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Table 1 Characteristics of newly diagnosed cancer patients according to index cancer site

From: Increasing trends in the prevalence of prior cancer in newly diagnosed lung, stomach, colorectal, breast, cervical, and corpus uterine cancer patients: a population-based study

Index Cancer Site Lung Stomach Colorectum Breast Cervix uteri Corpus uteri
Total Priora Total Priora Total Priora Total Priora Total Priora Total Priora
N = 275,720 N N % N N % N N % N N % N N % N N %
Total 56,930 6309 11.1 78,092 7382 9.5 77,032 5757 7.5 47,860 1588 3.3 7686 206 2.7 8120 542 6.7
Sex
 Male 39,040 4628 11.9 54,479 5800 10.6 44,535 3841 8.6          
 Female 17,890 1681 9.4 23,613 1582 6.7 32,497 1916 5.9 47,860 1588 3.3 7686 206 2.7 8120 542 6.7
Age, years
 Median (IQR) 70 (63–76) 73 (67–78) 71 (63–77) 74 (68–79) 70 (62–77) 73 (67–79) 60 (48–69) 69 (61–76) 52 (41–66) 67 (56–77) 59 (51–68) 62 (52–71)
 15–39 455 15 3.3 864 8 0.9 961 10 1.0 3034 23 0.8 1706 10 1.2 437 18 4.1
 40–44 551 20 3.6 919 17 1.8 1191 29 2.4 4556 35 0.8 998 8 2.1 447 25 5.6
 45–49 1032 39 3.8 1572 39 2.5 1974 47 2.4 5737 61 1.1 806 15 4.2 761 57 7.5
 50–54 1965 98 5.0 2954 107 3.6 3508 103 2.9 4885 91 1.9 650 13 5.4 1121 87 7.8
 55–59 4197 242 5.8 5962 292 4.9 6471 277 4.3 5589 137 2.5 712 21 3.5 1375 59 4.3
 60–64 7902 671 8.5 10,240 658 6.4 10,754 559 5.2 6376 214 3.4 733 26 4.3 1261 64 5.1
 65–69 10,790 1110 10.3 13,402 1197 8.9 13,329 936 7.0 5889 279 4.7 635 19 5.1 1000 67 6.7
 70–74 12,028 1419 11.8 15,508 1686 10.9 14,275 1259 8.8 4693 277 5.9 550 27 7.3 753 68 9.0
 75–79 10,191 1503 14.7 13,493 1774 13.1 12,180 1255 10.3 3429 222 6.5 396 29 7.5 534 42 7.9
 80–84 5702 875 15.3 8550 1077 12.6 7568 857 11.3 2160 153 7.1 271 19 10.5 298 42 14.1
 85–99 2117 317 15.0 4628 527 11.4 4821 425 8.8 1512 96 6.3 229 19 7.8 133 13 9.8
Method of cancer detection
 Screening and medical check-up 8417 399 4.7 11,938 553 4.6 11,299 466 4.1 9565 167 1.7 1580 27 3.3 702 50 7.1
 Incidental detectionb 19,365 4222 21.8 20,721 4003 19.3 15,244 2728 17.9 3938 666 16.9 742 56 11.7 1173 180 15.3
 Other or unknownc 29,148 1688 5.8 45,433 2826 6.2 50,489 2563 5.1 34,357 755 2.2 5364 123 3.6 6245 312 5.0
Cancer stage
 Localized 17,540 2986 17.0 43,352 5027 11.6 35,289 3152 8.9 28,498 1087 3.8 3566 90 5.0 5314 373 7.0
 Regional lymph nodes 7112 785 11.0 9327 725 7.8 15,269 1036 6.8 11,856 343 2.9 382 6 3.2 266 15 5.6
 Regional extension 8188 782 9.6 8477 509 6.0 9034 581 6.4 2179 44 2.0 2529 80 3.8 1577 85 5.4
 Distant metastasis 20,480 1388 6.8 12,500 688 5.5 12,838 659 5.1 2340 48 2.1 666 12 3.8 587 37 6.3
 Other or unknown 3610 368 10.2 4436 433 9.8 4602 329 7.1 2987 66 2.2 543 18 5.1 376 32 8.5
Treatment
 Radiotherapy only 3116 471 15.1 48 14 29.2 93 6 6.5 214 3 1.4 823 38 4.9 67 6 9.0
 Chemotherapy only 15,195 1076 7.1 7455 543 7.3 1974 142 7.2 1984 38 1.9 224 4 4.0 175 13 7.4
 Chemoradiotherapy 7394 515 7.0 166 38 22.9 184 13 7.1 185 4 2.2 1177 32 2.9 21 3 14.3
 Surgery only 15,772 2665 16.9 29,975 2514 8.4 40,687 3331 8.2 16,277 741 4.6 2645 64 5.2 4059 298 7.3
 Surgery plus chemotherapy or radiotherapy 6839 634 9.3 13,618 772 5.7 23,206 1176 5.1 24,665 639 2.6 2057 37 3.7 3277 178 5.4
 Other or unknown 8614 948 11.0 26,830 3501 13.0 10,888 1089 10.0 4535 163 3.6 760 31 5.7 521 44 8.4
Diagnostic year
 2004–2005 7288 538 7.4 9969 635 6.4 9151 498 5.4 5650 143 2.5 1025 23 4.2 876 61 7.0
 2006–2007 8407 803 9.6 11,542 892 7.7 11,295 743 6.6 6913 206 3.0 1098 26 3.8 1029 60 5.8
 2008–2009 8880 856 9.6 12,498 1048 8.4 11,833 825 7.0 7297 244 3.3 1174 28 4.1 1136 75 6.6
 2010–2011 10,240 1195 11.7 13,806 1373 9.9 13,565 1052 7.8 8596 270 3.1 1416 39 4.7 1542 104 6.7
 2012–2013 10,641 1379 13.0 15,047 1661 11.0 15,074 1252 8.3 9050 337 3.7 1451 39 4.8 1720 122 7.1
 2014–2015 11,474 1538 13.4 15,230 1773 11.6 16,114 1387 8.6 10,354 388 3.7 1522 51 4.9 1817 120 6.6
  1. Abbreviation: IQR interquartile range
  2. Categorical variables between cancer patients with and without prior cancer were compared using Pearson’s chi-square test. Significant differences (P ≤ 0.05) were found in all categories except for diagnostic year in corpus uterine cancer patients. aNewly diagnosed cancer patients with prior cancer of the specified site. bDetected during follow-up examination for another disease. cGenerally detected from the occurrence of subjective symptoms