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

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

	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

Adjusted for age, sex, height, asbestos exposure and smoking history.
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.

ISSN: 1475-2891