Table 1

Patient characteristics
NORMAL LFT* IMPAIRED LFT
399 276
Age
Median (range), years 56 (26–93) 62 (24–83)
Gender
Male 214 (54%) 169 (61%)
Female 185 (46%) 107 (39%)
Smoking habit
Non-smokers 42 (11%) 44 (16%)
Current smokers 269 (67%) 152 (55%)
Ex-smokers 88 (22%) 80 (29%)
No. of cigarettes smoked per day
≤ 20 241 (60%) 129 (47%)
> 20 114 (29%) 102 (37%)
Missing 2 1
Packs-year
≤ 40 239 (60%) 117 (42%)
> 40 116 (29%) 113 (41%)
Missing 2 2
Years since quitting
≤ 10 35 (9%) 37 (13%)
>10 29 (7%) 25 (9%)
Missing 24 18
LFT impairment (obstructive or restrictive)
Mild 152 (55%)
Moderate 73 (26%)
Severe 51 (18%)

* LFT, Lung Function Tests.

Mattioni et al.

Mattioni et al. BMC Cancer 2013 13:62   doi:10.1186/1471-2407-13-62

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