From: Plasma retinol, carotene and vitamin E concentrations and lung function in a crocidolite-exposed cohort from Wittenoom, Western Australia: a cohort study
Residents
Workers
Total lung function and blood tests, n (%)
1942 (33.7)
3898 (66.2)
Measurements per person, a
3.43 (1.5)
4.7 (2.5)
Follow up, years, a
3.0 (1.7)
5.4 (3.3)
Months between measurements,a
14.0 (4.8)
16.5 (9.7)