From: Is it useful to combine sputum cytology and low-dose spiral computed tomography for early detection of lung cancer in formerly asbestos-exposed power industry workers?
Mean
SD
Range
Age (years)
65.8
5.8
46 – 78
Time since first exposure (years)
40.4
7.8
26 – 60
Duration of asbestos exposure (years)
29.5
7.7
15 – 49
Pack years
44.7
47.9
0 – 118