Table 2 Characteristics of asbestos exposure in 2552 Wittenoom women and girls who did not work directly with asbestos
n (%)
Year of arrival at Wittenoom
    1940s106 (4)
    1950s907 (35)
    1960s1101 (43)
    1970s413 (16)
    Unknown25 (1)
Age at arrival at Wittenoom
    <5 years750 (29)
    5 to <15 years442 (17)
    15 to <40 years1129 (44)
    ⩾40 years206 (8)
    Unknown25 (1)
Duration of residence
    <1 year1027 (40)
    1 to <3 years693 (27)
    3 to <5 years439 (17)
    ⩾5 years363 (14)
    Unknown30 (1)
Average intensity of exposure (cumulative exposure*/years)
    <2 f/ml722 (28)
    2 to <5 f/ml1790 (70)
    5 to <10 f/ml2 (0)
    ⩾10 f/ml7 (0)
    Unknown31 (1)
Cumulative asbestos exposure* (f/ml years)
    0–9.9 f/ml years2070 (81)
    10–19.9 f/ml years295 (12)
    20–29.9 f/ml years93 (4)
    30–39.9 f/ml years39 (1)
    ⩾40 f/ml years24 (1)
    Unknown31 (1)
    Total2552
Lived with asbestos worker
    Yes1638 (64)
    No862 (34)
    Unknown52 (2)
Washed clothes of ABA worker
    Yes566 (22)
    No1290 (51)
    Unknown696 (27)
  • *Adjusted by a factor of 4.2 ((24×7)/(8×5)) to convert 8 h/5 day a week exposures to 24 h/7 day a week exposures.