Table 2 Prevalence and odds ratio (OR) of airway symptoms according to exposure from oil tank explosion
Main group analysis | Sub-group analysis | |||||||
|---|---|---|---|---|---|---|---|---|
Control | Exposed | Exposed (<6 km) vs control | Exposed 3–6 km | Exposed (3-6km) vs control | Exposed <3 km | Exposed (<3km) vs control | Linear trend:control/3-6 km/<3 km | |
n = 179 | n = 223 | n = 114 | n = 109 | |||||
n (%) | n (%) | OR (95% CI)ab | % | OR (95% CI)ab | % | OR (95% CI)ab | P-valueb | |
Blocked nose | 37 (21) | 71 (32) | 1.7 (1.0, 2.8) | 28 | 1.5 (0.8, 2.6) | 36 | 2.0 (1.1, 3.6) | 0.020 |
Rhinorrhoea | 24 (13) | 52 (23) | 1.9 (1.1, 3.4) | 21 | 1.6 (0.9, 3.1) | 26 | 2.4 (1.2, 4.6) | 0.010 |
Irritated nose | 24 (13) | 79 (35) | 3.4 (2.0, 5.9) | 34 | 3.2 (1.7, 5.9) | 37 | 3.7 (2.0, 7.0) | <0.001 |
Sore throat | 22 (12) | 73 (33) | 3.1 (1.8, 5.5) | 34 | 3.4 (1.8, 6.3) | 31 | 2.9 (1.5, 6.6) | 0.001 |
Morning cough | 26 (15) | 74 (33) | 3.5 (2.0, 6.2) | 33 | 3.0 (1.6, 5.7) | 33 | 4.3 (2.2, 6.7) | <0.001 |
Daily cough | 42 (24) | 91 (42) | 2.3 (1.4, 3.7) | 38 | 1.8 (1.0, 3.1) | 46 | 3.0 (1.7, 6.4) | <0.001 |
Cough > 3 mo/yr | 21(12) | 64 (29) | 2.9 (1.5, 5.3) | 24 | 2.1 (1.0, 4.3) | 34 | 4.1 (2.0, 8.4) | <0.001 |
Cough with phlegm | 45 (26) | 82 (38) | 1.9 (1.2, 3.1) | 39 | 1.8 (1.0, 3.2 | 37 | 2.1 (1.2, 3.8) | 0.010 |
Cough with phlegm > 3 mo/yr | 11 (6) | 39 (17) | 2.9 (1.3, 6.2) | 13 | 1.6 (0.6, 3.8) | 22 | 5.7 (2.3, 14.2) | <0.001 |
Dyspnoeic walking flat | 13 (7) | 30 (14) | 1.8 (0.9, 3.8) | 15 | 1.8 (0.8, 4.0) | 12 | 1.9 (0.8, 4.5) | 0.132 |
Dyspnoeic walking uphill | 44 (25) | 75 (35) | 1.5 (0.9, 2.4) | 33 | 1.3 (0.7, 2.3) | 37 | 1.7 (0.95, 3.0) | 0.075 |
Ever chest wheeze | 21 (12) | 36 (16) | 1.7 (0.8, 3.2) | 15 | 1.3 (0.6, 2.9) | 17 | 2.2 (0.98, 4.9) | 0.061 |