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Table 1 Basic characteristics according to the time period of ovarian cancer diagnosis

From: Changes in ovarian cancer survival during the 20 years before the era of targeted therapy

  Total 1995–1999 2000–2004 2005–2009 2010–2014  
(n = 22,880) (n = 3740) (n = 4863) (n = 6317) (n = 7960)
No. of cases % p-value No. of cases % No. of cases % No. of cases % No. of cases % p-value
Age (years)    <.0001          <.0001
  < 40 3849 16.8   945 25.3 910 18.7 990 15.7 1004 12.6  
 40–59 12,169 53.2   1813 48.5 2526 51.9 3378 53.5 4452 55.9  
  > 59 6862 30.0   982 26.3 1427 29.3 1949 30.9 2504 31.5  
SEER Stage    <.0001          <.0001
 Localized 3865 16.9   1683 26.6 2182 27.4  
 Regional 2564 11.2   1053 16.7 1511 19.0  
 Distant 6795 29.7   2843 45.0 3952 49.6  
 Unspecified 9656 42.2   738 11.7 315 4.0  
Primary treatment    <.0001          <.0001
 Surgery only 6007 26.3   1213 32.4 1252 25.7 1626 25.7 1916 24.1  
 Chemotherapy only 1680 7.3   326 8.7 371 7.6 414 6.6 569 7.1  
 Surgery + Chemotherapy 13,262 58.0   1745 46.7 2713 55.8 3805 60.2 4999 62.8  
 Others 1931 8.4   456 12.2 527 10.8 472 7.5 476 6.0  
Histology    <.0001          <.0001
 Serous carcinoma 10,837 47.4   1459 39.0 2119 43.6 3186 50.4 4073 51.2  
 Mucinous carcinoma 4005 17.5   916 24.5 1027 21.1 951 15.1 1111 14.0  
 Endometrioid carcinoma 2191 9.6   399 10.7 494 10.2 580 9.2 718 9.0  
 Clear cell carcinoma 1923 8.4   164 4.4 327 6.7 551 8.7 881 11.1  
 Others 3924 17.2   802 21.4 896 18.4 1049 16.6 1177 14.8  
  1. SEER Surveillance, Epidemiology, and End Results