Table 1. Characteristics of patients stratified by sex, diagnostic period, histological type, stage, and age group.
| Year | ||||||||||||||||
| 1975–79 | 1980–84 | 1985–89 | 1990–94 | 1995–99 | 2000–04 | 2005–08 | Total (1975–2008) | |||||||||
| n | % | n | % | n | % | n | % | n | % | n | % | n | % | n | % | |
| Males | ||||||||||||||||
| Histological type (before imputationa) | ||||||||||||||||
| Squamous cell carcinoma | 1038 | 18.6 | 1953 | 25.3 | 2664 | 25.8 | 2997 | 23.9 | 3936 | 25.1 | 4487 | 23.8 | 3853 | 22.0 | 20 928 | 23.7 |
| Adenocarcinoma | 913 | 16.3 | 1702 | 22.0 | 2556 | 24.8 | 3023 | 24.1 | 4645 | 29.6 | 5909 | 31.3 | 5859 | 33.5 | 24 607 | 27.9 |
| Small cell carcinoma | 321 | 5.7 | 754 | 9.8 | 1124 | 10.9 | 1395 | 11.1 | 1794 | 11.4 | 2134 | 11.3 | 1843 | 10.5 | 9365 | 10.6 |
| Others | 221 | 4.0 | 480 | 6.2 | 700 | 6.8 | 669 | 5.3 | 780 | 5.0 | 1028 | 5.4 | 1333 | 7.6 | 5211 | 5.9 |
| Missing | 3095 | 55.4 | 2841 | 36.8 | 3278 | 31.8 | 4440 | 35.5 | 4530 | 28.9 | 5325 | 28.2 | 4614 | 26.4 | 28 123 | 31.9 |
| Histological type (after imputation) | ||||||||||||||||
| Squamous cell carcinoma | 2370 | 42.4 | 3200 | 41.4 | 3956 | 38.3 | 4740 | 37.9 | 5572 | 35.5 | 6423 | 34.0 | 5308 | 30.3 | 31 568 | 35.8 |
| Adenocarcinoma | 1954 | 35.0 | 2628 | 34.0 | 3706 | 35.9 | 4555 | 36.4 | 6432 | 41.0 | 7986 | 42.3 | 7801 | 44.6 | 35 062 | 39.7 |
| Small cell carcinoma | 772 | 13.8 | 1168 | 15.1 | 168 | 16.3 | 2177 | 17.4 | 2584 | 16.5 | 3072 | 16.3 | 2613 | 14.9 | 14 069 | 15.9 |
| Others | 492 | 8.8 | 735 | 9.5 | 977 | 9.5 | 1052 | 8.4 | 1098 | 7.0 | 1403 | 7.4 | 1780 | 10.2 | 7536 | 8.5 |
| Stageb (before imputation) | ||||||||||||||||
| Localised | 657 | 11.8 | 867 | 11.2 | 1158 | 11.2 | 1340 | 10.7 | 2022 | 12.9 | 2694 | 14.3 | 2797 | 16.0 | 11 535 | 13.1 |
| Regional | 1525 | 27.3 | 2078 | 26.9 | 2900 | 28.1 | 3377 | 27.0 | 4209 | 26.8 | 4694 | 24.9 | 4077 | 23.3 | 22 860 | 25.9 |
| Distant | 1121 | 20.1 | 1949 | 25.2 | 2757 | 26.7 | 2997 | 23.9 | 3840 | 24.5 | 4929 | 26.1 | 5334 | 30.5 | 22 927 | 26.0 |
| Missing | 2285 | 40.9 | 2836 | 36.7 | 3507 | 34.0 | 4810 | 38.4 | 5614 | 35.8 | 6566 | 34.8 | 5294 | 30.3 | 30 912 | 35.0 |
| Stage (after imputation) | ||||||||||||||||
| Localised | 1084 | 19.4 | 1404 | 18.2 | 1756 | 17.0 | 2142 | 17.1 | 2943 | 18.8 | 3814 | 20.2 | 3497 | 20.0 | 16 640 | 18.9 |
| Regional | 2492 | 44.6 | 3290 | 42.6 | 4351 | 42.2 | 5380 | 43.0 | 6521 | 41.6 | 7414 | 39.3 | 6048 | 34.6 | 35 496 | 40.2 |
| Distant | 2012 | 36.0 | 3037 | 39.3 | 4214 | 40.8 | 5003 | 40.0 | 6220 | 39.7 | 7655 | 40.5 | 7957 | 45.5 | 36 098 | 40.9 |
| Age group, years | ||||||||||||||||
| 15–34 | 42 | 0.8 | 45 | 0.6 | 34 | 0.3 | 43 | 0.3 | 43 | 0.3 | 57 | 0.3 | 32 | 0.2 | 296 | 0.3 |
| 35–64 | 2077 | 37.2 | 2561 | 33.1 | 3547 | 34.4 | 4105 | 32.8 | 4684 | 29.9 | 5129 | 27.2 | 4200 | 24.0 | 26 303 | 29.8 |
| 65–74 | 2276 | 40.7 | 3040 | 39.3 | 3466 | 33.6 | 4141 | 33.1 | 5731 | 36.5 | 6853 | 36.3 | 6093 | 34.8 | 31 600 | 35.8 |
| ≥75 | 1193 | 21.4 | 2084 | 27.0 | 3275 | 31.7 | 4235 | 33.8 | 5227 | 33.3 | 6844 | 36.2 | 7177 | 41.0 | 30 035 | 34.0 |
