Table 1
Characteristics of the study population including ex- and never-smokers.
Characteristics Responders Non-responders All p-Value*
N Mean/SD (range) N Mean/SD (range) N Mean/SD (range)
Age, years 310 65.0/6.6 (47.5–87.0) 192 66.0/7.0 (45.0–85.0) 502 65.0/6.8 (45.0–87.0) 0.034
Pack-years 303 12.8/16.0 (0–129.0) 177 14.2/14.7 (0–70.0) 480 13.3/15.5 (0–129.0) 0.354
Cumulative pack-years of SHS exposure 310 23.5/25.2 (0–193.5) 310 23.5/25.2 (0–193.5)
Body mass index (kg/m2) 298 28.2/4.2 (20.1–47.5) 182 28.8/3.9 (19.7–43.6) 480 28.4/4.1 (19.7–47.5) 0.164
Asbestos-exposure index 310 79.1/48.8 (8.0–286.0) 191 71.3/44.4 (4.0–252.0) 501 76.1/47.3 (4.0–286.0) 0.069