Table 1.
Baseline characteristics of the population eligible for survival analysis.
| Population cohort (n = 72,224) | ||||
|---|---|---|---|---|
| 1977–1986 (n = 11,935) | 1987–1996 (n = 15,690) | 1997–2006 (n = 19,598) | 2007–2016 (n = 25,001) | |
| Age | ||||
| Mean age, years | 69.4 | 70.7 | 71.5 | 71.5 |
| <50 years, n (%) | 665 (5.57) | 835 (5.32) | 1,002 (5.11) | 1,182 (4.73) |
| 50–74 years, n (%) | 6,971 (58.41) | 8,368 (53.33) | 9,489 (48.42) | 12,714 (50.85) |
| ≥75 years, n (%) | 4,299 (36.02) | 6,487 (41.34) | 9,107 (46.47) | 11,105 (44.42) |
| Sex | ||||
| Female, n (%) | 6,444 (53.99) | 8,351 (53.22) | 10,402 (53.08) | 12,787 (51.15) |
| Male, n (%) | 5,491 (46.01) | 7,339 (46.78) | 9,196 (46.92) | 12,214 (48.85) |
| PTL, according to ICD-7 | ||||
| Right side, n (%) | 6,096 (51.08) | 8,220 (52.39) | 11,058 (56.42) | 14,395 (57.58) |
| Left side, n (%) | 5,536 (46.38) | 6,975 (44.46) | 7,762 (39.61) | 10,193 (40.77) |
| Unknown, n (%) | 303 (2.54) | 495 (3.15) | 778 (3.97) | 413 (1.65) |
| PTL, according to ICDO-3 | ||||
| Right side, n (%) | — | — | — | 13,546 (54.18) |
| Left side, n (%) | — | — | — | 11,042 (44.17) |
| Unknown, n (%) | — | — | — | 413 (1.65) |
| Morphology, according to ICDO-3 | ||||
| Adenocarcinomas (814–838), n (%) | 11,368 (95.25) | 14,416 (91.88) | 16,995 (86.72) | 22,102 (88.40) |
| MSC adenocarcinomas (844–849), n (%) | 558 (4.68) | 1,255 (8.00) | 2,551 (13.02) | 2,829 (11.32) |
| Other carcinomas, n (%) | 9 (0.08) | 19 (0.12) | 52 (0.27) | 70 (0.28) |
| Stage | ||||
| Localized, n (%) | 3,436 (28.79) | 4,618 (29.43) | 3,687 (18.81) | 4,272 (17.09) |
| Regional, n (%) | 5,423 (45.44) | 6,765 (43.12) | 10,181 (51.95) | 13,895 (55.58) |
| Distant, n (%) | 2,982 (24.99) | 3,971 (25.31) | 4,735 (24.16) | 5,941 (23.76) |
| Unknown, n (%) | 94 (0.79) | 336 (2.14) | 995 (5.08) | 893 (3.57) |
| Follow-up | ||||
| No available follow-upa, n (%) | 667 (5.59) | 708 (4.51) | 752 (3.84) | 583 (2.33) |
| Median follow-upb, years | 3.1 | 3.3 | 4.5 | 2.7 |
| Mean follow-upb, years | 7.5 | 7.3 | 6.6 | 3.4 |
aDate of diagnosis equals date of death.
bExcluding patients with no available follow-up.