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Table 2 Change in FEV1 (∆FEV1) and FEV1/FVC ratio (∆FEV1/FVC ratio %) per year from baseline (2008/2009) to follow-up (2012/2013) in the exposed and non-exposed group, and among exposed men who did and did not take part in accident related tasks (ART)

From: A follow-up study of airway symptoms and lung function among residents and workers 5.5 years after an oil tank explosion

 

Number

∆FEV1 (mL/year)

p

∆FEV1/FVC ratio (%/year)

p

crude mean (SEM)

Adjusted difference (95% CI)a

crude mean (SEM)

Adjusted difference 95% CIa

Men

 Non-exposed l

49

−14 (10)

ref

  

−0.5 (0.1)

ref

  

 Exposed

105

−22 (4)

−14

(−40, 12)

0.3

−0.5 (0.1)

−0.1

(−0.5, 0.2)

0.5

Exposed men only

 No ART

78

−12 (8)

ref

  

−0.4 (0.1)

ref

  

 ART

27

−48 (14)

−34

(−67, −1)

0.04

−0.8 (0.2)

−0.4

(−0.9, 0.0)

0.05

Women

 Non-exposed

45

−15 (32)

ref

  

−0.5 (−0.2)

ref

  

 Exposed

74

−4 (6)

8

(−13, 28)

0.5

−0.4 (−0.1)

0.1

(−0.3, 0.6)

0.5

  1. ART accident related tasks (fire-fighting or clean-up activities first 6 months)
  2. SEM standard error of the mean
  3. Adjusted difference: difference adjusted for smoking habit (in 2008), atopy, occupational exposure, age and height
  4. a95% confidence interval