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

Table 3 Relationships between plasma retinol 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	5.5	-15.5,26.6	-8.9	-35.8,17.9
	Q3	4.4	-19.8,28.7	6.6	-24.4,37.6
	Q4	2.6	-25.5,30.9	-16.8	-52.7,19.1
Annual change (ml/year)	Q1	0		0	0
	Q2	4.1	-1.8,10.1	10.3	2.7,17.9
	Q3	7.1	1.0,13.4	11.1	3.2,19.1
	Q4	11.3	4.8,17.7	18.6	2.7,10.3

*Adjusted for age, sex, height, asbestos exposure and smoking history
Quartile 1: Retinol concentrations lower than 2.5 μmol/L; Quartile 2: concentrations more than 2.5 and less than 3.0 μmol/L; quartile 3: concentrations more than 3.0 and less than 3.5; and quartile 4: concentrations equal or greater than 3.5 μmol/L.

ISSN: 1475-2891