Table 2.
Follow-up period, lung cancer cases, deaths and all-cause deaths in each group
| Male | Female | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|
| CT group | XP group | P | CT group | XP group | P | CT group | XP group | P | |
| Number of subjects | 9790 | 6526 | 8145 | 9022 | 17 935 | 15 548 | |||
| Mean follow-up days (SD) | 3783 (1 054) | 3201 (863) | <0.001 | 3367 (851) | 3 129 (681) | <0.001 | 3594 (989) | 3159 (763) | <0.001 |
| Number of lung cancer cases diagnosed (%) | 169 (1.7) | 111 (1.7) | 0.951 | 104 (1.3) | 53 (0.6) | <0.001 | 273 (1.5) | 164 (1.1) | <0.001 |
| Number of lung cancer deaths (%) | 63 (0.6) | 63 (1.0) | 0.028 | 9 (0.1) | 17 (0.2) | 0.24 | 72 (0.4) | 80 (0.5) | 0.142 |
| Number of cancer deaths, excluding lung cancer (%) | 287 (2.9) | 313 (4.8) | <0.001 | 117 (1.4) | 203 (2.3) | <0.001 | 404 (2.3) | 516 (3.3) | <0.001 |
| Number of all-cause deaths, excluding cancer (%) | 292 (3.0) | 380 (5.8) | <0.001 | 117 (1.4) | 212 (2.4) | <0.001 | 409 (2.3) | 592 (3.8) | <0.001 |