Table 1 Characteristics of lung cancer (LC) cases diagnosed between July 1, 1997 and December 31, 2006 in screening participants, invitation-to-screening group and control group [26]
Variable | Screening participants (67 LC cases) | Invitation-to-screening group (245 LC cases) | Control group (156 LC cases) |
|---|---|---|---|
Age, median (IQR) | 66 (60–72) | 68 (60–73) | 68 (62–73) |
Gender M/F | 60/7 | 221/24 | 144/12 |
Smoking habit, n (%)a,b | |||
 Ex smokers | 16 (24) | 60 (25) | 77 (49) |
 Smokers | 50 (76) | 180 (75) | 79 (51) |
LC stage at diagnosis, n (%) | |||
 I | 21 (32) | 49 (21) | 23 (15) |
 II | 3 (5) | 13 (6) | 9 (6) |
 III/IV | 41 (63) | 166 (73) | 122 (79) |
 Indeterminate/not available | 2 | 17 | 2 |
 LC cases with censored follow-up*, n (%) | 21 (31 %) | 57 (23 %) | 12 (8 %) |
 LC follow-up months*, median (IQR) | 14.03 (30.82) | 11.89 (22.54) | 8.20 (15.82) |