| Females | ||||||||||||||||
| Histological type (before imputation) | ||||||||||||||||
| Squamous cell carcinoma | 170 | 8.1 | 285 | 9.7 | 472 | 11.6 | 504 | 9.9 | 677 | 10.4 | 759 | 9.4 | 641 | 8.5 | 3508 | 9.7 |
| Adenocarcinoma | 507 | 24.1 | 970 | 33.1 | 1443 | 35.5 | 1862 | 36.5 | 2850 | 43.8 | 3690 | 45.8 | 3722 | 49.5 | 15 044 | 41.5 |
| Small cell carcinoma | 68 | 3.2 | 215 | 7.3 | 310 | 7.6 | 390 | 7.6 | 510 | 7.8 | 537 | 6.7 | 462 | 6.1 | 2492 | 6.9 |
| Others | 59 | 2.8 | 119 | 4.1 | 187 | 4.6 | 205 | 4.0 | 221 | 3.4 | 287 | 3.6 | 355 | 4.7 | 1433 | 4.0 |
| Missing | 1296 | 61.7 | 1341 | 45.8 | 1659 | 40.8 | 2145 | 42.0 | 2246 | 34.5 | 2777 | 34.5 | 2346 | 31.2 | 13 810 | 38.1 |
| Histological type (after imputation) | ||||||||||||||||
| Squamous cell carcinoma | 454 | 21.6 | 584 | 20.0 | 801 | 19.7 | 936 | 18.3 | 1058 | 16.3 | 1241 | 15.4 | 981 | 13.0 | 6056 | 16.7 |
| Adenocarcinoma | 1269 | 60.4 | 1748 | 59.7 | 2420 | 59.5 | 3128 | 61.3 | 4295 | 66.0 | 5472 | 68.0 | 5275 | 70.1 | 23 607 | 65.1 |
| Small cell carcinoma | 224 | 10.7 | 388 | 13.2 | 550 | 13.5 | 697 | 13.6 | 811 | 12.5 | 910 | 11.3 | 747 | 9.9 | 4326 | 11.9 |
| Others | 153 | 7.3 | 210 | 7.2 | 299 | 7.4 | 345 | 6.8 | 341 | 5.2 | 427 | 5.3 | 523 | 7.0 | 2299 | 6.3 |
| Stage (before imputation) | ||||||||||||||||
| Localised | 206 | 9.8 | 276 | 9.4 | 395 | 9.7 | 545 | 10.7 | 954 | 14.7 | 1549 | 19.2 | 1585 | 21.1 | 5510 | 15.2 |
| Regional | 540 | 25.7 | 662 | 22.6 | 951 | 23.4 | 1107 | 21.7 | 1504 | 23.1 | 1493 | 18.6 | 1338 | 17.8 | 7595 | 20.9 |
| Distant | 426 | 20.3 | 781 | 26.7 | 1099 | 27.0 | 1251 | 24.5 | 1527 | 23.5 | 2036 | 25.3 | 2067 | 27.5 | 9187 | 25.3 |
| Missing | 928 | 44.2 | 1211 | 41.3 | 1626 | 39.9 | 2203 | 43.2 | 2519 | 38.7 | 2972 | 36.9 | 2536 | 33.7 | 13 995 | 38.6 |
| Stage (after imputation) | ||||||||||||||||
| Localised | 367 | 17.5 | 489 | 16.7 | 659 | 16.2 | 891 | 17.5 | 1354 | 20.8 | 2058 | 25.6 | 1914 | 25.4 | 7731 | 21.3 |
| Regional | 923 | 44.0 | 1169 | 39.9 | 1628 | 40.0 | 2013 | 39.4 | 2521 | 38.8 | 2716 | 33.7 | 2269 | 30.2 | 13 239 | 36.5 |
| Distant | 810 | 38.6 | 1272 | 43.4 | 1784 | 43.8 | 2202 | 43.1 | 2629 | 40.4 | 3276 | 40.7 | 3343 | 44.4 | 15 317 | 42.2 |
| Age group, years | ||||||||||||||||
| 15–34 | 32 | 1.5 | 24 | 0.8 | 25 | 0.6 | 27 | 0.5 | 27 | 0.4 | 33 | 0.4 | 25 | 0.3 | 193 | 0.5 |
| 35–64 | 798 | 38.0 | 960 | 32.8 | 1192 | 29.3 | 1460 | 28.6 | 1805 | 27.8 | 2128 | 26.4 | 1807 | 24.0 | 10 150 | 28.0 |
| 65–74 | 786 | 37.4 | 1043 | 35.6 | 1343 | 33.0 | 1511 | 29.6 | 1830 | 28.1 | 2245 | 27.9 | 2166 | 28.8 | 10 924 | 30.1 |
| ≥75 | 484 | 23.1 | 903 | 30.8 | 1511 | 37.1 | 2108 | 41.3 | 2842 | 43.7 | 3644 | 45.3 | 3528 | 46.9 | 15 020 | 41.4 |
aThe number and proportion by stage and histological type are calculated before and after multiple imputation.
bStage at diagnosis is classified into three groups: localised (cancer is confined to the organ from which is originated, regional (cancer metastasizes into regional lymph nodes and/or invades adjacent organs), distant (cancer metastasizes to distant organs and/or lymph nodes).