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Table 2 Characteristics of the follow up of the study cohort a

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)
  1. amean (SD