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Table 5 Relationships between plasma vitamin E concentrations and lung function levels and annual rate of change*

From: Plasma retinol, carotene and vitamin E concentrations and lung function in a crocidolite-exposed cohort from Wittenoom, Western Australia: a cohort study

  Quartiles FEV1 95%CI FVC 95%CI
Level at entry into program (ml) Q1 0   0  
  Q2 23.5 -1.9, 49.0 33.5 1.0, 66.0
  Q3 38.4 12.0, 64.8 67.0 33.4, 100.6
  Q4 35.9 8.1, 63.7 82.3 47.1, 117.5
Annual change (ml/year) Q1 0   0  
  Q2 -6.8 -10.1, 0.9 -4.4 -11.4, 2.7
  Q3 -4.6 -12.7, -1.0 -7.8 -15.3, -0.3
  Q4 -7.9 -14.3, -1.6 -13.9 -21.9, -6.0
  1. Adjusted for age, sex, height, asbestos exposure and smoking history.
  2. Quartile 1: Vitamin E concentrations lower than 31 μmol/L; Quartile 2: concentrations more than 31 and less than 37 μmol/L; quartile 3: concentrations more than 37 and less than 45; and quartile 4: concentrations equal or greater than 45 μmol/L.