Table 3

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

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.

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.

Granslo et al.

Granslo et al. BMC Pulmonary Medicine 2012 12:76   doi:10.1186/1471-2466-12-76

Open Data