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

BMC Pulmonary Medicine

Table 5 Lung function measures according to exposure from oil tank explosion

	Control	Exposed	Difference between exposed and control
	n = 162	n = 193
	AM (SD)^a	AM (SD)^a	AM difference ^a (95% CI)^b
FEV₁ (mL)	3437 (860)	3273 (915)	−123 (−232, -14)
FEV₁% predicted	92.9 (13.6)	89.5 (15.1)	−2.5 (−5.5, 0.5)
FVC (mL)	4486 (1046)	4248 (1076)	−173 (−297, -50)
FVC % predicted	99.7 (11.9)	96.3 (13.4)	−3.1 (−5.9, -0.4)
FEV₁/FVC ratio	0.767 (0.072)	0.766 (0.083)	−0.001 (0.014, 0.013)
	n (%)	n (%)	Odds ratio (95% CI)^d
Airway obstruction^c before salbutamol	8 (5)	21 (11)	2.5 (1.0, 6.2)
Airway obstruction^c after salbutamol	5 (3)	15 (8)	3.1 (0.98, 9.6)

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
^a Arithmetic mean (Standard deviation). ^b Arithmetic mean difference (95% confidence interval) between exposed group and control group from linear regression models adjusted for smoking, occupational exposure, atopy (defined by Phadiatop^®), infection in the preceding month, height, age and gender (models for FEV1% predicted and FVC% predicted not adjusted for height, age and gender). ^c Airway obstruction defined as FEV₁/FVC < 0.70 and FEV₁% predicted <0.80. ^d Odds ratio (95% confidence interval) between exposed group and control group from logistic regression models with adjustment for smoking, occupational exposure, atopy (defined by Phadiatop^®), infection in the preceding month, age and gender.

ISSN: 1471-2466