to exposure from oil tank explosion in men and women

From: Airway symptoms and lung function in the local population after the oil tank explosion in Gulen, Norway

  

Main group analysis

Sub-group analysis

 

Control

Exposed

Exposed (< 6km) vs control

Exposed 3–6 km

Exposed (3–6 km) vs control

Exposed <3 km

Exposed (<3 km) vs control

Linear trend: control/3-6 km/<3 km

Men

n = 99

n = 115

 

n = 59

 

n = 56

  
 

n (%)

n (%)

OR (95% CI)ab

%

OR (95% CI)ab

%

OR (95% CI)ab

P-valueb

Blocked nose

24 (24)

41 (36)

1.8 (0.9, 3.5)

32

1.5 (0.7,3.3)

39

2.2 (1.0, 5.0)

0.046

Rhinorrhoea

13 (13)

29 (25)

1.9 (0.8, 4.8)

24

2.2 (0.9,5.3)

27

2.8 (1.1, 7.3)

0.03

Irritated nose

15 (15)

45 (39)

3.1 (1.4, 7.2)

36

3.4 (1.5, 7.8)

43

4.9 (2.0, 12)

<0.001

Sore throat

15 (15)

37 (32)

2.5 (1.2, 5.2)

37

3.0 (1.3, 6.8)

27

1.8 (0.7, 4.7)

0.10

Morning cough

21 (21)

37 (32)

2.1 (1.0, 4.4)

29

1.4 (0.6, 3.3)

36

3.7 (1.5, 9.1)

0.007

Daily cough

30 (30)

52 (45)

2.0 (1.1, 3.7)

36

1.2 (0.6, 2.5)

56

3.7 (1.7, 8.2)

0.002

Cough > 3 mo/yr

16 (16)

36 (31)

2.5 (1.2, 5.3)

24

1.5 (0.6, 3.7)

39

4.6 (1.8, 11)

0.008

Cough with phlegm

31 (32)

50 (44)

1.9 (1.0, 3.6)

45

1.6 (0.7, 3.3)

45

2.4 (1.1, 5.2)

0.03

Cough with phlegm > 3 mo/yr

9 (9)

25 (22)

2.7 (1.1, 6.6)

14

1.2 (0.4, 3.6)

30

6.7 (2.3, 20)

0.003

Dyspnoeic walking flat

9 (9)

13 (12)

1.1 (0.4, 3.0)

16

1.4 (0.5, 4.1)

7

0.7 (0.2, 3.0)

0.81

Dyspnoeic walking uphill

20 (21)

38 (33)

1.8 (0.9, 3.7)

36

1.7 (0.7, 3.7)

33

2.1 (0.9, 5.0)

0.08

Ever chest wheeze

13 (13)

19 (17)

1.7 (0.7, 4.5)

18

1.5 (0.5, 4.5)

16

2.1 (0.6, 6.7)

0.23

Women

n = 80

n = 108

 

n = 55

 

n = 53

  

Blocked nose

13 (16)

30 (28)

1.6 (0.7, 3.4)

24

1.4 (0.6, 3.6)

32

1.7 (0.7, 4.2)

0.25

Rhinorrhoea

11 (14)

23 (22)

1.5 (0.7, 3.5)

18

1.2 (0.4, 3.1)

25

2.0 (0.8, 5.2)

0.17

Irritated nose

9 (11)

34 (32)

2.9 (1.2, 6.7)

33

3.0 (1.1, 7.6)

30

2.8 (1.0, 7.5)

0.04

Sore throat

7 (9)

36 (33)

4.1 (1.6, 10)

31

3.7 (1.3, 10)

36

4.7 (1.6, 13.7)

0.003

Morning cough

5 (6)

37 (34)

-

38

-

30

-

-

Daily cough

12 (15)

39 (36)

2.5 (1.1, 5.5)

39

2.6 (1.1, 6.5)

36

2.4 (0.95, 6.0)

0.054

Cough > 3 mo/yr

5 (6)

28 (26)

-

24

-

28

-

-

Cough with phlegm

14 (19)

32 (30)

2.0 (0.9, 4.6)

33

2.0 (0.8, 4.8)

28

2.2 (0.8, 4.9)

0.09

Cough with phlegm > 3 mo/yr

2 (3)

14 (13)

-

13

-

13

-

-

Dyspnoeic walking flat

4 (5)

17 (16)

-

15

-

17

-

-

Dyspnoeic walking uphill

24 (30)

37 (34)

1.0 (0.5, 2.0)

29

0.8 (0.4, 1.9)

42

1.3 (0.6, 2.8)

0.63

Ever chest wheeze

8 (10)

17 (16)

1.4 (0.5, 3.8)

13

1.0 (0.3, 3.4)

19

1.9 (0.6, 6.0)

0.29

  1. Exposed status was defined as living <6 km (average 3.7 km) from the explosion site; control status as living >20 km (average 28 km) from the explosion site. Increasing intensity of exposure within the exposed group was defined by dividing the exposed group in those living 3–6 km (average 4.7 km) and <3 km (average 2.6 km) from the explosion site.
  2. a Odds ratio (95% confidence interval). bLogistic regression models with adjustment for smoking, occupational exposure, atopy (defined by Phadiatop®), infection in the preceding month, post-traumatic stress impact score, age.
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